Pregnancy & Cycle Calculators
Pregnancy and cycle calculators help you plan with dates. Estimate a due date, find how many weeks pregnant you are, and estimate ovulation and period dates from your cycle. Dates are estimates, and cycles and pregnancies vary, so confirm anything important with your doctor or midwife.
Last updated October 23, 2026
All Pregnancy & Cycles tools
Health & Fitness · Pregnancy & Cycles
Ovulation CalculatorEstimated ovulation day and fertile window from cycle length
Health & Fitness · Pregnancy & Cycles
Period CalculatorEstimated dates of upcoming menstrual periods
Health & Fitness · Pregnancy & Cycles
Due Date CalculatorDue date from last period, conception, IVF transfer or ultrasound
Health & Fitness · Pregnancy & Cycles
Pregnancy CalculatorDue date, weeks pregnant, trimester and milestone dates
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