Health & Fitness
BMI Calculator
Estimate body mass index from height and weight.
Preparing your result…
What this calculator does
Calculates BMI Calculator using the formula verified against the cited source.
What your result means
An estimate from the inputs you enter, within the scope stated below — not advice.
Formula
BMI = weight ÷ height²
The step-by-step working for your own numbers appears with the result above and in the PDF report.
Frequently asked questions
Symbols and assumptions
- Inputs
- The values entered in the fields above
- • Supported with stated scope. BMI=weight in kg/[height in metres]^2; with cm, BMI=10000×kg/cm². US units: BMI=703×lb/in².
Sources and review
Reviewed 2026-10-18 · Next review 2027-04-18
- • Require positive height and weight and explicit unit conversion. Adult interpretation is for age≥20 in CDC tools; children require age/sex percentiles. BMI is a screening ratio, not measured body-fat percentage or a diagnosis.
Important limitation
This is an educational estimate based only on the values and formula shown. Verify current rates, rules, units, and professional standards before relying on the result. It is not personalized financial or investment advice.
Quick reference
| Scenario | Weight (kg) | Height (cm) | Body mass index |
|---|---|---|---|
| Worked example | 70 | 175 | 22.8571 BMI |
| Half the amounts | 35 | 100 | 35 BMI |
| Double the amounts | 140 | 230 | 26.465 BMI |
Need the full picture? Get the detailed PDF report with charts, tables, formulas and working steps.
Reviewed 2026-10-18 · Next review 2027-04-18
Report a mistake or request an improvement
Tell us if a formula, unit, explanation, or result needs attention. Your message will include this calculator’s name and page.
Related calculators
Relative Fat Mass (RFM) Body Fat Estimate
Estimate body fat percentage using the relative fat mass method.
A Body Shape Index (ABSI) Calculator
Calculate ABSI, which isolates abdominal adiposity from overall body size.
Body Fat 3-Site Skinfold Calculator
Estimate body fat from three Jackson-Pollock caliper sites and age.
Body Fat 7-Site Skinfold Calculator
Estimate body fat from the full seven-site Jackson-Pollock caliper protocol.
Body Fat US Navy Method Calculator
Estimate body fat percentage from neck, waist and hip girths using the US Navy tape method.
Body Surface Area Calculator
Estimate body surface area using the Mosteller formula, used for drug dosing and clinical assessment.
Namaste! Did this BMI Calculator help you?
Aapka ek click humein behtar banata hai. Just tap a star, no sign-in, no typing.