BMI Calculator - Free Online | ToolXHub
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For entertainment only, not medical advice
About this tool
BMI Calculator is a free online math tool. Calculate Body Mass Index and assess healthy weight range. Solve calculations and learn with ease. It runs entirely in your browser — no download or sign-up needed.
Enter height and weight, and the tool calculates the BMI value (Body Mass Index). The formula is BMI = weight (kilograms) height (m) ². For example, if you weigh 70 kilograms, have a height of 1.75 m, and have a BMI = 70 1.75² = 22.86.
According to World Health Organization standards: BMI < 18.5 is thin, 18.5-24.9 is normal, 25-29.9 is overweight, and greater than 30 is obese. The tool will display your BMI value and corresponding categories, and use color bars to visually display the location.
BMI is a crude health indicator that does not consider factors such as muscle mass and bone density. Athletes may have a high BMI but normal body fat. A more accurate health assessment needs to combine indicators such as body fat percentage and waist circumference.
The BMI calculator inputs height and weight to calculate BMI values, determines whether the weight is healthy based on World Health Organization standards, and supports metric and imperial systems.