Pregnancy Due Date Calculator

Estimate your baby’s due date, pregnancy week, trimester, and key pregnancy milestones.

First Day of Last Menstrual Period Average Menstrual Cycle Length 21 days 22 days 23 days 24 days 25 days 26 days 27 days 28 days 29 days 30 days 31 days 32 days 33 days 34 days 35 days

Please enter the first day of your last menstrual period.

Your Pregnancy Estimate

Estimated Due Date:

Pregnancy Age:

Current Trimester:

Estimated Conception Window:

Important Milestones

End of First Trimester:

Start of Second Trimester:

Start of Third Trimester:

Full-Term Period Begins:

What Does a Due Date Mean?

A pregnancy due date is an estimated date when your baby may be born. It is usually calculated by adding about 40 weeks, or 280 days, to the first day of your last menstrual period.

Why Your Due Date May Change

Your healthcare provider may adjust your due date after an ultrasound, especially during early pregnancy. This is because ultrasound measurements can give a more accurate estimate of your baby’s growth and pregnancy age.

Medical Disclaimer

This calculator gives an estimate only and should not replace medical advice. Please speak with a qualified healthcare professional for proper pregnancy care, scans, and medical guidance.