---
title: "Body Mass Index (BMI) Calculator Free — Nexvert"
description: "Calculate your BMI and discover healthy weight ranges with metric and imperial units. Free instant results with no sign-up and nothing stored."
url: https://nexvert.online/bmi-calculator/
---

# Body Mass Index (BMI) Calculator Free

Calculate your BMI and discover healthy weight ranges with metric and imperial units. Free instant results with no sign-up and nothing stored.

## What is Body Mass Index (BMI) Calculator?

The BMI Calculator computes Body Mass Index from height and weight — weight in kilograms divided by height in metres squared — in metric or imperial units, and shows the World Health Organization category: underweight (below 18.5), healthy (18.5–24.9), overweight (25–29.9) or obese (30 and above). For example, 70 kg at 175 cm gives a BMI of 22.9. BMI is a quick screening measure, not a diagnosis.

## How to use Body Mass Index (BMI) Calculator

1. **Choose units** — Metric (kg, cm) or imperial (lb, ft/in).
2. **Enter height and weight** — Type your measurements.
3. **See your BMI** — Read the BMI value and its WHO category.

## Frequently asked questions

### What is a healthy BMI?

18.5 to 24.9 for adults, according to the WHO.

### Is BMI accurate for athletes?

Not always. BMI does not distinguish muscle from fat, so muscular people may be classed as overweight.

### Does BMI apply to children?

Children and teens use age- and sex-specific BMI percentiles, so adult categories do not apply.

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Source: https://nexvert.online/bmi-calculator/
HTML version: https://nexvert.online/bmi-calculator/