Health & fitness calculators
BMI, calories, body fat and hydration, using published formulas.
BMI CalculatorBody mass index with the WHO category and healthy weight range.
Calorie NeedsBMR and daily calories with an activity multiplier (Mifflin-St Jeor).
Body FatBody fat percentage with the US Navy tape method.
Ideal WeightHealthy weight range and BMI-based targets for your height.
Water IntakeDaily water target from weight and activity.
Heart Rate ZonesTraining zones from age, using the Fox formula.
Pregnancy Due DateEstimated delivery date from the last menstrual period.
Macro SplitProtein, carbs and fat grams for a calorie target.
Protein NeedsDaily protein target by weight and training goal.
Sleep DebtHow many hours you owe from a week of short sleep.
Lean Body MassLean mass from weight and body fat %
Waist-to-Hip RatioCardiometabolic risk screen.
Waist-to-HeightA better screen than BMI for central fat.
Calories BurnedEnergy burned by activity and time (MET).
One Rep MaxEstimated 1RM from a set (Epley).
Pace CalculatorPace and speed from distance and time.
Steps to KMDistance from steps and stride length.
Pregnancy WeekWeeks and trimester from the last period.
Ovulation WindowLikely fertile days from cycle length.
Body Surface AreaBSA by Du Bois (dosing, burns).