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Home/Fitness & Health/Pregnancy Calculator

Pregnancy Calculator

Calculate pregnancy due date and weeks

calculators.pregnancy.lastMenstrualPeriod

Fitness & Health

View All Fitness & Health →

Written by the EachTools Team

Last updated: January 2026

How Pregnancy Dates Are Calculated

Pregnancy is typically dated from the first day of the last menstrual period (LMP), making the estimated gestational age about 40 weeks (280 days).

Steps

Enter the first day of your last menstrual period.
View your current gestational age in weeks and days.
See estimated due date and key pregnancy milestones.