Pregnancy Due Date Calculator
Your estimated delivery date and current pregnancy week
What this tool is for
Enter the first day of your last period to get an estimated delivery date (EDD), how many weeks along you are today, which trimester you are in, and when each checkup is due.
Your result
Naegele's rule (LMP + 280 days), ACOG guidance on pregnancy dating, and the WHO 2016 eight-contact antenatal care model.
This tool is for general information only. It does not diagnose anything and it is not a substitute for a doctor's advice. If something is wrong or worrying you, please speak to a registered doctor.
Everything you enter is calculated in your own browser. Nothing is saved and nothing is sent anywhere.
Related specialists
If you want to talk your result through, these are the specialists to see.
Common questions
280 days (40 weeks) are added to the first day of your last period. This is Naegele's rule. It assumes a 28-day cycle, so if yours is longer or shorter the date is shifted by the difference.
Usually not. About 1 baby in 20 arrives on the estimated date and the rest come earlier or later. Birth between 37 and 42 weeks is considered normal. Treat the date as a window, not a fixed day.
Then this calculation will not be reliable. An ultrasound is the only dependable alternative, and one done in the first three months gives the most accurate date. Please see a gynaecologist soon.
Since 2016 the World Health Organization has recommended at least 8 antenatal contacts. Bangladesh's national guideline sets a minimum of 4, but more visits are better, especially with high blood pressure or diabetes.