How is BMI calculated?

Metric: weight (kg) ÷ height (m)². Imperial: (weight in lbs ÷ height in inches²) × 703.

What is a healthy BMI?

A BMI between 18.5 and 24.9 is considered normal weight for adults.

Is BMI accurate for athletes?

BMI may overestimate body fat in muscular people. It does not distinguish muscle from fat.

Yes. Select Metric mode for kilograms and centimeters.

Is BMI calculator free?

Yes. WorkUtilities BMI Calculator is free with no signup required.

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BMI Calculator — Body Mass Index

Calculate your Body Mass Index with metric or imperial units. Instant category results.

Weight (kg)

Height (cm)

How It Works

Enter

Enter your weight and height

Calculate

Click calculate to get your BMI

See Category

View your BMI category and healthy range

Help Us Improve

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About BMI Calculator

Our free BMI Calculator computes your Body Mass Index using metric (kg/cm) or imperial (lbs/inches) units. Get instant BMI value, category, and healthy weight range.

BMI is a widely used screening tool for weight categories. Results include a visual scale showing where you fall across underweight, normal, overweight, and obese ranges.

Useful for health awareness, fitness planning, and general wellness tracking. Remember BMI does not account for muscle mass or body composition.

Read the full guide: BMI calculator — what your body mass index means

When Should You Use BMI Calculator?

Health check

Get a quick BMI reading for general wellness awareness.

Fitness goals

Track BMI changes alongside diet and exercise programs.

Medical forms

Calculate BMI before filling health or insurance forms.

Weight planning

See your healthy weight range based on height.

Unit conversion

Switch between metric and imperial units easily.