- Body Composition Calculator
- Metabolism Calculator
- Nutrition Calculator
- Heart Health Calculator
- Pregnancy Calculator
- Fitness Calculator
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Crown-Rump Length (CRL) Gestational Age CalculatorEstimate gestational age from crown-rump length (CRL) in mm using the Robinson-Fleming formula. Get age in weeks and days from a first-trimester scan.
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Breastfeeding Calorie CalculatorEstimate how many calories you need per day while breastfeeding. Uses Mifflin-St Jeor BMR, your activity level, and a lactation calorie add.
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Baby Age CalculatorCalculate a baby's exact age in total days, weeks, weeks-plus-days, and calendar months-plus-days from birth date to any as-of date.
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Cost of Having a Baby CalculatorEstimate the total cost of having a baby — medical bills, one-time gear, nursery and recurring monthly expenses — with this free first-year baby cost calculator.
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Diaper CalculatorFree diaper calculator estimates how many diapers your baby needs over any period and the total cost based on diapers per day and price per diaper.
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Guinea Pig Pregnancy CalculatorEstimate your guinea pig's due date from the mating date. Uses the average 68-day gestation period plus a likely birth window for sows.
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Goat Gestation CalculatorCalculate your goat's due (kidding) date from the breeding date. Adds a 150-day average gestation and shows days pregnant and days remaining.
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Cat Pregnancy CalculatorEstimate your cat's kitten due date from the mating date. Feline gestation averages 65 days — get the expected delivery date and birthing window.
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Cow Gestation CalculatorCalculate a cow's calving due date from the breeding date. Uses the standard 283-day bovine gestation period (adjustable for breed differences).
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Llama Gestation CalculatorEstimate a llama's cria due date from the breeding date. Uses an average 350-day gestation with an adjustable length and a likely birth window.
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Swine Gestation CalculatorCalculate a sow's farrowing due date from the breeding date using the standard 114-day swine gestation period (3 months, 3 weeks, 3 days).
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Sheep Gestation CalculatorCalculate a ewe's lambing due date from the breeding date. Uses the average 147-day sheep gestation period plus an expected lambing window.
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Rabbit Gestation CalculatorEstimate your rabbit's kindling (due) date from the breeding date. Rabbit gestation averages 31 days—get a due date and nest box reminder.
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Menstrual Period CalculatorPredict your next period start, ovulation day and fertile window from your last period date and average cycle length. Fast and free.
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Conception Date CalculatorEstimate your conception date from your last menstrual period or due date. Uses the standard LMP + 14 days and 280-day gestation rule.
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Pregnancy Weight Gain CalculatorFind your recommended pregnancy weight gain by week based on pre-pregnancy BMI, using IOM 2009 guidelines. Get total range and weekly target.
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Pregnancy Conception Date CalculatorEstimate your conception date from your last menstrual period (LMP) or your due date. Quick, free conception and due-date estimator.
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Due Date CalculatorCalculate your due date accurately with this due date calculator. Input your last period and cycle length to determine your expected delivery date. Plan for your baby's arrival with precision.
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Ovulation CalculatorCalculate your ovulation date with this Ovulation Calculator. Input your last period start date and average cycle length to determine fertile days and plan for conception or contraception effectively.
