BMI Calculator
Estimate your body mass index from height and weight. An estimate, not a diagnosis.
Inputs
Result
Enter your values to see the result.
How it works
BMI divides your weight by the square of your height. It is a quick screening number for adults and says nothing about muscle, bone or where body fat sits. Use it as a rough guide only.
- BMI = weight (kg) ÷ height (m)²
- < 18.5 · 18.5–24.9 · 25–29.9 · ≥ 30 (WHO adult categories)
Assumptions
- BMI is a general estimate, not a medical diagnosis. It doesn’t account for muscle mass, age or body composition. Talk to a healthcare professional about your health.
- Categories follow the WHO adult ranges and don’t apply to children or teenagers.
Every calculation runs in your browser. Nothing you enter is uploaded.
Related tools
- Fuel Cost CalculatorWhat a trip will cost in fuel, from distance, consumption and fuel price.
- Fuel Consumption CalculatorFind your car’s consumption in L/100 km, km/L and mpg from distance and fuel used.
- Electricity Cost CalculatorWhat an appliance costs to run per day, month and year from its power and your tariff.