Due Date Calculator
Calculate your pregnancy due date based on your last menstrual period and track your pregnancy week by week.
Frequently Asked Questions
How accurate is this calculator?
This calculator uses the standard 280-day (40-week) pregnancy from the last menstrual period. Only about 4% of babies are born on their exact due date, with most being born within 2 weeks before or after.
When should I have my first ultrasound?
Most women have their first ultrasound between weeks 8-14 of pregnancy. This dating ultrasound can provide a more accurate due date.
What are the trimesters?
First trimester: weeks 1-12, Second trimester: weeks 13-26, Third trimester: weeks 27-40.