BMI Calculator
Calculate your Body Mass Index from height and weight, and see which BMI category you fall into. Supports metric and imperial units.
How to use this tool
- 1Paste or type your input above.
- 2The result updates instantly.
- 3Copy the output with one click.
Frequently asked questions
How is BMI calculated?+
BMI = weight (kg) Γ· height (m)Β². A BMI of 18.5β24.9 is considered healthy, 25β29.9 overweight, and 30+ obese. BMI is a screening tool, not a diagnosis.
Is this a substitute for medical advice?+
No. These calculators are for general information and education only. Consult a qualified healthcare professional for personal medical advice.
Is my data private?+
Yes. The tool runs entirely in your browser β nothing you paste or type is uploaded to a server.
Guides & deep dives
BMI Explained: Categories, Limitations and What Yours Means
Understand BMI categories, the formula, why athletes skew results, Asian cutoffs, and what to actually do with your number. Clear, evidence-based guide.
How Many Calories Should You Eat? TDEE Explained
Learn how to calculate your TDEE, set the right calorie deficit or surplus, and adjust when progress stalls. Includes activity multipliers and worked examples.
BMR: What It Is and How to Use It to Set Calorie Targets
Learn what BMR is, how Mifflin-St Jeor and Harris-Benedict differ, what factors raise or lower it, and how to build a real calorie target from your number.
Body Fat Percentage: Healthy Ranges and How to Measure It
Learn healthy body fat ranges by gender and age, compare measurement methods (Navy, calipers, DEXA), and understand what essential fat really means.