Is this calculator a substitute for medical advice?

No. The calculator is for informational purposes only and cannot replace personalised advice from qualified healthcare professionals.

Pregnancy Due Date Calculator | EDD & Gestational Age

Q: How is the due date calculated?

We apply Naegele's rule for LMP (280 days), a 266-day interval from conception or IVF transfer, and adjust ultrasound dates based on the gestational age reported at the scan.

Enter your timeline

Select one calculation method. Dates are treated in UTC to avoid daylight saving time drift.

LMP date

Cycle length (days)

Default is 28 days; adjust if your luteal phase differs.

Conception date

Transfer date

Embryo age (days)

Day-3 or Day-5 transfers are most common. You can enter any value from 1 to 6.

Scan date

GA weeks

GA days

Results

Enter your dates above and press calculate to see your estimated due date and milestones.

For information only; not a medical diagnosis. Speak with your clinician for personalised guidance.

FAQ

How is the due date calculated?

The calculator applies Naegele’s rule (280 days from LMP), counts 266 days from conception or embryo transfer, and offsets ultrasound scans by subtracting the gestational age measured at the appointment.

Can I rely on this as medical advice?

No. Only a qualified healthcare professional can provide personalised medical advice. Use this tool as a planning guide and confirm all questions with your care team.

Pregnancy Due Date Calculator

Enter your timeline

Results

Estimated Due Date (EDD)

Gestational age today

Equivalent dates

Key milestones

FAQ

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