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Due Date Calculator

Estimate a due date from a last period, conception date, or current pregnancy week.

Known date
days
Estimated due date
July 19, 2027
40 weeks from the adjusted last menstrual period
Estimated conceptionOctober 26, 2026
Estimated gestational age today0 weeks 0 days
Days until due date280
Cycle length used28 days

A pregnancy due date is an estimate. Ultrasound and clinical assessment may revise it. Estimates for general guidance only — not medical advice. Check with a qualified healthcare professional for personal decisions.

About the Due Date Calculator

Estimate a due date from a last period, conception date, or current pregnancy week.

It runs entirely in your browser — nothing you type is sent to a server — and the result updates as you edit the inputs. Estimates are for educational and informational purposes only; see ourdisclaimer.

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Related calculators

Pregnancy CalculatorEstimate due date, current gestational age, and ovulation from the last period date.Pregnancy Conception CalculatorEstimate conception timing from an estimated due date and average cycle length.

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