Free Online Calculators, Instantly

Days From Date Calculator

Find out exactly what date it will be a certain number of days from any date.

Days Before Date Calculator

Find out exactly what date it was a certain number of days before any date.

Days Between Two Dates Calculator

Calculate the exact number of days, weeks, months and working days between two dates.

Working Days Calculator

Calculate the number of working days (business days) between two dates, excluding weekends and public holidays.

Deadline Calculator

Find your exact deadline date by adding a number of allowed days to the date you received a notice.

Day of Week Calculator

Find the day of the week, ISO week number, day of year, and leap-year status for any date.

Countdown Calculator

Live countdown to any future date, showing days, hours, minutes and seconds remaining.

Date Difference Calculator

Compare two dates and see the difference in years, months, days, total days, weeks and hours.

Days Until Calculator

Find out exactly how many days until Christmas, New Year, a birthday, or any date you choose.

Days Since Calculator

Find out exactly how many days have passed since your birth date, wedding day, or any past event.

Weekday Count Calculator

Find out how many times a specific weekday (like Friday) occurs in any given year.

Week Number Calculator

Find the ISO-8601 week number for any date.

Day of Year Calculator

Find which day number of the year any date falls on, and how many days remain.

Month Days Calculator

Find the first or last occurrence of any weekday in a month, or list every weekend date in a month.

Notice Period Calculator

Enter your resignation date and notice period to find your exact last working day.

Invoice Due Date Calculator

Calculate the exact invoice due date for Net 7, 15, 30 or 60 payment terms.

Contract End Date Calculator

Find the exact contract end date from a start date and duration, with a renewal reminder.

Visa Expiry Calculator

Calculate your visa expiry date and remaining days from the issue date and validity period.

Time Calculator (Add/Subtract Hours & Minutes)

Add or subtract hours and minutes to/from any time of day and get the exact resulting clock time.

Time Duration Calculator

Calculate the duration between two times of day, broken into hours, minutes and seconds.

Hours Between Two Times

Calculate the number of hours between two times of day.

Minutes Between Two Times

Calculate the number of minutes between two times of day.

Seconds Between Two Times

Calculate the number of seconds between two times of day.

Time Difference Calculator

Find the exact time difference between two clock times.

Time Until Calculator

Live countdown showing exactly how much time remains until any time of day.

Time Since Calculator

Find out exactly how much time has elapsed since any time of day.

Sleep Calculator

Find the best wake-up times based on 90-minute sleep cycles if you go to bed at a given time.

Bedtime Calculator

Find the best bedtimes based on 90-minute sleep cycles to wake up refreshed at a given time.

Wake Up Time Calculator

Find the best wake-up times based on 90-minute sleep cycles if you go to bed at a given time.

Nap Calculator

Find the ideal nap length and wake-up time — power nap, full sleep cycle, or recovery nap.

World Clock

See the current local time right now in major cities around the world, updating live.

Time Zone Converter

Convert a time from one city's time zone to another, fully daylight-saving-time aware.

UTC Converter

Convert any city's local time to UTC (Coordinated Universal Time).

GMT Converter

Convert any city's local time to GMT (Greenwich Mean Time).

Meeting Time Planner

Enter a meeting time in your city and instantly see the equivalent local time in every other city on your list.

Flight Duration Calculator

Calculate real flight duration between a departure and arrival time in two different time zones.

Hours to Minutes

Convert hours to minutes instantly with the formula shown.

Hours to Seconds

Convert hours to seconds instantly with the formula shown.

Minutes to Hours

Convert minutes to hours instantly with the formula shown.

Minutes to Seconds

Convert minutes to seconds instantly with the formula shown.

Seconds to Minutes

Convert seconds to minutes instantly with the formula shown.

Seconds to Hours

Convert seconds to hours instantly with the formula shown.

Days to Hours

Convert days to hours instantly with the formula shown.

