BMI Calculator

Not always — muscle is dense, so very muscular people can show a high BMI without excess fat.

Calculate Body Mass Index from weight and height.

Weight

Height

BMI (kg/m²) 22.857

Category Normal weight

Formula: BMI = weight (kg) ÷ height (m)²

Step-by-step with your numbers:

1. Values used:

2. Weight = 70

3. Height = 175

5. Height in metres = 175 / 100 = 1.75 m

6. Height squared = 1.75 x 1.75 = 3.063

7. BMI = Weight / Height squared = 70 / 3.063 = 22.857kg/m²

8. Category = Normal weight

Did we solve your problem today?

Body Mass Index is a quick screen for whether your weight is in a healthy range for your height. It's a general guide, not a diagnosis.

The math behind it

BMI = weight in kilograms ÷ (height in meters squared).

Ranges: <18.5 underweight, 18.5–24.9 normal, 25–29.9 overweight, ≥30 obese.

70 kg, 175 cm → 70 ÷ 1.75² = 22.9 (normal weight).

Is BMI accurate for athletes?

Not always — muscle is dense, so very muscular people can show a high BMI without excess fat.