Due Date Calculator

Calculate your baby's estimated due date, pregnancy week, and trimester using your last menstrual period or conception date.

 

Due Date Calculator

Calculate your due date, conception date, and pregnancy milestones

Last Menstrual Period (LMP)

First day of your last period

Conception Date

Date of conception (if known)

Current Date

Today's date for calculation

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Estimated Due Date

—

— days remaining

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Conception Date

—

Estimated

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Pregnancy Progress

0 weeks

0 days pregnant

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Trimester

—

—

Important Dates

About Due Date Calculation

• Naegele's Rule: Add 280 days (40 weeks) to the first day of your LMP
• Conception: Typically occurs about 14 days after LMP
• Full term: 39-40 weeks; Early term: 37-38 weeks
• Only 5% of babies are born on their exact due date
• Normal range: 37-42 weeks is considered full term

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