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Health calculators

BMI, daily calories, pregnancy due date, ovulation days and fever temperature.

These are estimates and screening numbers, not a diagnosis. Each page names its medical source (WHO, NHS, ACOG or the published formula), and the pregnancy and ovulation calculators keep no history on your device.

Health
BMI Calculator
Find your body mass index from your height and weight, and the healthy weight range for your height.
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Health
Pregnancy Due Date Calculator
Find your due date from the first day of your last period, or how many weeks pregnant you are from your doctor’s due date, with trimester and term dates.
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Health
Fever Temperature Converter: °F to °C
Convert a thermometer reading between °F and °C and see whether it counts as a fever by the NHS 38 °C (100.4 °F) rule.
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Health
Calorie Calculator: BMR and Daily Calories
Estimate your resting energy (BMR) with the Mifflin–St Jeor equation and the calories a day that keep your weight steady at your activity level.
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Health
Ovulation Calculator: Fertile Days and Next Period
From the first day of your last period and your cycle length, see the days you are likely to ovulate and your next three period dates.
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