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Free due date calculator
When is your baby due?
Choose the date you know. We’ll estimate your due date, map the 40 weeks and show your best reveal window.
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Which date do you know?
Your dates stay on this device.
Frequently Asked Questions
How do I calculate my due date?
Add 280 days (40 weeks) to the first day of your last menstrual period. Our calculator does this automatically.
When can I find out my baby's gender?
Gender can typically be determined between 18-22 weeks via ultrasound, or as early as 10 weeks with NIPT testing.
Is my due date accurate?
Only about 5% of babies are born on their due date. Most are born within a 2-week window before or after.
Medical Disclaimer. This calculator provides estimates only. Please consult your healthcare provider for accurate dating and medical advice.
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