Pregnancy Week Calculator
Enter your due date to see how far along you are in weeks and days, how long is left, and which trimester you are in.
Type a number and the answer appears straight away.
Your answer
The math behind it: Pregnancy
weeks pregnant = (today - (due date - 280 days)) / 7
Pregnancy is counted from the first day of the last period, about two weeks before conception. The first trimester runs to the end of week 12, the second to the end of week 26, and the third until birth.
You might also need
Checked and updated: