TDEE vs BMI: Which Fitness Calculator Should You Use?
BMI and TDEE calculators answer different fitness questions. Learn when to use each one for weight loss, maintenance and performance goals.
BMI and TDEE are both popular fitness calculations, but they are not interchangeable. BMI estimates body weight category from height and weight. TDEE estimates how many calories you burn per day.
Use BMI for a quick body-weight estimate
BMI can help you understand whether your weight sits in a general range, but it does not measure muscle, body fat or fitness.
Use TDEE for calorie planning
TDEE is more useful for setting calorie targets because it estimates maintenance calories. From there, you can plan fat loss, maintenance or muscle gain.
Best approach
Use BMI as a rough reference, then use TDEE, macros and protein targets to build a more useful plan.