BMI Calculator — Free Body Mass Index Calculator | ToolCircuit
Calculate BMI (Body Mass Index) using metric or imperial units. See BMI value, category, and healthy weight range. Free, client-side BMI calculator.
No uploads. Everything runs locally in your browser.
Calculate your Body Mass Index (BMI) in metric or imperial units. Get your BMI value, category, and a healthy weight range estimate. Runs client-side for privacy.
Informational only — not medical advice. Consult a professional for health decisions.
Enter weight and height to calculate BMI.
What is BMI?
BMI (Body Mass Index) estimates body fat using weight and height. It’s a quick screening measure, not a diagnostic tool.
BMI categories
Common ranges: Underweight (<18.5), Normal (18.5–24.9), Overweight (25–29.9), Obese (30+). Interpret with care; muscle mass and other factors matter.
Benefits & use cases
- Quickly check BMI for general awareness.
- Estimate healthy weight range for your height.
- Switch metric/imperial units for convenience.
Note: BMI is a screening metric, not a medical diagnosis.
How to use
- Enter your weight and height (switch metric/imperial as needed).
- Click Calculate to see BMI value and category.
- Copy the result or load a sample; clear to start over.
Features
- BMI calculation with metric and imperial units
- BMI category and healthy weight range estimate
- Sample loader, copy, and clear actions
- Inline validation for missing/invalid inputs
- Runs entirely in your browser
FAQ
Is this free?
Yes. It runs locally in your browser.
Do you store my data?
No. Inputs are processed client-side only.
Which units are supported?
Metric (kg, cm) and Imperial (lb, inches).
What are the BMI categories?
Underweight (<18.5), Normal (18.5–24.9), Overweight (25–29.9), Obese (30+).
Is this medical advice?
No. This is informational only. Consult a professional for medical guidance.