informational guide · Updated 2026-08-12
How to calculate BMI
Learn the BMI formula, unit pitfalls, and limitations. Free informational BMI calculator on Utila.
Formula
Adult BMI is weight in kilograms divided by height in meters squared. Mixing centimeters and meters is the most common mistake.
Units
BMI does not measure body fat directly and can misclassify muscular athletes. It is a screening ratio, not a diagnosis.
Limitations
Children require age- and sex-specific percentiles—do not apply adult cutoffs.
Next tools
After BMI, Utila’s BMR and TDEE tools help with educational planning estimates. Speak with a clinician for personal advice.
Primary tool: BMI Calculator
