Fitness calculators
Check your BMI, estimate how many calories you need each day, and split them into protein, carbs and fat.
BMI CalculatorCheck your body mass index from your height and weight.Open calculatorCalorie CalculatorEstimate how many calories you need per day to maintain, lose or gain weight.Open calculatorMacro CalculatorSplit your daily calories into protein, carbs and fat.Open calculator
About these calculators
Height, weight, age and activity go a long way in estimating your energy needs, but they are only estimates. These calculators use published equations and ranges, and each one explains its limits.
Start with the BMI Calculator for a quick screening measure. The Calorie Calculator then estimates what you burn in a day, and the Macro Calculator turns that number into daily grams of protein, carbohydrates and fat.
These tools are for general information and for adults. They don’t replace advice from a doctor or dietitian, especially if you are pregnant, breastfeeding or managing a health condition.