Weeks to Hours

Convert weeks to hours instantly with the formula shown.

Months to Hours

Convert months to hours instantly using a calendar-average month length.

Years to Hours

Convert years to hours instantly using a calendar-average year length.

Decimal Hours Calculator

Convert HH:MM time to decimal hours (or back again) — handy for payroll and timesheets.

Military Time Converter

Convert any time between 12-hour and 24-hour (military) format.

12-Hour to 24-Hour Converter

Convert any time between 12-hour and 24-hour format.

Unix Timestamp Converter

Convert any Unix timestamp (epoch time) to a human-readable date, or a date back to its timestamp.

Age Calculator

Find your exact age in years, months and days, plus a decimal age and total-days breakdown.

Age on a Specific Date Calculator

Find out how old someone was (or will be) on any specific date, not just today.

Decimal Age Calculator

Find your age expressed as a single decimal number of years (e.g. 27.43).

Age in Days Calculator

Find out exactly how many days old you are.

Age in Weeks Calculator

Find out exactly how many weeks old you are.

Age in Months Calculator

Find out exactly how many months old you are.

Age in Hours Calculator

Find out exactly how many hours old you are.

Age in Minutes Calculator

Find out exactly how many minutes old you are.

Age in Seconds Calculator

Find out exactly how many seconds old you are.

Baby Age Calculator

Find a baby's exact age in days, weeks and months — handy for pediatric milestones.

Age Difference Calculator

Find the exact age gap between two people, in years, months and days.

Parent-Child Age Difference Calculator

Find the exact age gap between a parent and child.

Sibling Age Difference Calculator

Find the exact age gap between siblings.

Birthday Calculator

Find your next birthday date and how old you'll turn.

Next Birthday Calculator

Find the exact date of your next birthday and how old you'll turn.

Birthday Countdown Calculator

Live countdown to your next birthday, updating every second.

Leap Year Birthday Calculator

For people born on February 29th — find when to celebrate in non-leap years, and count down to the next birthday.

Birth Year Calculator

Enter your current age to find your likely birth year (or year range).

Work Experience Calculator

Calculate total work experience from a job start date to today.

Service Length Calculator

Calculate total length of service from a start date to today.

Employee Tenure Calculator

Calculate an employee's exact tenure from their hire date to today.

Anniversary Calculator

Calculate how long you've been together and count down to your next anniversary.

Relationship Duration Calculator

Calculate exactly how long you've been in a relationship.

Retirement Age Calculator

Find the exact date you'll reach your chosen retirement age.

Retirement Date Calculator

Find your exact retirement date based on your birth date and target retirement age.

Years Until Retirement Calculator

Find out exactly how many years remain until your target retirement age.

Pension Age Calculator

Find the exact date you'll reach your pension eligibility age.

School Age Calculator

Check a child's exact age as of a school enrollment cutoff date.

Kindergarten Age Calculator

Check whether a child meets the age requirement for kindergarten by the enrollment cutoff date.

Grade Eligibility Calculator

Check whether a child meets the age requirement for a grade level by the enrollment cutoff date.

Pregnancy Due Date Calculator

Estimate your due date from the first day of your last menstrual period.

Pregnancy Week Calculator

Find out exactly how many weeks pregnant you are today.

Gestational Age Calculator

Calculate gestational age in weeks and days from the last menstrual period.

Age Milestone Calculator

See every major birthday and round-number day milestone (1,000, 10,000, 20,000 days old) for any birth date.

10,000 Days Old Calculator

Find the exact date you turn (or turned) 10,000 days old.

Marriage Age Eligibility Calculator

Check when someone reaches the commonly-cited legal marriage age.

Voting Age Calculator

Check when someone reaches the commonly-cited legal voting age.

Driving License Age Calculator

Check when someone reaches the commonly-cited minimum driving age.

Senior Citizen Eligibility Calculator

Check when someone reaches the commonly-cited senior citizen age for discounts and programs.

