70 kg at 175 cm
Input Weight 70 kg, height 175 cm.
Result BMI 22.9, inside the healthy range of 56.7–76.3 kg.
BMI Calculator
Everyday LifeCheck your body mass index and the healthy weight range for your height, in metric or imperial units.
Your inputs
Result
Body mass index
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- Healthy weight from — kg
- Healthy weight up to — kg
- Outside the range by — kg
Change any input and the result updates instantly.
Formula and rules
- BMI = weight in kilograms ÷ (height in metres)²
- Healthy BMI range for adults: 18.5 to 24.9
- Healthy weight = BMI limit × height in metres squared
- Difference = how far your weight sits outside the nearest end of the range, or 0 if you are inside it
Worked examples
154 lb at 69 in
Input Weight 154 lb, height 69 in.
Result BMI 22.7, inside the healthy range of 125.3–168.6 lb.
95 kg at 170 cm
Input Weight 95 kg, height 170 cm.
Result BMI 32.9, which is 23.0 kg above the 72.0 kg top of the healthy range.
FAQ
Is BMI reliable for athletes or very muscular people?
BMI only compares weight with height, so it cannot tell muscle from fat. A muscular athlete can read as overweight while carrying little body fat. Use waist measurements or body composition alongside BMI.
What is a healthy BMI?
For most adults 18.5 to 24.9 is classed as healthy, 25 to 29.9 as overweight and 30 or above as obese. Some clinical guidelines use lower cut-offs for people of Asian descent, so follow your doctor’s advice.
Can I use this BMI calculator for children?
No. Children and teenagers are assessed with age- and sex-specific BMI percentiles rather than fixed adult cut-offs. Use a paediatric growth chart or ask your doctor.
Disclaimer: BMI is a screening measure for adults only. It does not reflect body fat, muscle mass or overall health, and it is not medical advice. Talk to a doctor or registered dietitian before acting on the result.