Pregnancy Due Date Calculator

Estimate your due date and track key pregnancy milestones

Method

Date

Transfer Type

Estimated Due Date

Current Week

Days Remaining

Trimester

// Naegele's Rule

The standard method: add 280 days (40 weeks) to the first day of your last menstrual period. Only ~5% of babies arrive on the exact due date — most come within 2 weeks either side.

// IVF Dating

For IVF pregnancies, the due date is calculated from the transfer date, adjusted for embryo age. Day 5 transfers are 2 days further along than Day 3 at the time of transfer.

// Trimester Guide

1st (wk 1-12): organs form, morning sickness common. 2nd (wk 13-26): baby grows, energy returns. 3rd (wk 27-40): rapid growth, preparation for birth.

// Key Milestones

Week 12: first scan. Week 20: anatomy scan. Week 24: viability milestone. Week 37: full term. Your healthcare provider may adjust dates based on ultrasound measurements.