Insurance Age Calculator

Calculate your insurance age using the "age nearest birthday" convention many insurers use.

Dog Age Calculator

Convert your dog's age into human years using an accurate nonlinear formula.

Cat Age Calculator

Convert your cat's age into human years using an accurate nonlinear formula.

Pet Age Calculator

Convert your dog's or cat's age into human years.

Zodiac Age Calculator

Find your zodiac sign and exact current age together.

Planet Age Calculator

See your equivalent age on every planet in the solar system, based on orbital period.

EMI Calculator

Calculate your monthly EMI (equated monthly installment) for any loan amount, interest rate and term.

Loan Calculator

Calculate your monthly loan payment, total interest, and total repayment amount.

Mortgage Calculator

Calculate your monthly mortgage payment, total interest, and total cost.

Education Loan Calculator

Calculate your monthly education/student loan payment and total interest cost.

Loan Payoff Calculator

See how much time and interest an extra monthly payment saves on a loan.

Debt Payoff Calculator

See how much time and interest an extra monthly payment saves on paying off debt.

Loan Affordability Calculator

Find the maximum loan you can afford based on your income and a target debt-to-income ratio.

House Affordability Calculator

Find the maximum home price you can afford based on your income and a target debt-to-income ratio.

Credit Card Payoff Calculator

See exactly how many months it takes to pay off a credit card balance at a fixed monthly payment.

Debt Snowball Calculator

Plan your debt payoff order using the snowball method (smallest balance first).

Debt Avalanche Calculator

Plan your debt payoff order using the avalanche method (highest interest rate first).

Interest Calculator

Calculate simple or compound interest on any principal, rate and term.

Compound Interest Calculator

Calculate compound interest growth on any principal, rate and term.

Simple Interest Calculator

Calculate simple interest on any principal, rate and term.

SIP Calculator

Calculate the future value of a systematic investment plan (SIP) with monthly contributions.

Savings Calculator

Calculate how much your regular monthly savings will grow to over time.

Recurring Deposit (RD) Calculator

Calculate the maturity value of a recurring deposit with monthly contributions.

Dollar Cost Averaging Calculator

Calculate the future value of regular fixed-amount investments over time.

College Savings Calculator

Calculate how much your monthly college savings contributions will grow to.

Investment Calculator

Calculate the future value of a lump-sum investment.

Fixed Deposit (FD) Calculator

Calculate the maturity value of a fixed deposit.

Lump Sum Investment Calculator

Calculate the future value of a one-time lump-sum investment.

Mutual Fund Returns Calculator

Calculate the estimated future value of a mutual fund lump-sum investment.

Future Value Calculator

Calculate what a present amount will be worth in the future at a given growth rate.

Present Value Calculator

Calculate what a future amount is worth in today's dollars, discounted at a given rate.

SWP Calculator

Calculate how long a lump-sum corpus lasts under a fixed monthly withdrawal plan.

Emergency Fund Calculator

Find your target emergency fund size based on monthly expenses and desired months of coverage.

Wedding Budget Calculator

Plan your monthly savings to reach a wedding budget goal by a target date.

Vacation Budget Calculator

Plan your monthly savings to reach a vacation budget goal by a target date.

ROI Calculator

Calculate the return on investment (ROI) percentage for any investment.

CAGR Calculator

Calculate the compound annual growth rate (CAGR) for any investment.

NPV Calculator

Calculate the net present value of a series of cash flows at any discount rate.

IRR Calculator

Calculate the internal rate of return for a series of cash flows.

XIRR Calculator

Calculate the annualized return for a series of cash flows.

Profit Calculator

Calculate profit, margin and markup from cost and revenue.

Profit Margin Calculator

Calculate profit margin percentage from cost and revenue.

Gross Margin Calculator

Calculate gross margin percentage from cost of goods sold and revenue.

