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Health
Health
BMI, calories, pregnancy, dosage, sleep.
16 calculators
·
6 sub-fields
BMI
2
calculators
BMI calculator
Body mass index from height and weight.
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Ideal weight calculator
Devine, Robinson, Miller and Hamwi formulas plus the healthy BMI range.
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Calorie
6
calculators
Blood alcohol (BAC) calculator
Estimate blood alcohol concentration using the Widmark formula.
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Calorie needs (BMR & TDEE)
Mifflin-St Jeor BMR + activity multiplier. Metric or imperial.
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Daily protein intake calculator
Recommended grams of protein per day by goal, body weight, and age.
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Daily water intake
Daily fluid target adjusted for body weight, activity, and climate.
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Macro split (protein / fat / carbs)
Daily protein, fat and carb grams from TDEE and goal.
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Weight loss timeline
Project the date you reach a target weight at a given daily deficit.
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Pregnancy
3
calculators
Menstrual cycle calculator
Predict next periods, ovulation dates and fertile windows for the upcoming cycles.
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Ovulation calculator
Estimate ovulation date and fertile window from your cycle length.
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Pregnancy due date
Estimate the due date and current pregnancy week from LMP, conception, or ultrasound.
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Sleep
1
calculator
Sleep cycle calculator
Bedtimes (or wake times) aligned to 90-minute cycles.
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Body composition
3
calculators
Body fat percentage (US Navy)
Estimate body fat from circumferences. Metric or imperial.
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Lean body mass calculator
Lean body mass via three independent formulas (Boer, James, Hume).
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Waist-to-hip ratio (WHR)
Body-shape risk indicator with sex-specific WHO bands and gauge.
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Heart rate
1
calculator
Target heart rate zones
5-zone training plan from age and resting heart rate.
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