Health and fitness calculators
Free calculators for health and fitness — BMI, daily calorie needs, steps to miles, and running pace. These are general-guidance estimates only and not medical advice.
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BMI Calculator
Work out your body mass index from height and weight — in metric (cm/kg) or imperial (ft+in/lb), with the WHO category band.
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Calorie Needs Calculator
Work out your BMR and total daily energy needs from age, sex, height, weight, and activity level — using the Mifflin-St Jeor equation.
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Running Pace Calculator
Calculate running pace, time, or distance from any two of the three — with race-time projections for 5K, 10K, half marathon, and marathon.
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Steps to Miles Calculator
Turn step counts into distance — at walking, jogging, or running pace — using a stride estimate from your height.