← All tools
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.
01
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.
What’s next
Keep planning
All 4 calculation methods, explainedNaegele, conception, IVF, ultrasound — and why your date can move.Experience a live revealThe RevealTogether moment exactly as your guests will see it — 60 seconds.Ways to fill the 18–22 windowDozens of reveal ideas sorted by style, budget and distance.Plan the birth announcementKeep the name and photo private until the chosen moment, then share the news with family.