If you already know how many weeks and days pregnant you are, for example from an ultrasound, enter them here. The calculator gives your trimester, estimated due date and an approximate number of months.
How to use it
- Enter the weeks you are pregnant.
- Add any extra days.
- Read your trimester, due date and months.
Questions about this tool
How many weeks is a full pregnancy?
About 40 weeks counted from the first day of the last period.
Why are months approximate?
Pregnancy is counted in weeks, and months vary in length, so the month figure is only a guide.