Computes Body Mass Index from metric or imperial height and weight inputs, categorizing the result into underweight, normal, overweight, and obese, with a healthy weight range for your height. Health data never leaves your device — every calculation runs locally in your browser.
Content reviewed October 2026 · About Toolzum
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Both metric (kg/cm) and imperial (lbs/ft-in) inputs are supported. Toggle between units and the calculator converts and computes your BMI instantly.
The result is categorized into underweight (below 18.5), normal weight (18.5–24.9), overweight (25–29.9), and obese (30+). These are the standard WHO classifications.
BMI does not distinguish between muscle and fat. Athletes with high muscle mass may have an elevated BMI despite low body fat. Use it as a general indicator, not a diagnostic tool.
The calculator shows your current result plus the healthy range for your height (18.5–24.9 × height²): at 170 cm that is 53.5–72.0 kg, downloadable as CSV. For tracking over time, note your BMI values manually or use the companion health calculators on the site.
No. All calculations run locally in your browser. No height, weight, or BMI data is transmitted or stored on any server.
Ideal Body Weight
Compute healthy weight range with Devine and Robinson formulas from height. See a 170 cm target band instantly — free, local, informational only.
Body Fat Percentage Calculator
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Calculate your Total Daily Energy Expenditure (TDEE) from BMR and activity level. Find how many calories you burn per day.