Markup Calculator

Calculate markup percentage from cost and selling price.

Operating Margin Calculator

Calculate operating margin percentage from operating expenses and revenue.

EBITDA Calculator

Calculate EBITDA from net income, interest, taxes, depreciation and amortization.

Cost of Goods Sold Calculator

Calculate cost of goods sold (COGS) from beginning inventory, purchases and ending inventory.

Break-Even Calculator

Find exactly how many units you need to sell to cover fixed costs and break even.

Discount Calculator

Calculate the final price and savings after applying a percentage discount.

Sales Tax Calculator

Calculate the total price after adding sales tax.

VAT Calculator

Calculate the total price after adding VAT (Value Added Tax).

GST Calculator

Calculate the total price after adding GST (Goods and Services Tax).

Commission Calculator

Calculate commission earned on any sales amount and commission rate.

Salary Calculator

Convert between annual, monthly, weekly and hourly pay, plus an estimated take-home amount.

Take Home Salary Calculator

Estimate your take-home pay after taxes from your gross salary.

Hourly Wage Calculator

Convert an hourly wage into weekly, monthly and annual pay.

Annual Income Calculator

Convert an annual income into monthly, weekly and hourly figures.

Budget Calculator

Calculate your monthly surplus or deficit and savings rate from income and expenses.

Expense Calculator

Compare your income against your total expenses to find your monthly surplus or deficit.

Net Worth Calculator

Calculate your net worth by subtracting total liabilities from total assets.

Cash Flow Calculator

Calculate net cash flow from total cash inflows and outflows for any period.

Working Capital Calculator

Calculate working capital from current assets and current liabilities.

Current Ratio Calculator

Calculate the current ratio from current assets and current liabilities.

Debt-to-Income Ratio Calculator

Calculate your debt-to-income ratio from monthly debt payments and gross income.

Inventory Turnover Calculator

Calculate how many times per year inventory is sold and replaced.

Accounts Receivable Turnover Calculator

Calculate how many times per year receivables are collected.

Accounts Payable Days Calculator

Calculate the average number of days it takes to pay suppliers.

Inventory Days Calculator

Calculate the average number of days inventory sits before being sold.

Depreciation Calculator

Calculate annual and monthly depreciation for any asset using the straight-line method.

Dividend Yield Calculator

Calculate dividend yield percentage from annual dividend and stock price.

Stock Average Calculator

Calculate your average cost per share across multiple purchases.

Stock Profit Calculator

Calculate profit and percentage return from buying and selling shares.

Position Size Calculator

Calculate the correct trade position size based on account size and risk tolerance.

Risk/Reward Calculator

Calculate the risk/reward ratio for a trade from entry, stop-loss and target prices.

Inflation Calculator

Calculate the future cost of today's money after inflation.

Inflation-Adjusted Value Calculator

Calculate the inflation-adjusted future cost of an amount of money.

Purchasing Power Calculator

Calculate how much purchasing power your money loses to inflation over time.

Retirement Calculator

Calculate your retirement savings target and how long it takes to reach it.

Financial Independence (FIRE) Calculator

Calculate your FIRE number and how long it takes to reach financial independence.

Currency Converter

Convert between currencies using today's exchange rate, including provider fees.

Currency Exchange Fee Calculator

Calculate how much a currency exchange fee costs you on a conversion.

Tip Calculator

Calculate the tip amount and total for any bill.

Split Bill Calculator

Split a bill (with tip) evenly among any number of people.

Cashback Calculator

Calculate how much cashback you earn on any purchase.

APR Calculator

Calculate the effective annual yield (APY) from a nominal APR and compounding frequency.

APY Calculator

Calculate the effective annual yield (APY) from a nominal rate and compounding frequency.

Percentage Calculator

Calculate any percentage of any number, with the formula and worked examples.

Percentage of a Number Calculator

Find what a given percentage of any number is.

