How to Calculate BMI
Calculate BMI from weight and height.
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Quick answer
BMI is weight in kilograms divided by height in meters squared. It is a general screening measure, not a medical diagnosis.
Step-by-step
- Write down the values you already know.
- Use the correct formula and keep the units consistent.
- Calculate the result and check whether it makes practical sense.
Use the calculator
The easiest way to avoid mistakes is to use the related calculator and then review the formula shown on the page.
Common mistakes
- Using the wrong unit or percentage format.
- Rounding too early.
- Forgetting extra costs, waste, taxes, or allowances where they apply.
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