BMI & Fitness Level Calculator

Weight

Height

Result

Calculated result 0.2222222222 Based on the values entered.

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BMI & Fitness Level Calculator Calculate your BMI and estimate your fitness level from body fat. Enter your weight, height, age, and sex, and this calculator returns your BMI, an estimated body-fat percentage using the Deurenberg formula, and a fitness ca — free online calculator.

Formula

BMI = Weight / Height²; Body Fat% = 1.20×BMI + 0.23×Age − 16.2 (male) / −5.4 (female) [Deurenberg]

BMI & Fitness Level Calculator calculates its result from Weight, Height. It uses the formula BMI = Weight / Height²; Body Fat% = 1.20×BMI + 0.23×Age − 16.2 (male) / −5.4 (female) [Deurenberg]. Change any input to recalculate the result instantly. This is an informational calculation and is not medical advice.
The main inputs are Weight, Height. Enter them in the units and format shown in the calculator.
Use the measurement units shown beside each field. The result is an estimate and should be interpreted in context.
Changing any input above recalculates the result with the same calculation engine used by this page.

Example: BMI & Fitness Level

Inputs

Weight: 2
Height: 3

Using Weight = 2, Height = 3, the calculated result is 0.2222222222.

Sample result: Calculating…

Frequently asked questions

What does the BMI & Fitness Level calculate?

Which values should I enter?

Enter Weight, Height using the units and format shown beside each field.

What formula does this calculator use?

The calculator uses the following relationship: BMI = Weight / Height²; Body Fat% = 1.20×BMI + 0.23×Age − 16.2 (male) / −5.4 (female) [Deurenberg].

Why might my result differ from another source?

Results can differ because measurement methods, rounding and assumptions vary. This calculator is an estimate and is not a medical diagnosis.

Does the result update automatically?

Yes. Changing an input updates the result using the same calculation engine shown on this page.

Page information

Updated: October 7, 2026