How BMI is calculated: the metric and imperial formulas explained
Learn how BMI is calculated using both imperial and metric formulas. See why height is squared, where 703 comes from, and how to find your weight range.
Nov 13, 2026 · 6 min read
BMI Calculator: articles & guides
Everything we've written about the bmi calculator — how people use it, what they get wrong, and what the math assumes.
