🤰 PregnancyNaegele's Rule

Pregnancy Due Date Calculator

Estimate your baby's due date from your last menstrual period or conception date. See gestational age, current trimester and all key pregnancy milestones.

Calculate From

First Day of Last Period

Average Cycle Length

days

Note: This estimate uses Naegele's Rule: LMP + 280 days. Actual birth can vary by 2 weeks either side. Only ultrasound can confirm gestational age precisely. Consult your OB-GYN.

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Enter your last period date

We use Naegele's rule (LMP + 280 days) to estimate your due date.

Pregnancy Due Date Calculator

Key Milestones