BMI Calculator
Calculate body mass index and a normal-weight range from height and weight.
Note: BMI is a reference indicator only. It cannot diagnose health status by itself; consult a medical professional for personal advice.
Category: Life Tools
When to use?
Use it before a health checkup or when setting a weight-management goal based on your current height and weight.
How to use
- Enter height in cm.
- Enter weight in kg.
- Check BMI category and the normal-weight range.
Input Explanation
Enter adult height and weight; decimals are supported.
Calculation Basis
BMI = weight(kg) ÷ height(m)^2. WHO categories: under 18.5 underweight, 18.5–24.9 normal, 25–29.9 overweight, 30+ obese.
Usage Examples
- Weight-status check - See a rough BMI category from height and weight.
- Goal setting - Use the normal-weight range as a planning reference.
- Health-check prep - Bring a quick reference value to a consultation.
Examples
- 170 cm, 65 kg → BMI 22.5, normal
- 160 cm, 70 kg → BMI 27.3, overweight
Cautions
- This is an estimate for everyday planning. Actual results can vary by environment, product specifications, personal condition, and local rules.
Guides
BMI formula
BMI is weight in kilograms divided by height in meters squared. It is a quick screening value, not a diagnosis.
Interpret with care
Muscle mass, age, pregnancy, illness, and body composition can make BMI differ from actual health status.
FAQ
Can BMI judge health by itself?
No, muscle mass, age, illness, and other factors matter.
What is the normal BMI range?
WHO commonly treats 18.5–24.9 as normal for adults.
Does this apply to children?
No, children and teens need age- and sex-specific criteria.
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