Health Calculators

Free BMI, calorie, ideal weight and water intake calculators with the formulas and sources explained.

Tools in this category

• BMI CalculatorFree BMI calculator for adults in metric or imperial units. See your BMI, WHO category and healthy weight range for your height.
• Calorie Calculator (BMR & TDEE)Estimate your daily calorie needs with the Mifflin–St Jeor formula. See your BMR, maintenance calories and activity level adjustment.
• Ideal Weight CalculatorFind your ideal body weight with the Devine, Robinson, Miller and Hamwi formulas, plus the healthy BMI weight range for your height.
• Water Intake CalculatorEstimate how much water to drink each day from your weight, exercise and climate. Results in litres, glasses and fluid ounces.