Pregnancy Calculator

Calculate your due date, current gestational week, and key pregnancy milestones based on your last menstrual period.

📋 Data Entry

First day of last menstrual period

Or — Ultrasound date

Gestational age at ultrasound (weeks)

📄 Result

Result

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⚠️ For medical purposes only. Always confirm dates with your OB-GYN or midwife.

About this calculator

Pregnancy duration is typically 40 weeks (280 days) from the first day of the last menstrual period (LMP), or 38 weeks from conception. The due date is an estimate — only 5% of babies are born exactly on their due date.

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