Period, ovulation and fertility calculators

Predict your next period, ovulation and fertile days from your cycle, work out when to take a pregnancy test, and track cycle length and symptoms.

14 free calculators

Period Tracker and Next Period Calculator - Predict your next 3 periods and see your cycle phase. Also called: period calculator, next period date, period predictor.
Ovulation Calculator - Find your ovulation day, fertile days and peak fertility. Also called: ovulation date calculator, when do I ovulate, ovulation tracker.
Fertile Window Calculator - Your fertile days and chance of pregnancy today. Also called: fertile days calculator, fertility window, when am I most fertile.
Pregnancy Test Date Calculator - The best day to take a pregnancy test. Also called: when to take a pregnancy test, pregnancy test calculator, earliest pregnancy test date.
Next Ovulation Date Estimator - Predict your next 3 ovulation dates with a margin. Also called: next ovulation calculator, future ovulation dates, ovulation predictor.
Conception Date Estimator - Estimate when you conceived and your due date. Also called: conception calculator, when did I conceive, date of conception calculator.
Implantation Window Estimator - When implantation happens and when spotting may occur. Also called: implantation calculator, implantation date calculator, when does implantation happen.
Missed Period Calculator - How late is your period and what to do next. Also called: late period calculator, how late is my period, days late calculator.
Menstrual Calendar - A calendar of your periods, fertile days and PMS days. Also called: period calendar, menstrual cycle calendar, cycle calendar.
Menstrual Cycle Length Calculator - Your average, shortest and longest cycle from past periods. Also called: cycle length calculator, average cycle length, how long is my cycle.
Period Duration Calculator - How many days your periods last, with a trend chart. Also called: period length calculator, how many days is my period, period duration.
Irregular Period Tracker - Predict a window for your next period when cycles vary. Also called: irregular period calculator, irregular cycle predictor, irregular period due date.
PMS Symptom Tracker - Score your PMS symptoms and see which are strongest. Also called: PMS tracker, PMS score, premenstrual symptom checker.
Pregnancy Planning Age Calculator - How age affects your chance of conceiving. Also called: fertility by age calculator, chance of pregnancy by age, when to start trying for a baby.

More health calculators

These calculators are for education only and are not medical advice. See the medical disclaimer and how we build and review our tools. Looking for medicine prices? Compare medicine prices in 32 countries on MediHub.