Simple Calcs

Pregnancy Due Date Calculator

Calculate your estimated due date and track your pregnancy journey week by week.

Calculate Based On

First Day of Last Period

First day of your last menstrual period

Average Cycle Length (days)

28 days is average, adjust if yours differs

Note: This calculator provides estimates based on standard pregnancy duration (40 weeks from last menstrual period). Only your healthcare provider can give you an accurate due date through examination and ultrasound.

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Calculate Your Pregnancy Timeline

Enter your information to see your estimated due date, current pregnancy week, important milestones, and baby's development.

Understanding Your Pregnancy Timeline

How Pregnancy Dating Works

40 Weeks: Pregnancy lasts about 40 weeks from the first day of your last menstrual period
Conception Date: Typically occurs about 14 days after your last period begins
Trimesters: Pregnancy is divided into three trimesters of roughly 13-14 weeks each
Full Term: Babies born between 37-42 weeks are considered full term
Only 5% Born on Due Date: Most babies arrive within 2 weeks before or after the estimated date

Important Reminders

This calculator provides estimates based on standard pregnancy duration
Your healthcare provider will give you the most accurate due date through ultrasound
Due dates can be adjusted based on ultrasound measurements
First-time mothers often deliver after their due date
Always consult your doctor or midwife for prenatal care and guidance