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Health & Everyday Life

Health & Everyday Life calculators.

Twelve calculators built on published, named formulas. Each page states which equation it uses and where it came from, because a health figure you cannot trace is a health figure you should not act on.

Body composition 5

BMIBody mass index from height and weight, with the band it falls in and that band's limits. Body Fat PercentageEstimated body fat from circumference measurements, no calipers needed. BMRBasal metabolic rate — the energy your body uses at complete rest. Ideal Body WeightEstimated ideal body weight from height and sex, using the Devine formula. Waist-to-Hip RatioWaist-to-hip ratio from two measurements, with the WHO risk band for your sex.

Energy & nutrition 3

These build on each other — BMR feeds TDEE, and TDEE feeds your macro split. Each page links back to the one before it.

Calorie / TDEETotal daily energy expenditure from your activity level, with targets for loss or gain. MacroProtein, carbohydrate and fat targets in grams from a calorie goal and chosen split. Water IntakeA daily fluid target from body weight, activity and climate.

Training & milestones 4

Target Heart RateTraining zones in beats per minute from your age and resting heart rate. One-Rep MaxEstimated one-rep max from the weight and reps of a recent set, using the Epley formula. Pregnancy Due DateEstimated due date and current stage, counted from your last period. OvulationEstimated ovulation date, fertile window and next period from your last cycle.

Other categories