BMI and Calorie Calculator
Work out your BMI, healthy weight range and how many calories you need each day to lose, maintain or gain weight. Runs in your browser - nothing is sent to a server.
Enter your age, height and weight to see your results.
Frequently Asked Questions
BMI is your weight in kilograms divided by your height in metres squared. A BMI from 18.5 to 24.9 is classed as a healthy weight, 25 to 29.9 as overweight and 30 or above as obese under the standard WHO scale.
TDEE is your total daily energy expenditure, the calories you burn in a day. It is your basal metabolic rate (calories at rest) multiplied by an activity factor. Eating around your TDEE keeps your weight steady.
The calculator uses the Mifflin-St Jeor equation for basal metabolic rate, which is widely considered one of the more accurate formulas for most adults.
The WHO notes that people of South and East Asian descent can carry higher health risk at a lower BMI. The Asian scale classes overweight from 23 and obese from 27.5.
They are estimates. BMI does not separate muscle from fat, and calorie needs vary between people. Use the numbers as a starting point and adjust based on how your weight changes over a few weeks. This tool is not medical advice.
No. Everything is calculated in your browser and nothing is sent to a server.
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