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👶Pregnancy Calculator

Calculate Due Date

Calculate due date and pregnancy timeline

Pregnancy Details

Enter last menstrual period date

Pregnancy Summary

Pregnancy calculated. Due date: 6/4/2026, 12 weeks pregnant

Due Date

6/4/2026

Weeks Pregnant

12 weeks

Trimester

First Trimester

Days Remaining

189 days

About Pregnancy Calculator

A pregnancy calculator helps you calculate your due date based on your last menstrual period (LMP). It also shows your current week of pregnancy, trimester, and days remaining until your due date.

Pregnancy Trimesters

  • First Trimester: Weeks 1-12
  • Second Trimester: Weeks 13-27
  • Third Trimester: Weeks 28-40

Frequently Asked Questions

Due date is typically calculated by adding 280 days (40 weeks) to the first day of your last menstrual period (LMP). This is known as Naegele's rule.

LMP (Last Menstrual Period) is the first day of your last period, while conception date is when fertilization occurs. Conception usually happens about 2 weeks after LMP.

Due date calculators provide an estimated due date. Only about 5% of babies are born on the exact due date. Most babies are born within 2 weeks before or after the due date.

First trimester: Weeks 1-12, Second trimester: Weeks 13-27, Third trimester: Weeks 28-40. Each trimester has different developmental milestones and symptoms.