Percentage Increase Calculator

Calculate the percentage increase from an original value to a new value.

Percentage Decrease Calculator

Calculate the percentage decrease from an original value to a new value.

Percent Change Calculator

Calculate the percentage change (increase or decrease) between two values.

Percent Difference Calculator

Calculate the symmetric percent difference between two values, using their average as the base.

What Percent Is X of Y Calculator

Find out what percentage X is of Y.

X Is What Percent of Y Calculator

Find out what percentage X is of Y.

Reverse Percentage Calculator

Given a result and the percentage it represents, find the original number.

Percentage Discount Calculator

Calculate the final price and savings after applying a percentage discount.

Feet to Meters Calculator

Convert feet to meters instantly with the formula.

Meters to Feet Calculator

Convert meters to feet instantly with the formula.

Inches to Cm Calculator

Convert inches to centimeters instantly with the formula.

Cm to Inches Calculator

Convert centimeters to inches instantly with the formula.

Miles to Km Calculator

Convert miles to kilometers instantly with the formula.

Km to Miles Calculator

Convert kilometers to miles instantly with the formula.

Yards to Meters Calculator

Convert yards to meters instantly with the formula.

Mm to Inches Calculator

Convert millimeters to inches instantly with the formula.

Length Converter

Convert between any length units: meters, feet, inches, miles, km, yards, cm, mm and more.

Kg to Lbs Calculator

Convert kilograms to pounds instantly with the formula.

Lbs to Kg Calculator

Convert pounds to kilograms instantly with the formula.

Grams to Ounces Calculator

Convert grams to ounces instantly with the formula.

Ounces to Grams Calculator

Convert ounces to grams instantly with the formula.

Stone to Kg Calculator

Convert stone to kilograms instantly with the formula.

Tons to Kg Calculator

Convert metric tons to kilograms instantly with the formula.

Weight Converter

Convert between any weight units: kg, pounds, grams, ounces, stone, tons and more.

Liters to Gallons Calculator

Convert liters to gallons instantly with the formula.

Gallons to Liters Calculator

Convert gallons to liters instantly with the formula.

Ml to Fl Oz Calculator

Convert milliliters to fluid ounces instantly with the formula.

Cups to Ml Calculator

Convert cups to milliliters instantly with the formula.

Pints to Liters Calculator

Convert pints to liters instantly with the formula.

Quarts to Liters Calculator

Convert quarts to liters instantly with the formula.

Volume Converter

Convert between any volume units: liters, gallons, ml, cups, pints, quarts and more.

Sq Feet to Sq Meters Calculator

Convert square feet to square meters instantly with the formula.

Acres to Hectares Calculator

Convert acres to hectares instantly with the formula.

Sq Km to Sq Miles Calculator

Convert square kilometers to square miles instantly with the formula.

Area Converter

Convert between any area units: square meters, square feet, acres, hectares and more.

Mph to Kmh Calculator

Convert mph to km/h instantly with the formula.

Kmh to Mph Calculator

Convert km/h to mph instantly with the formula.

Knots to Mph Calculator

Convert knots to mph instantly with the formula.

M/s to Mph Calculator

Convert meters per second to mph instantly with the formula.

Speed Converter

Convert between any speed units: mph, km/h, m/s, knots and more.

MB to GB Calculator

Convert megabytes to gigabytes instantly with the formula.

GB to TB Calculator

Convert gigabytes to terabytes instantly with the formula.

KB to MB Calculator

Convert kilobytes to megabytes instantly with the formula.

Bytes to KB Calculator

Convert bytes to kilobytes instantly with the formula.

Data Storage Converter

Convert between any data storage units: bytes, KB, MB, GB, TB and bits.

Calories to Joules Calculator

Convert calories to joules instantly with the formula.

Kwh to Joules Calculator

Convert kilowatt-hours to joules instantly with the formula.

BTU to Joules Calculator

Convert BTU to joules instantly with the formula.

