Calculators

Pregnancy Due Date Calculator

Estimate due date from last period.

Estimate based on

First day of last periodAverage cycle length (days)

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estimated due date

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Current week

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Trimester

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Est. conception

Milestones

This free pregnancy due date calculator estimates your baby's due date from your last menstrual period, conception date, IVF transfer date, or an ultrasound measurement. It also shows the current pregnancy week and trimester, estimated conception date, a countdown, and key milestones like the end of each trimester, viability and full term. This is an estimate — only a small share of babies arrive exactly on the due date. All calculations complete instantly.