What is a healthy BMI range?

A healthy BMI range is typically 18.5 to 24.9 for adults.

How often should I check my BMI?

For most adults, checking BMI 2-4 times per year is sufficient.

BMI may not be accurate for athletes due to increased muscle mass.

BMI doesn't distinguish between fat and muscle mass or account for body fat distribution.

Calculate your Body Mass Index (BMI) and find out your health category. Supports metric and imperial units.

Last updated: 2025-10-21 — Compiled and reviewed by Calvin (Health Research, FreeCalculators.app)

Height

Weight

Underweight< 18.5

Normal weight18.5 - 24.9

Overweight25 - 29.9

Obese≥ 30

Find answers to common questions about Body Mass Index.