0 Weeks 0 Days Pregnant
Based on a last menstrual period of November 20, 2026, you're currently 0 weeks, 0 days pregnant (First trimester). Estimated due date: August 27, 2027.
How This Works
This uses Naegele's rule, the standard obstetric estimate: due date = first day of your last menstrual period + 280 days (40 weeks). It's an estimate based on averages, not a medical prediction — actual delivery timing varies and should be confirmed with your healthcare provider, especially if using ultrasound dating.
Formula
Example
A last menstrual period of January 1, 2026 gives an estimated due date of October 8, 2026.
Frequently Asked Questions
What is the due date for a last period starting November 20, 2026?
The estimated due date is August 27, 2027, using Naegele's rule (LMP + 280 days).
How many weeks pregnant does that make me today?
0 weeks and 0 days, in the first trimester.
Is this a medical prediction?
No — this is a standard estimate based on averages. Always confirm your due date and gestational age with your healthcare provider.