The Pregnancy Calculator estimates your due date and tracks your progress. Find out how many weeks pregnant you are, which trimester you are in, and the key milestones ahead.
How to use the pregnancy calculator
- Enter the first day of your last period, or your due date.
- Calculate.
- See your estimated due date.
- Check your current week and trimester.
Why estimate your due date
Knowing your due date helps you plan checkups, prepare for the baby, and follow each stage of the pregnancy. It gives a helpful timeline for the weeks and months of growth ahead.
A helpful guide
This calculator gives an estimate based on common pregnancy length. Every pregnancy is different, so your doctor may adjust the date after a scan. Use it as a friendly guide and follow your doctor for medical advice.