Daily life & Islamic
Pregnancy Due Date Calculator
Estimate your baby's due date. Enter the first day of your last menstrual period, the conception date or an IVF transfer date, and adjust for your cycle length. See your estimated due date, how far along you are, your trimester and dates for common checkups.
How to use the Pregnancy Due Date Calculator
- Choose what you know: last period, conception or IVF.
- Enter the date.
- Adjust cycle length if it is not 28 days.
- Read your due date and milestones.
Formula
Example
If your last period started on September 8, 2026 with a 28-day cycle, your estimated due date is June 15, 2027.
Good to know
Only about 4-5% of babies are born on their due date. Most arrive between 37 and 42 weeks. Your provider may update the date after an early ultrasound.
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Frequently asked questions
Is the due date exact?
No - it is an estimate.
What is gestational age?
Weeks counted from the first day of your last period.
Why IVF day 3 vs day 5?
The embryo's age at transfer changes the calculation.
Is this medical advice?
No. Follow your doctor's or midwife's guidance.
This tool gives general information, not medical advice. Talk to your doctor or another qualified health professional about your own situation. Your inputs stay in your browser.
Last updated: November 2026