Pregnancy Calculator
Estimate how many weeks pregnant you are and calculate your due date.
How it Works
Pregnancy is usually counted from the first day of your last period (LMP) and lasts ~40 weeks.
Formula: Due Date = LMP + 280 days (40 weeks)
Weeks Pregnant: (Today − LMP) ÷ 7
Step-by-Step Usage Guide
- Enter the first day of your last menstrual period.
- Click Calculate.
- View estimated due date and pregnancy weeks.
FAQs
What is a pregnancy calculator?
It estimates how many weeks pregnant you are and your expected due date based on your last period.
How do you calculate weeks pregnant?
Subtract your LMP from today and divide by 7.
What is the due date?
The estimated day your baby is expected, ~40 weeks from LMP.
Can this tell when to take a test?
Yes, it can suggest the earliest reliable test date.