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Health & Fitness Tools

BMI, calories, body fat, heart rate zones, running pace and more — estimates for general information, not medical advice.

  • BMI Calculator

    Calculate body mass index from weight and height in metric or imperial units, with the WHO category.

  • Body Fat Calculator

    Estimate body fat percentage from tape measurements with the US Navy method, in metric or US units.

  • Calorie Calculator

    Estimate how many calories you burn a day (TDEE) and your resting metabolic rate (BMR).

  • Heart Rate Zone Calculator

    Find your five training heart rate zones from your age, with the Karvonen method if you know your resting heart rate.

  • Ideal Weight Calculator

    Compare the Devine, Robinson, Miller and Hamwi ideal weight formulas with the healthy BMI range for your height.

  • Macro Calculator

    Split daily calories into grams of protein, carbohydrate and fat for balanced, low-carb, high-protein or endurance diets.

  • One-Rep Max Calculator

    Estimate your one-rep max from a set of reps with the Epley, Brzycki and Lombardi formulas, plus training loads.

  • Running Pace Calculator

    Work out running pace, finish time or distance, per kilometre or per mile, with race presets.