Energy Converter

Convert between any energy units: joules, calories, kWh, BTU and more.

PSI to Bar Calculator

Convert PSI to bar instantly with the formula.

Atm to PSI Calculator

Convert atmospheres to PSI instantly with the formula.

Pressure Converter

Convert between any pressure units: psi, bar, pascal, atm, torr and more.

Watts to Horsepower Calculator

Convert watts to horsepower instantly with the formula.

Kw to Hp Calculator

Convert kilowatts to horsepower instantly with the formula.

Power Converter

Convert between any power units: watts, kilowatts, horsepower and more.

Degrees to Radians Calculator

Convert degrees to radians instantly with the formula.

Radians to Degrees Calculator

Convert radians to degrees instantly with the formula.

Angle Converter

Convert between degrees, radians and gradians.

Force Converter

Convert between force units: newtons, pound-force and kilogram-force.

Frequency Converter

Convert between frequency units: hertz, kilohertz, megahertz and gigahertz.

Celsius to Fahrenheit Calculator

Convert Celsius to Fahrenheit instantly with the formula.

Fahrenheit to Celsius Calculator

Convert Fahrenheit to Celsius instantly with the formula.

Celsius to Kelvin Calculator

Convert Celsius to Kelvin instantly with the formula.

Fahrenheit to Kelvin Calculator

Convert Fahrenheit to Kelvin instantly with the formula.

Temperature Converter

Convert between Celsius, Fahrenheit and Kelvin.

MPG to L/100km Calculator

Convert miles per gallon to liters per 100km instantly with the formula.

MPG to Km/L Calculator

Convert miles per gallon to km/L instantly with the formula.

Fuel Economy Converter

Convert fuel economy between MPG, L/100km and km/L.

Binary to Decimal Calculator

Convert binary numbers to decimal instantly.

Decimal to Binary Calculator

Convert decimal numbers to binary instantly.

Hex to Decimal Calculator

Convert hexadecimal numbers to decimal instantly.

Decimal to Hex Calculator

Convert decimal numbers to hexadecimal instantly.

Number Base Converter

Convert numbers between binary, decimal, hexadecimal and octal.

Roman Numeral Converter

Convert numbers to Roman numerals, or Roman numerals back to numbers.

Number to Words Converter

Convert any number into its full written-out English words form.

Words to Number Converter

Convert a written-out number in words back into digits.

Shoe Size Converter

Convert shoe sizes between US, UK and EU for men's and women's shoes.

Clothing Size Converter

Convert clothing sizes between US, UK and EU, including letter sizes.

BMI Calculator

Calculate your Body Mass Index from weight and height, with category and formula.

BMR Calculator

Calculate your Basal Metabolic Rate and daily calorie needs using the Mifflin-St Jeor formula.

Body Fat Percentage Calculator

Estimate your body fat percentage using the US Navy circumference method.

Ideal Weight Calculator

Estimate your ideal body weight from height using the Devine formula.

Calories Burned Calculator

Estimate calories burned for walking, running, cycling and other activities.

Water Intake Calculator

Calculate your recommended daily water intake based on body weight.

Target Heart Rate Calculator

Calculate your maximum heart rate and target training zones by age.

Waist-to-Hip Ratio Calculator

Calculate your waist-to-hip ratio and cardiovascular risk category.

Addition Calculator

Add two or more numbers together instantly.

Subtraction Calculator

Subtract one number from another instantly.

Multiplication Calculator

Multiply two or more numbers together instantly.

Division Calculator

Divide one number by another instantly.

Average Calculator

Find the average (mean) of a list of numbers.

Sum Calculator

Add up a list of numbers to find their total.

Difference Calculator

Find the difference between two numbers.

Square Calculator

Calculate the square of a number (n²).

Cube Calculator

Calculate the cube of a number (n³).

Square Root Calculator

Calculate the square root of a number.

