About Our Pregnancy Due Date Calculator
Our advanced pregnancy calculator helps expecting parents estimate their baby's due date with three medically-approved methods:
1. Last Menstrual Period (LMP)
The most common method used by healthcare providers. Calculates 40 weeks from the first day of your last period.
2. Conception Date
For when you know the conception date. Adds 38 weeks (266 days) to the conception date.
3. Ultrasound Dating
The most accurate method, especially when done in the first trimester.
Key Features
- Accurate due date estimation
- Week-by-week pregnancy tracking
- Trimester breakdown
- Mobile-friendly design
- No registration required
Frequently Asked Questions
How accurate are due date calculators?
Only about 5% of women deliver on their exact due date. First trimester ultrasounds are most accurate (±5-7 days).
What if my cycles are irregular?
Our calculator allows you to adjust for your specific cycle length for more accurate results.
Can I use this for IVF pregnancies?
Yes! Use the conception date method with your embryo transfer date plus 14 days.