Pregnancy Calculator

Table of Contents

Calculate Based On:

This is not a diagnosis. The calculations that are provided are estimates based on averages.

How to Use the Pregnancy Calculator

Enter the first day of your last menstrual period (LMP) and your cycle length. The calculator will estimate your due date and pregnancy week.

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Pregnancy Due Date Calculator

A pregnancy due date calculator estimates when your baby is likely to be born. Most pregnancies last about 40 weeks (280 days) from the first day of the last menstrual period.

How Many Weeks Pregnant Am I

Tracking pregnancy weeks helps you understand your baby’s development and your current trimester. Pregnancy is divided into three stages:

First Trimester: Week 1–12
Second Trimester: Week 13–26
Third Trimester: Week 27–40

Pregnancy Calculator by Last Menstrual Period

Doctors usually calculate pregnancy from the first day of the last menstrual period (LMP). This method provides the most accurate estimate for the due date.

Calculator Form

Input Fields

First Day of Last Period (Date Picker)
Average Cycle Length (Default 28 days)

Calculate Button

Results Section

After calculation show:

Estimated Due Date
Current Pregnancy Week
Current Trimester
Estimated Conception Date

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