Cube Root Calculator

Calculate the cube root of a number.

Power Calculator

Calculate a number raised to any power (exponent).

nth Root Calculator

Calculate the nth root of any number.

Reciprocal Calculator

Calculate the reciprocal (1/n) of a number.

Absolute Value Calculator

Calculate the absolute value of a number.

Opposite Number Calculator

Find the opposite (additive inverse) of a number.

Sign Calculator

Check whether a number is positive, negative or zero.

Decimal to Percentage Calculator

Convert a decimal number into a percentage.

Percentage to Decimal Calculator

Convert a percentage into its decimal form.

Prime Number Checker

Check whether a number is prime.

Next Prime Number Calculator

Find the next prime number after a given number.

Previous Prime Number Calculator

Find the previous prime number before a given number.

Prime Factorization Calculator

Break a number down into its prime factors.

Factors Calculator

Find all the factors of a number.

Common Factors Calculator

Find the common factors shared by two numbers.

GCD Calculator

Find the Greatest Common Divisor of two numbers.

LCM Calculator

Find the Least Common Multiple of two numbers.

Divisibility Checker

Check whether one number is evenly divisible by another.

Coprime Checker

Check whether two numbers are coprime (relatively prime).

Perfect Number Checker

Check whether a number is a perfect number.

Armstrong Number Checker

Check whether a number is an Armstrong number.

Palindrome Number Checker

Check whether a number reads the same forwards and backwards.

Fibonacci Number Checker

Check whether a number belongs to the Fibonacci sequence.

Even/Odd Checker

Check whether a number is even or odd.

Arithmetic Sequence Calculator

Generate an arithmetic sequence from a first term and common difference.

Geometric Sequence Calculator

Generate a geometric sequence from a first term and common ratio.

Fibonacci Sequence Calculator

Generate the first n numbers of the Fibonacci sequence.

Triangular Number Calculator

Calculate the nth triangular number.

Square Number Calculator

Calculate the nth square number.

Cube Number Calculator

Calculate the nth cube number.

Catalan Number Calculator

Calculate the nth Catalan number.

Pascal's Triangle Generator

Generate a row of Pascal's Triangle.

Fraction Simplifier

Simplify any fraction to its lowest terms.

Fraction Addition Calculator

Add two fractions together and simplify the result.

Fraction Subtraction Calculator

Subtract one fraction from another and simplify the result.

Fraction Multiplication Calculator

Multiply two fractions and simplify the result.

Fraction Division Calculator

Divide one fraction by another and simplify the result.

Mixed Number Calculator

Convert a mixed number into an improper fraction.

Decimal to Fraction Calculator

Convert a decimal number into a simplified fraction.

Fraction to Decimal Calculator

Convert a fraction into its decimal form.

Binary Calculator

Add, subtract or multiply binary numbers.

Binary Addition Calculator

Add two binary numbers together.

Binary Subtraction Calculator

Subtract one binary number from another.

Binary Multiplication Calculator

Multiply two binary numbers together.

Quadratic Equation Solver

Solve any quadratic equation of the form ax²+bx+c=0.

Linear Equation Solver

Solve a linear equation of the form ax+b=0.

Ratio Calculator

Simplify a ratio to its lowest terms.

Proportion Calculator

Solve a proportion equation for the missing value.

Slope Calculator

Calculate the slope between two points on a line.

Midpoint Calculator

Find the midpoint between two coordinate points.

Distance Between Points Calculator

Calculate the distance between two coordinate points.

Area Calculator

Calculate the area of rectangles, squares, circles and triangles.

Perimeter Calculator

Calculate the perimeter of rectangles, squares and circles.

Circle Calculator

Calculate the area and circumference of a circle.

Triangle Calculator

Calculate the area and perimeter of a triangle from its three sides.

Rectangle Calculator

Calculate the area and perimeter of a rectangle.

Square Calculator (Shape)

Calculate the area and perimeter of a square from its side length.

