Pregnancy Due Date Calculator
Estimate your baby’s due date using LMP, conception date, or ultrasound. Backed by medical guidelines and reviewed content.
- 🧮 Accurate estimate in seconds
- 📅 Week-by-week milestones
- 🩺 Medically reviewed information
Pregnancy Due Date Calculator
Use our advanced calculator to estimate your due date, track your baby’s growth week by week, and get personalized pregnancy insights.
Choose Calculation Method
How Our Pregnancy Calculator Works
Our tool uses standard obstetric calculations to estimate your due date over a typical 40-week pregnancy. Enter your last menstrual period (LMP), exact conception date, or an early ultrasound date. For irregular cycles, adjust your average cycle length for a better estimate.
Learn more in our guides: due date accuracy, pregnancy symptoms week by week, and ultrasound dating.
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Frequently Asked Questions
How accurate is a pregnancy due date calculator?
It provides an estimate. Most babies arrive within about 1–2 weeks of the predicted date. An early ultrasound can improve accuracy.
Can I use the calculator with irregular cycles?
Yes—adjust the average cycle length to get a better estimate, and confirm with your healthcare provider.
Which is most reliable: LMP, conception, or ultrasound?
Early ultrasound (8–12 weeks) is typically the most accurate method for dating a pregnancy.