MyMonthlyCycles Cycle Calculators

We have dozens of monthly cycle, period, fertility, and pregnancy calculators.

• Menstrual Calculator - Forecasts your future periods, including when your next period will start, and up 18 months in advance! Also shows if your period is late; and, if late, how late.
• Menstrual Period Planner - Will I get my period on {you fill in}? Calculate, check, plan!
• Ovulation Calculator - Creates a complete ovulation calendar, forecasting when you'll ovulate and your fertile days over the next several (you select how many) cycles. You can fine-tune the ovulation calculation using your luteal phase.
• Menstrual Period & PMS Calculator - Advanced period calculator uses varying cycle lengths and start dates, with option to include PMS days on the forecasted period calendar.
• Daily Fertility & Symptom Forecast - Shows your cycle forecast for today and tomorrow, including if it's a fertile day. The symptom calculator forecasts what symptoms might occur today based on your symptoms on this cycle day in the past.
• Next Period Calculator Based On Ovulation - Use your ovulation date to get a more precise forecast of when your next period will start, and, optionally, when to use home pregnancy tests.
• Pregnancy Due Date Calculator (LMP) - Estimates your baby's due date based on your last menstrual period.
• Pregnancy Due Date Calculator (Conception) - This calculator estimates your baby's due date based on your approximate date of conception. Your conception date will be calculated based on your last menstrual period, your average cycle length, and luteal phase.
• Due Date Avoider Calculator - If you're trying to avoid certain due dates (like Christmas), calculate your conception cycle avoidance timetable.
• Pregnancy Planning Calculator - Use this what-if planning calculator to find out approximately when your baby would be due if you conceived on {you fill in the date}.
• Reverse Pregnancy Calculator - Trying to plan ahead for your next baby? Just tell this calculator the due date you're considering, and find out approximately when you'd need to conceive.
• Zodiac Baby Planner - Want to plan your baby by zodiac sign? Select zodiac, and calculator shows corresponding conception dates.
• Retro Conception Calculator - This calculator tells you approximately when anyone was conceived!

• Pregnancy Length Calculator - Calculate actual pregnancy length, compares to estimated due date.
• Premature Baby Corrected Age Calculator - Calculates chronological age and adjusted age for babies born preterm.
• Chinese Gender Calculator - According to legend, this gender calendar was used in olden times to predict a boy or girl.
• Modern Gender Predictor - A newer way to predict boy or girl!
• Height Calculator (Mid-Parental Method) - Predicts how tall a child will be as an adult using mid-parental method.
• Height Calculator (Age Two Method) - Estimates duslt height using age two doubling calculation.
• Luteal Phase Calculator - Calculate your luteal phase length for any menstrual cycle.
• Luteal Phase Constancy Calculator - Calculates if your luteal phase is constant, or how much it varies.
• Age Clock / Life Expectancy Calculator - Check out your time clock...
• Zodiac Calculator - Calculate baby's zodiac sign (or yours!)
• Birthstone Calculator - Calculates, shows birthday gem.
• Birth Flower Calculator - Calculates, shows birthday flower.
• Generation Calculator - What's yours? - Calculate anyone's generation based on birth year or current age!
• BMI Calculator - BMI (Body Mass Index) is a measure of body fat based on height and weight, and provides a general indicator of whether or not your weight is within a healthy range.
• Lunar & Space Weight, Moon Periods
• Waist to Hip Ratio Calculator - What's your body type? Apple? Pear? And what it means...
• Frequency Period Calculator - Get a handle on how you're spending your time.
• Countdown Calculator - How Long Until My Date? - Easily calculate how long from now until {you fill in}...
• How Long Since Calculator - Calculate how long it's been since {you fill in}...
• Birth Control Calculator - Compare contraceptives option, from effective rate for perfect and typical use to hormonal content.
• Rhythm Method Calculator (Knaus-Ogino Calendar Method) - Calculate your cycle's fertility phases with the Rhythm Calendar.
• Menstrual Period Time Span - Calculates approximately how many menstrual periods you've had, and how many more periods you may have in the future.
• Trying to Conceive Calculator - Calculates your time to conceive.
• Leap Year Calculator - Calculate leap years, leap birthdays, leap day babies, traditions, FYIs,
• Period Date Calculator - Calculate if there's periodicity to your periods!
• Periods Per Month Calculator - Calculate if your cycle's actually monthly!
• Egg Cell Creation Calculator - Calculate when your egg cell (or anyone's) was created.
• Early Pregnancy Test Calculator - Calculate your cycle's early pregnancy test dates.
• Late Period Calculator - Quickly check if your period is late.
• Missed Period Calculator - Advanced late period calculator.
• Menopause Calculator - Calculate how long until menopause may start; Or, if in menopause, find out exactly how long.
• Shopping Sale Discount Calculator - Smartphone calculator does the shopping discount math! Calculates final price, total savings, sales tax.