BMI Calculator

Body mass index (BMI) is a measure of body fat based on height and weight that applies to adult men and women.

Personal Information

Age

Gender

Activity Level

Body Measurements

Height

Weight

Please fix the errors above before calculating

Your BMI is

and you are

Your ideal weight range is

Body Fat

Estimated

BMR

cal/day

Daily Calories

with activity

Health Risk Assessment

Classification:

Health Risk:

Recommendations

Share Your Results

BMI Categories and Health Risk

Underweight

< 18.5

Low Risk

Normal Weight

18.5 - 24.9

Healthy

Overweight

25 - 29.9

Moderate Risk

Obese

≥ 30

High Risk

BMI History

Date	BMI	Weight	Category

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How to Use

Step-by-step guide 6 steps

1 Select measurement system (Metric or Imperial)
2 Enter your weight (kg or lbs)
3 Enter your height (cm or feet/inches)
4 Click "Calculate BMI"
5 View your BMI number and weight category
6 Review health recommendations based on your category

FAQ

Common questions 5 questions

What is BMI?

Body Mass Index is a measure of body fat based on height and weight, used to categorize weight status from underweight to obese.

What is a healthy BMI?

18.5-24.9 is considered healthy weight. Under 18.5 is underweight, 25-29.9 is overweight, 30+ is obese.

Is BMI accurate for everyone?

BMI is a screening tool but has limitations. Athletes, bodybuilders, elderly, and pregnant women may get inaccurate classifications.

How often should I check BMI?

Monthly or quarterly checks are sufficient for tracking weight management progress.

What should I do with my results?

Use BMI as one indicator. Consult healthcare professionals for personalized health assessments and recommendations.

Use Cases & Examples

Real-world applications 4 examples

Weight Management

Track BMI changes during diet and exercise programs to measure progress.

Health Screening

Quick initial assessment before consulting healthcare providers.

Fitness Planning

Set realistic weight goals based on healthy BMI ranges for your height.

Insurance/Medical

Some insurance and medical applications require BMI information.