Trapezoid Calculator

Calculate the area of a trapezoid from its parallel sides and height.

Rhombus Calculator

Calculate the area of a rhombus from its diagonals.

Polygon Area Calculator

Calculate the area of a regular polygon from its sides and side length.

Mean Calculator

Calculate the mean (average) of a list of numbers.

Median Calculator

Calculate the median of a list of numbers.

Mode Calculator

Find the mode of a list of numbers.

Range Calculator

Calculate the range of a list of numbers.

Standard Deviation Calculator

Calculate the standard deviation of a list of numbers.

Variance Calculator

Calculate the variance of a list of numbers.

Probability Calculator

Calculate the probability of an event from favorable and total outcomes.

Permutation Calculator

Calculate the number of permutations (nPr).

Combination Calculator

Calculate the number of combinations (nCr).

Octal Converter

Convert numbers between octal, decimal, binary and hexadecimal.

Concrete Calculator

Calculate how much concrete you need in cubic yards and bags.

Mulch/Gravel Calculator

Calculate how much mulch or gravel you need in cubic yards.

Roofing Calculator

Calculate roofing squares and shingle bundles needed for your roof.

Paint Calculator

Calculate how many gallons of paint you need for your walls.

Flooring Calculator

Calculate how many boxes of flooring you need for a room.

Wallpaper Calculator

Calculate how many rolls of wallpaper you need for your walls.

Board Feet Calculator

Calculate the board feet of a piece of lumber from its dimensions.

Car Loan Calculator

Calculate your monthly car loan payment including down payment and trade-in.

Lease Payment Calculator

Calculate your monthly car lease payment from MSRP and residual value.

Fuel Cost for a Trip Calculator

Calculate how much fuel a road trip will cost.

Tire Size Calculator

Compare two tire sizes and see the difference in diameter and speedometer accuracy.

GPA Calculator

Calculate your GPA from grade points and credit hours.

Grade Calculator

Calculate your weighted grade from assignment scores and weights.

Final Exam Grade Calculator

Calculate the exam score you need to reach your target grade.

Letter Grade Calculator

Convert a percentage score into a letter grade.

Grade Curve Calculator

Calculate a curved score from a raw score and curve amount.

Ohm's Law Calculator

Calculate voltage, current or resistance using Ohm's Law.

Speed, Distance & Time Calculator

Calculate speed, distance or time from the other two values.

Force Calculator

Calculate force from mass and acceleration (F=ma).

Density Calculator

Calculate density from mass and volume.

Molarity Calculator

Calculate the molarity of a solution from moles and volume.

Kinetic Energy Calculator

Calculate kinetic energy from mass and velocity.

Recipe Scale Conversion Calculator

Paste a full recipe's ingredient list and scale every quantity up or down, by a multiplier or by servings.

Oven Temperature Converter

Convert oven temperatures between Fahrenheit, Celsius, fan Celsius and gas mark, with a full reference chart.

Baking Ratio Calculator

Calculate ingredient amounts using baker's percentages.

Cooking Measurement Converter

Convert between cups, tablespoons, teaspoons and milliliters, across US, UK and metric measurements.

Running Pace Calculator

Calculate your running pace per km and per mile from distance and time.

One-Rep Max Calculator

Estimate your one-rep max from a weight and rep count.

VO2 Max Calculator

Estimate your VO2 max from resting and maximum heart rate.

Rent vs Buy Calculator

Compare the total cost of renting versus buying a home over time.

Refinance Break-Even Calculator

Calculate how many months until refinancing pays for itself.

Property Tax Calculator

Calculate your annual and monthly property tax from home value and tax rate.

Random Number Generator

Generate a random number between any two values.

Dice Roller

Roll any number of virtual dice with any number of sides.

Coin Flip Simulator

Flip one or more virtual coins online.

Word & Character Counter

Count words, characters and sentences in any text.