Health

Pregnancy Due Date Calculator

Enter the first day of the last period. The due date is 280 days later.

How it works

Choose the first day of your last period.
Press Calculate.
See your estimated due date and how far along you are.

Good to know

The due date is 280 days (40 weeks) after the first day of your last period.
It assumes a 28-day cycle. If your cycle is shorter or longer, the real date may differ.
A date from a dating scan, midwife, or doctor is more accurate than this estimate.
The date must be in the past and within the last two years.
Most babies arrive a few weeks either side of the due date.

100% client-side processing. No file uploads. No data stored.

Questions

What if my cycle is not 28 days?: Move the date by the difference. With a 32-day cycle, the due date is about 4 days later.
Is the date I enter saved?: No. It is used in your browser to work out the result. Nothing is sent or saved.