BMI Calculator
Estimate your Body Mass Index from height and weight, see which category it falls into, and check your healthy weight range for your height. Choose WHO global cutoffs or the lower Asian (WHO Asia-Pacific) cutoffs, more relevant for South Asian bodies. Works in metric or imperial units.
How to use bmi calculator
- Choose units and standard
Switch between metric and imperial, and pick WHO global or Asian cutoffs.
- Enter height and weight
Type your measurements into the two fields.
- Calculate
Click Calculate to see your BMI value, category and healthy weight range.
Features
Enter centimetres and kilograms, or inches and pounds.
Switch to the lower Asian (WHO Asia-Pacific) thresholds used across much of South and East Asia.
See the weight range that keeps you in the normal category at your height, not just a single number.
Your health numbers are never uploaded.
Supported formats and limitations
Text and structured input supported by this tool.
Use cases include personal workflows, content preparation, and quick checks. Review output before relying on it for legal, financial, accessibility, or production decisions.
Frequently asked questions
How is BMI calculated?
BMI is weight in kilograms divided by height in metres squared. Imperial inputs are converted before the same formula is applied.
Is BMI a complete health measure?
No. BMI is a rough screening tool. It ignores muscle mass, body composition and other factors, so treat it as one signal, not a diagnosis.
What are the standard (WHO global) categories?
Under 18.5 is underweight, 18.5–24.9 normal, 25–29.9 overweight, and 30 or above is in the obese range.
Why does this tool offer an Asian BMI standard, and how is it different?
At the same BMI, people of South and East Asian descent tend to carry more body fat and face higher diabetes/heart-disease risk than the WHO global cutoffs assume. The WHO Asia-Pacific standard lowers the thresholds: under 18.5 underweight, 18.5–22.9 normal, 23–27.4 overweight, 27.5 or above obese. It's widely used in India and across Asia for a more accurate risk read.
How is the healthy weight range worked out?
It's the weight span that keeps your BMI within the normal-category bounds for the standard you selected, at your entered height — for example, 18.5–24.9 × height² in metric.