Pregnancy Due Date Calculator
Calculate your pregnancy due date and key milestone weeks.
How to Use Pregnancy Due Date Calculator
- 1Choose your calculation method: Last Menstrual Period, Conception Date, or IVF Transfer Date.
- 2Enter the relevant date and any additional settings (cycle length, embryo age).
- 3See your estimated due date, current pregnancy week, trimester, and key milestone dates.
Frequently Asked Questions
How accurate is the due date?
The LMP method (Naegele's Rule) is the standard clinical method — accurate within 1–2 weeks for most pregnancies. Ultrasound dating in the first trimester is more precise.
What is Naegele's Rule?
Add 280 days (40 weeks) to the first day of the last menstrual period, adjusted for cycle length if it differs from 28 days.
Only 5% of babies are born on their due date — why use this calculator?
The due date establishes a reference point for scheduling prenatal care and monitoring development. Most births occur within 2 weeks of the EDD.
About Pregnancy Due Date Calculator
Our Pregnancy Due Date Calculator supports three calculation methods used by healthcare providers — LMP (Naegele's Rule), conception date, and IVF transfer date. It also shows your current week, trimester, and a timeline of key prenatal milestones.
This calculator is for informational purposes only. Always consult your obstetrician or midwife for personalised medical guidance.