Gestational Age Calculator

Calculate your current pregnancy week and estimated due date from your last menstrual period (LMP). Pregnancy tracker with trimester info.

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Gestational Age Calculator

Calculate your current pregnancy week and estimated due date based on your last menstrual period (LMP). This tool uses the standard 280-day obstetric calculation.

🔒 Client-side only⚡ Web Worker processing🌐 Works offline🛡️ Zero server logs

How to Use

  1. Enter the first day of your last menstrual period (LMP).
  2. Your current gestational age in weeks and days is calculated.
  3. The estimated due date (EDD) and trimester are displayed.

Frequently Asked Questions

Got questions about pregnancy? We've got answers.

Why start from my last period?

Because the exact date of conception is often unknown, LMP is the standard medical reference point for calculating gestational age.

What is considered full term?

A pregnancy is considered full term at 39 weeks. Babies born before 37 weeks are considered preterm.

How many days is a typical pregnancy?

The average pregnancy is 280 days (40 weeks) from the first day of the LMP.

Tool Changelog & Updates

1.0.02026-07-02
  • Feature: Initial release of Gestational Age