Calculator
Pregnancy week calculator
Calculate completed weeks from LMP or dating established in prenatal care.
Open toolPregnancy and family
Pregnancy and family calculators
Indicative pregnancy and cycle dates that do not replace medical assessment.
3published tools
Local processingPrivate by default
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Calculator
Estimated due date calculator
Estimate a due date from a regular cycle, known fertilisation or IVF transfer.
Open toolCalculator
Fertile-window calculator — calendar scenario
Explore calendar variability without identifying contraceptive “safe days”.
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