Pregnancy Calculator
Estimate your due date and current week of pregnancy based on the first day of your last period or a known conception date.
About the Pregnancy Calculator
A pregnancy calculator estimates your due date and current week of pregnancy based on the first day of your last menstrual period or your conception date.
How to use
1
Enter the first day of your last menstrual period, or your known conception date.
2
View your estimated due date and current week of pregnancy.
3
Check back periodically as your pregnancy progresses.
Frequently asked questions
How accurate is the estimated due date?
This gives a standard estimate based on an average 40-week pregnancy, but only a small percentage of babies are born on their exact estimated due date, so treat it as a general guide.
Should I use this instead of consulting my doctor?
No, this is a general estimation tool. Your doctor or midwife can give a more precise estimate based on ultrasound measurements and your individual medical history.
Explore more tools in the Calculators category.