Free calculatorsPregnancy & cycle
Pregnancy and cycle calculators place dates and periods on a calendar using information you already know. They estimate upcoming periods, an ovulation window, a delay, due or conception dates, and convert weeks from last period, pregnancy weeks and months. Simply choose the subcategory that interests you, then open the tool you need.
Cycle & ovulation
Place periods, ovulation window and delay on an indicative calendar.
Pregnancy dates
Estimate due and conception dates, then estimate the pregnancy stage in weeks and months.
Pregnancy Due Date Calculator
Estimate your due date from the last period and usual cycle length. Pregnancy care may adjust this initial date.
Conception Date Calculator
Estimate a conception date from the expected due date. This calendar reference cannot establish the actual date with certainty.
Pregnancy Weeks Calculator
Estimate pregnancy weeks counted from the last period and since conception using a reference date, with weeks and days.
Pregnancy Month & Trimester Calculator
Estimate the pregnancy month and trimester from the last period and chosen reference date.