Health Calculators

Free, private calculators for BMI, calorie needs, body fat, and heart rate zones. Everything runs in your browser — nothing is uploaded or stored.

✓ 100% Free✓ No Sign-Up✓ Works on Any Device

Weight & Body

Enter your height and weight to estimate your body mass index (BMI) and see which general category it falls in.

Estimate how many calories your body uses each day, plus gentle targets for losing or gaining weight.

Estimate your body fat percentage from simple tape measurements using the US Navy method.

Find your estimated maximum heart rate and the heart rate zones for moderate and vigorous exercise.