Fertility calculators and tools
Ovulation, DPO and due date calculators, and the 2-minute quiz.
Calculators
ToolWait
DPO Calculator
Free DPO calculator: find how many days past ovulation you are, when implantation usually happens, and the earliest and most reliable days to take a pregnancy test.
ToolPregnant
Due Date Calculator
Free due date calculator using Naegele's rule and ACOG IVF dating: estimate your due date from your last period, conception or a day-3 or day-5 transfer.
ToolTry
Ovulation Calculator
Free ovulation calculator: estimate your ovulation day and fertile window for the next 3 cycles, with a day-by-day table for 21 to 35-day and irregular cycles.