Does it work in both metric and imperial units?

Yes, you can enter height and weight in either system and it converts internally.

What's the difference between BMR and TDEE here?

BMR is the calories your body burns at complete rest; TDEE multiplies that by an activity-level factor to estimate your actual daily calorie burn — both are shown.

BMI Calculator

BMI, BMR, and healthy ranges.

Runs in your browser

Height

Weight

Age

yrs

Sex

22.9Normal weight

Underweight <18.5Normal 18.5–24.9Overweight 25–29.9Obese ≥30

Healthy weight range for your height: 56.7–76.3 kg

Activity level

BMR (base calories)

1,649

kcal/day

TDEE (daily calories)

1,979

kcal/day

Unit Converter

About

BMI Calculator computes Body Mass Index and Basal Metabolic Rate, using the Mifflin-St Jeor formula, from your height, weight, age, and activity level, then shows a healthy-range gauge and your estimated daily energy expenditure across five activity levels. It supports both metric and imperial units. Nothing you enter is stored or transmitted — it's a client-side calculation only.

Frequently asked

Does it work in both metric and imperial units?: Yes, you can enter height and weight in either system and it converts internally.
What's the difference between BMR and TDEE here?: BMR is the calories your body burns at complete rest; TDEE multiplies that by an activity-level factor to estimate your actual daily calorie burn — both are shown.