BMI & calorie calculator

Your body metrics at a glance: Body Mass Index with the healthy weight range, basal metabolic rate (Mifflin-St Jeor), and daily calorie targets for maintenance or weight loss.

How to BMI & calorie calculator

1. Step 1. Enter your height, weight, age, and sex.
2. Step 2. Choose your activity level for calorie targets.
3. Step 3. Review your BMI gauge, healthy weight range, BMR, and daily maintenance/loss calories.

Frequently asked questions

How is BMI calculated?

BMI = weight (kg) ÷ height (m)². The healthy range is 18.5–24.9; the gauge shows exactly where you fall.

What is BMR?

Basal metabolic rate — the calories your body burns at complete rest, estimated here with the Mifflin-St Jeor equation.

Is the BMI calculator free?

Yes, completely free and private — all inputs stay in your browser.