Health & Fitness Calculators
Standard, well-documented formulas with clear explanations of what each number means — and what it doesn't.
These tools are for general information only. For medical decisions, talk to a doctor or registered dietitian.
14 health & fitness calculators
BMI Calculator
BMI with WHO and South Asian categories.
Open calculatorBMR Calculator
Calories your body burns at rest.
Open calculatorTDEE Calculator
Daily calories burned with activity.
Open calculatorCalorie Calculator
Daily calories to maintain, lose or gain weight.
Open calculatorProtein Calculator
Grams of protein per day for your goal.
Open calculatorIdeal Weight Calculator
Healthy weight range for your height.
Open calculatorWater Intake Calculator
Daily water in litres and glasses.
Open calculatorMacro Calculator
Split calories into protein, carbs and fat.
Open calculatorBody Fat Calculator
Body fat % from a few tape measurements.
Open calculatorPregnancy Due Date Calculator
Due date, weeks pregnant and trimesters.
Open calculatorOvulation Calculator
Ovulation day and fertile window.
Open calculatorHeart Rate Zone Calculator
Max heart rate and training zones.
Open calculatorRunning Pace Calculator
Pace per km, speed and finish times.
Open calculatorSleep Calculator
Bedtimes and wake times by sleep cycles.
Open calculator