Ideal weight
Devine ideal body weight from sex and height. A reference, not a goal you must hit.
Open a calculatorBMI
BMI is body weight in kilograms divided by height in metres squared. The adult bands follow WHO cut-offs. The index does not distinguish fat from muscle.
Body mass in kilograms — enter your current weight without shoes or heavy clothing.
Body mass in kilograms — enter your current weight without shoes or heavy clothing.kg
Height in centimetres — the calculator converts it to metres for the BMI formula.
Height in centimetres — the calculator converts it to metres for the BMI formula.cm
BMI
24.2Healthy weight
Healthy weight for this height
53.5–72.0 kg
BMI: 24.2. Healthy weight
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Frequently asked questions
How is BMI calculated?
BMI is body mass in kilograms divided by height in metres squared. At 70 kg and 170 cm that is 70 ÷ (1.70 × 1.70) ≈ 24.2. You enter height in centimetres; the calculator converts to metres.
What are the WHO BMI bands for adults?
Below 18.5 is underweight, 18.5–24.9 is the healthy range, 25–29.9 overweight, 30–34.9 class I obesity, 35–39.9 class II, 40 and above class III. The bands are for adults, not children.
Does BMI tell fat apart from muscle?
No. A high BMI in a muscular person is not obesity, and a “normal” BMI can still hide excess visceral fat. For body composition, use the body-fat or waist-to-hip calculators instead.
What healthy weight range matches my height?
The calculator shows the mass range that corresponds to BMI 18.5–24.9 at the height you entered. That is a WHO orientation, not a training target. Athletes and older adults often need a different assessment than the index alone.
Is a BMI result a medical diagnosis?
No. It is an educational screening number. It does not replace an exam, a history or a decision about diet or treatment. If you are ill, pregnant or dealing with an eating disorder, take the figures to a clinician.
An educational estimate. Not medical, tax or credit advice.