UZI TOOLS

Pregnancy Due Date Calculator

Estimate your baby's due date from the first day of your last menstrual period.

Pregnancy Due Date Calculator calculator

Enter the first day of your last menstrual period (LMP). The due date is estimated using Naegele's rule (40 weeks from LMP). Only a healthcare provider can confirm your due date.

Estimated due date: Wed, Oct 22, 2025

126 days ago · ~58 weeks along (if LMP is correct)

How To Use

  1. Enter the first day of your last menstrual period (LMP).
  2. Review the estimated due date (40 weeks from LMP, Naegele's rule).
  3. Use Example to load a sample date, or Reset to clear.

What Is Pregnancy Due Date?

A pregnancy due date calculator estimates when your baby is likely to be born based on the first day of your last menstrual period (LMP). The most common method is Naegele's rule: LMP plus one year, minus three months, plus seven days— about 40 weeks. Only a healthcare provider can confirm your due date, especially with an early ultrasound. Most babies arrive within two weeks before or after the estimated date.

Frequently Asked Questions

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