Pregnancy Due Date Calculator

Find out when your baby is due 🤰

Your Due Date January 1, 2026
0 Weeks Pregnant
1st Trimester
280 Days Until Due

Key Milestones

1st Trimester Ends:
2nd Trimester Ends:
Full Term (37 weeks):
🔬Medically Accurate
🎁100% Free
🔒Private
📱Mobile Friendly

Frequently Asked Questions

How is the due date calculated?

We use Naegele's rule: add 280 days (40 weeks) to the first day of your last menstrual period, or 266 days from conception date.

How accurate is the due date?

Only about 5% of babies arrive on their exact due date. Most are born within 2 weeks before or after. It's an estimate, not a guarantee.

What if I don't know my last period?

Use the conception date option if you know when you conceived, or consult your doctor for an ultrasound-based estimate.

When do trimesters start and end?

1st trimester: weeks 1-12. 2nd trimester: weeks 13-27. 3rd trimester: weeks 28-40. Each has different developmental milestones.

What is full term pregnancy?

Full term is 37-40 weeks. Before 37 weeks is preterm. Babies born at 39+ weeks generally have better outcomes.

Is this medical advice?

No, this is for informational purposes only. Always consult your healthcare provider for medical advice about your pregnancy.