BMI Calculator
Result
Calculated result
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Change any value to calculate instantly.
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BMI Calculator — free online calculator.
Formula
BMI = weight (kg) ÷ [height (m)]²
- BMI Calculator divides body weight in kilograms by height in meters squared. BMI is a screening measure and is not a diagnosis.
- 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
Inputs
- Weight: 70 kg
- Height: 175 cm
For 70 kg and 175 cm: BMI = 70 ÷ 1.75² ≈ 22.86.
Sample result: Calculating…
Frequently asked questions
What does the BMI calculate?
BMI Calculator — free online calculator.
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 (kg) ÷ [height (m)]².
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.