BMI Calculator
Calculate your Body Mass Index (BMI) online using height and weight. Get your BMI score, weight category, visual BMI scale, and estimated healthy weight range instantly.
Enter Details
Enter Height & Weight
Enter your height and weight above to calculate your exact Body Mass Index score, category, and healthy weight range.
How is BMI calculated?
BMI is calculated by dividing weight in kilograms by height in meters squared: BMI = weight (kg) ÷ height² (m²). For a person 175 cm tall weighing 70 kg, BMI = 70 ÷ (1.75 × 1.75) = 22.9 (Normal weight).
What is BMI Calculator?
A Body Mass Index (BMI) Calculator measures a person's body mass relative to their height. It is a standard screening metric used globally to classify adult body weight into Underweight, Normal weight, Overweight, and Obesity categories.
Who Needs It?
Adults, fitness enthusiasts, athletes, health conscious individuals, and wellness seekers checking their body weight status.
Problem Solved
Provides instant feedback on whether your weight falls within a healthy range for your height, along with an estimated target healthy weight range.
How to Calculate Your BMI Online
- 1
Select Units
Choose Metric (cm, kg) or US Imperial (feet, inches, lbs).
- 2
Enter Height
Input your height in centimeters or feet and inches.
- 3
Enter Weight
Input your body weight in kilograms or pounds.
- 4
Review BMI Score
Instantly see your BMI score, category tag, visual gauge marker, and healthy weight range.
Common Uses for BMI Calculator
Screening adult body weight status for personal health and fitness goals.
Estimating target healthy body weight range based on height.
Tracking fitness and weight loss progress over time.
Comparing metric (cm/kg) vs imperial (ft/in/lb) height and weight standards.
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Frequently Asked Questions
What is considered a normal adult BMI?
A BMI between 18.5 and 24.9 is considered the standard healthy normal-weight range for adults.
Is my height and weight data uploaded to a server?
No. All calculations take place 100% locally inside your web browser. No health or body data is sent to any server.
Does BMI directly measure body fat?
No. BMI is a screening measure calculated purely from height and weight. It does not distinguish between muscle mass and fat mass.
Can children and teens use this adult BMI calculator?
No. Children and teenagers (ages 2–19) use age-and-gender-specific BMI percentile charts rather than fixed adult thresholds.
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