BMI guides
Short, careful explanations that match what the calculator does.
Tools
Guides
- What is BMIThe formula, its history and what it is for.
- BMI categories chartUnderweight to obesity class 3, in one table.
- Is BMI accurateWhere BMI works and where it misleads.
- BMI for children and teensWhy a different method is used, and why this tool is adult only.
- How our BMI calculator worksThe formula, rounding and privacy, step by step.