Pregnancy Due Date Calculator

Estimate your expected due date using the first day of your last menstrual period and your typical cycle length. This is a general estimate and does not replace medical advice from a healthcare professional.

Estimate your due date

By default, this calculator uses Naegele’s rule (280 days from the first day of your last period), adjusted for cycle lengths different from 28 days.

First day of last menstrual period (LMP)

Typical cycle length (days)

Leave blank or use 28 if you’re not sure. If your cycle is longer than 28 days, your estimated due date may be slightly later.

Select the first day of your last period, optionally adjust your cycle length, then tap “Calculate Due Date”.

Disclaimer: This calculator provides an estimate for informational purposes only and does not constitute medical advice. Always consult a qualified healthcare provider for personalized information.

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