Pregnancy Due Date Calculator
Estimate the due date from the last menstrual period or conception date.
Instant · runs in your browserAbout the Due Date Calculator
Estimate when your baby is due from the first day of your last menstrual period (LMP) or the date of conception. The tool also shows how far along you are today.
How it works
Using Naegele's rule, the due date is about 280 days (40 weeks) after the first day of the last period, assuming a 28-day cycle. You can adjust for a longer or shorter cycle.
Good to know
Only a small share of babies arrive exactly on the due date. Your doctor or midwife may adjust it after an ultrasound scan.
زچگی کی متوقع تاریخ
آخری ماہواری کے پہلے دن سے تقریباً 280 دن (40 ہفتے) بعد متوقع تاریخ ہوتی ہے۔ یہ ٹول آج تک کے ہفتے بھی دکھاتا ہے۔
- سائیکل کی لمبائی کے مطابق تبدیلی
- الٹراساؤنڈ کے بعد ڈاکٹر تاریخ بدل سکتی ہے
How to use Pregnancy Due Date Calculator
- Enter your values. Units and defaults are shown beside each field.
- Press Calculate (results also update as you type once calculated).
- Read the result and the step-by-step breakdown with the formula used.
- Copy the result or reset to start again.
Frequently asked questions
How accurate is this calculator?
Calculations use the standard formulas shown on the page, computed in full precision and rounded only for display. The result is only as accurate as the inputs and assumptions listed.
Is this medical advice?
No. Health calculators give general estimates for information only and are not a diagnosis. Speak to a qualified health professional about your situation.
Is it free?
Yes. All tools are free to use without an account.