BMI Calculator
Calculate body mass index, weight category, and healthy weight range with metric or imperial units in one clear view.
BMI Calculator
Check body mass index and healthy weight range without switching formulas
Body measurements
Body mass index
Normal22.9
Adult BMI estimate. Healthy range: 18.5 to 24.9.
Weight category
Normal
Healthy weight range
56.7 - 76.3 kg
Current weight
70 kg
Height
175 cm
Healthy BMI band
18.5 - 24.9
Practical guidance
You are currently within the standard healthy BMI range. Maintain your current habits unless a clinician gives more specific guidance.
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Frequently Asked Questions
How is BMI calculated?
BMI is calculated as weight divided by height squared. In metric units, the formula is kg / m². In imperial units, the calculator converts your inputs into metric values before applying the same standard formula.
What BMI range is considered healthy?
For most adults, a BMI from 18.5 to 24.9 is considered the standard healthy range. Below that is underweight, 25.0 to 29.9 is overweight, and 30.0 or above is obese.
Does the calculator show a healthy weight range?
Yes. Based on your current height, it calculates the body weight that corresponds to a BMI between 18.5 and 24.9, then displays that range in your active unit system.
Is BMI enough to judge health?
No. BMI is a quick screening metric, not a diagnosis. Muscle mass, body composition, age, pregnancy, and medical history can all change how the number should be interpreted.