What your result means (before you calculate)
BMI is weight ÷ height² (kg/m² or the US 703×lb/in² form). It screens weight categories—it does not measure body fat. Pair it with waist or body-fat tools if you train hard or carry extra muscle.
Worked example (metric)
70 kg at 1.75 m → BMI = 70 ÷ 1.75² ≈ 22.9 (often labeled “normal” on standard charts). At 80 kg with the same height, BMI ≈ 26.1 (“overweight” on the same chart).
BMI Calculator: Body Mass Index Guide
By Ahmet C. Toplutaş·Site Owner & Editor
Last updated: May 21, 2026Last reviewed: May 21, 2026Planning estimates only — not tax, medical, or investment advice.
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