Health Tools

Calculate your body mass index (BMI) from weight and height in seconds, see your WHO weight category and the healthy weight range for your height.

Find your basal metabolic rate with the Mifflin-St Jeor equation — the calories your body burns at complete rest — from sex, age, weight and height.

Calculate your total daily energy expenditure (TDEE) from BMR and activity level, and see the calories to lose, maintain or gain weight.

Calculate the calories you need each day for your goal, from weight loss to maintenance to a controlled gain, with protein, fat and carb ranges.

Calculate your daily calories and macronutrient split — protein, fat and carbohydrates — from your body weight, activity level and goal.

Calculate how much water to drink each day based on your body weight and exercise time, shown in liters and 250 ml glasses.

Enter your wake-up time and age group to get suggested bedtimes and 90-minute sleep cycles, so you wake at the end of a cycle instead of mid-sleep.

Calculate your daily protein target in grams from body weight and activity level, with per-meal amounts for three and four meals a day.

Calculate a reference ideal body weight and the healthy BMI weight range for your height, in kilograms, using the Devine formula.