BMI Calculator — Check Your Body Mass Index Free
Check your Body Mass Index in seconds.
How to use the BMI Calculator
- 1
Enter your height and weight.
- 2
Switch between metric and imperial units anytime.
- 3
Read your BMI value and health category.
Privacy: This tool runs 100% in your browser. Your files and text are processed on your own device and never uploaded to any server — you can verify this in your browser's Network tab.
BMI Calculator FAQs
For most adults: under 18.5 is underweight, 18.5–24.9 is healthy, 25–29.9 is overweight, and 30+ is obese (WHO categories).
About this tool
Body Mass Index is the world's most widely used quick screen for weight-related health risk: weight divided by height squared, sorted into four WHO categories. DrokyAi's calculator works in both metric (kg/cm) and imperial (lb/in) units and shows exactly where you land on the scale. Remember its limits — it doesn't account for muscle mass, bone density, age or pregnancy — so use it as a starting point for a conversation with a health professional, not a verdict. This tool is informational only and not medical advice.
Related Tools
Age Calculator
Find your exact age in years, months and days.
CalculatorsPercentage Calculator
Percentages, increases, decreases and discounts — solved.
CalculatorsDate Difference Calculator
Days, months and years between two dates, instantly.
CalculatorsLoan / EMI Calculator
Calculate monthly installments and total interest.
CalculatorsGPA Calculator
Compute your grade point average from courses.
Calculators