BAI Calculator - Body Adiposity Index

This free comparison calculator includes a full BAI computation component alongside BMI, using hip circumference and height inputs for BAI. It provides the BAI formula, output ranges, and context notes to help users understand the estimate. The tool is publicly accessible and usable without a required paid plan.

6 options💪 Body Metrics & Fitness

BMI Calculator – Body Mass Index

CDC provides a free adult BMI calculator using either U.S. customary or metric units. It returns your BMI value and corresponding category, and includes context on interpretation and limitations. The tool is publicly accessible with no account or payment required.

6 options💪 Body Metrics & Fitness

BMI Calculator for Kids

This free NHS calculator checks BMI for children and teenagers aged 2 to 17, covering both girls and boys including age 9. It uses child-specific inputs such as date of birth, sex at birth, height, and weight to provide guidance. The page also explains who should use the tool and limitations of BMI interpretation.

BMR Calculator (Basal Metabolic Rate, Mifflin St Jeor Equation)

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