BMI Calculator

Free online BMI calculator. Get your standard Body Mass Index plus a smart reading that factors in age and sex, with an estimated body-fat percentage. 100% client-side.

How to use the BMI Calculator

  1. Open the BMI Calculator — it loads instantly in your browser, with no sign-up or install.
  2. Pick Standard or Smart BMI, choose metric or imperial units, and enter your weight, height, age and sex.
  3. Read your BMI, category and body-fat estimate. Nothing you enter leaves your device.

Frequently asked questions

Is the BMI Calculator free?

Yes. The BMI Calculator on UtilitySuite is completely free, with no account, sign-up or payment required.

Do I need to create an account?

No. Every UtilitySuite tool and game works instantly with no login or registration.

What is a smart BMI?

The Smart BMI mode adds your age and sex to estimate body-fat percentage (Deurenberg formula) and adjusts the healthy-weight interpretation, since the same BMI means different things at different ages and for different sexes.

Is this medical advice?

No. BMI and body-fat estimates are screening indicators only and do not diagnose health. Consult a healthcare professional for personal advice.

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BMI Calculator
Standard BMI
Smart BMI (age & sex)
Units
Weight (kg)
Height (cm)
24.2
Normal weight
Under
Normal
Over
Obese
—
Healthy weight range
—
To reach a normal BMI
BMI, body-fat and adjusted figures are general screening estimates only and are not a medical diagnosis. The body-fat estimate uses the Deurenberg equation and is less accurate for athletes, children, pregnant people and the very elderly. Consult a healthcare professional for personal advice.
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