Body Mass Index (BMI) is a simple measure of body weight relative to height, used worldwide as a screening indicator for healthy weight ranges. While it doesn't measure body composition directly, BMI is a quick, no-equipment way to check if you fall in the healthy range. The InstantTool BMI calculator uses the standard WHO classification — underweight (<18.5), normal (18.5–24.9), overweight (25–29.9) and obese (≥30).
Body Mass Index (BMI) is a simple measure of body weight relative to height, used worldwide as a screening indicator for healthy weight ranges. While it doesn't measure body composition directly, BMI is a quick, no-equipment way to check if you fall in the healthy range. The InstantTool BMI calculator uses the standard WHO classification — underweight (<18.5), normal (18.5–24.9), overweight (25–29.9) and obese (≥30).
Where
| Symbol | Meaning |
|---|---|
| weight | Body weight in kilograms |
| height | Height in metres |
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Browse all toolsBMI Calculator calculations are a part of daily life for Indian households. A reliable calculator helps avoid errors, supports accurate financial decisions and ensures compliance with the latest Indian standards and tax rules.