# BMI Calculator > Calculate your Body Mass Index and see where you fall on the healthy range. URL: https://uttir.com/bmi-calculator Categories: calculators Privacy: Your measurements are processed in your browser and never leave your device. ## About Body Mass Index (BMI) is a quick screening number that relates your weight to your height. It is one of the most common starting points for understanding where you stand on the weight spectrum. Enter your height and weight — in metric or imperial units — and this calculator returns your BMI, the category you fall into, and the healthy weight range for your height. ## How to use 1. **Choose your units** — Switch between metric (kg, cm) and imperial (lb, ft + in). 2. **Enter height and weight** — The BMI updates as soon as both fields are valid. 3. **Read the result** — See your BMI, category, and the healthy weight range for your height. ## Examples ### A 70 kg adult at 175 cm A classic healthy-range example. Input: ``` 70 kg · 175 cm ``` Output: ``` BMI ≈ 22.9 — "Healthy weight", healthy range 56.7–76.3 kg. ``` ## FAQ ### What do the BMI categories mean? Under 18.5 is underweight, 18.5–24.9 is a healthy weight, 25–29.9 is overweight, and 30+ is obese. BMI is a screening tool, not a diagnosis. ### Is BMI accurate for athletes? BMI does not distinguish muscle from fat, so muscular people may read as overweight. For most people it is a useful guide, but it is not a complete health picture. ### What is a healthy weight for my height? The healthy range corresponds to a BMI between 18.5 and 24.9. The calculator shows the exact weight range for your height in both metric and imperial. ## Related tools - [Percentage Calculator](https://uttir.com/percentage-calculator) — Three percentage tools in one: percent of a value, ratio as a percent, and percent change. - [Age Calculator](https://uttir.com/age-calculator) — Find the exact age in years, months, and days — plus totals and the countdown to the next birthday. - [Date Calculator](https://uttir.com/date-calculator) — Count the days between two dates, or add and subtract days from any date. --- For the full HTML page with the live tool, visit https://uttir.com/bmi-calculator. This file is the markdown rendering at https://uttir.com/bmi-calculator.md. See https://uttir.com/llms.txt for a site-wide summary.