Finance & Business•Free & Browser-Based
BMI Calculator
Calculate Body Mass Index (BMI) using metric (cm/kg) or imperial (ft-in/lbs) units, with WHO weight categories and healthy weight range.
Body Mass Index (BMI)
22.9 (Normal Weight)
Healthy weight BMI span: 18.5 – 24.9
Career PartnerSponsored
Land 3x More Interviews with AutoResume AI
Scan your resume against 50,000+ job descriptions and beat ATS filters automatically.
What is the Free Online BMI Calculator?
Body Mass Index (BMI) is a screening tool used by healthcare organizations worldwide to categorize whether an adult's body weight falls into a healthy range for their height.
100% Client-Side Privacy: Calculations and data processing occur entirely in your local browser memory. Zero files or personal inputs are uploaded to our servers.
How to Use BMI Calculator Online: Step-by-Step Guide
- 1Select unit system (Metric: cm & kg, or Imperial: feet/inches & lbs).
- 2Enter height and weight.
- 3View your BMI score, WHO category (Underweight, Normal, Overweight, Obese), and ideal healthy weight span for your height.
Mathematical Formula & Underlying Logic
\text{BMI} = \frac{\text{Weight (kg)}}{[\text{Height (m)}]^2} \quad \text{or} \quad \text{BMI} = \frac{703 \times \text{Weight (lbs)}}{[\text{Height (inches)}]^2}
Real-World Calculation Example
Height = 175 cm (1.75 m), Weight = 70 kg. $\text{BMI} = 70 / (1.75)^2 = 70 / 3.0625 = 22.86$ (Normal Weight).
Related Search Topics & Keywords
Related Tools to BMI Calculator
Student PartnerSponsored
GitHub Student Developer Pack — $1,000+ in Free Software
Claim free GitHub Copilot, JetBrains IDE licenses, domain names, and cloud credits.