Peak Fertility Day Calculator Pinpoint your single best day to try, by combining your cycle average with any ovulation test, temperature, or cervical mucus signs you’ve tracked. Cycle basics First day of last period Average cycle length Add any signs you’ve tracked Optional — but each one you add sharpens the estimate beyond a plain…
Pregnancy Chance Calculator Estimate the likelihood of conception from a specific instance of unprotected sex, based on how close it was to ovulation. I know my ovulation date Estimate from last period Date of intercourse / ejaculation Estimated or confirmed ovulation date From an ovulation test, tracked basal body temperature, or a provider estimate. First…
OPK to Ovulation Calculator Turn your ovulation predictor kit results into an estimated ovulation window, fertile window, and best days to try — or figure out when to start testing in the first place. This tool estimates timing, it doesn’t confirm ovulation. OPKs detect the LH surge that usually precedes ovulation, but the only ways…
Cycle & fertility overview Menstrual Cycle & Fertility Calculator Enter your last period and average cycle length to see which phase you’re in today, your fertility status, this cycle’s key dates, and a forecast for the next three cycles. First day of last period Average cycle length Day 1 of one period to day 1…
Fertility planning tool Ovulation & Fertile Window Calculator Enter the first day of your last period and your average cycle length to see an estimated fertile window, ovulation day, and next expected period. Nothing you type is saved or sent anywhere. First day of last period Pick a date to calculate. Average cycle length Day…