BMI Calculator Pro
Calculate BMI, healthy weight range, BMR, and daily calorie needs instantly.
📊 Enter your weight, height, age, and gender to calculate your BMI, BMR, healthy weight range, and daily calorie needs.
How to Use the BMI Calculator
This BMI Calculator helps you estimate your Body Mass Index (BMI), healthy weight range, Basal Metabolic Rate (BMR), and daily calorie requirements using either Metric or Imperial measurements.
1. Choose Your Measurement System
Select Metric (kg, cm) or Imperial (lbs, ft, in) depending on your preferred unit system.
2. Enter Your Weight
Input your current body weight in kilograms or pounds.
3. Enter Your Height
Enter your height in centimeters or provide feet and inches when using Imperial units.
4. Enter Your Age
Age is used to estimate your Basal Metabolic Rate (BMR) and daily calorie requirements.
5. Select Your Gender
Gender is included in the BMR formula to provide a more accurate calorie estimate.
6. Review Your BMI Result
Your BMI is calculated instantly and categorized as Underweight, Normal Weight, Overweight, or Obese.
7. Check Your Healthy Weight Range
The calculator estimates a healthy weight range based on your height using standard BMI guidelines.
8. View Your BMR
BMR estimates the number of calories your body burns each day at complete rest.
9. Estimate Daily Calorie Needs
Daily calorie requirements are calculated using your BMR and common activity multipliers.
10. Review Weight Goal Calories
The calculator provides estimated calorie targets for both weight loss and weight gain goals.
BMI Formula
BMI = Weight (kg) ÷ Height² (m²)
Example:
Weight = 70 kg
Height = 1.75 m
BMI = 70 ÷ (1.75 × 1.75)
BMI = 22.9
BMI Classification Chart
Why BMI Matters
BMI is one of the most widely used health screening tools in the world. It helps identify whether a person's weight falls within a healthy range for their height.
While BMI does not directly measure body fat, muscle mass, or overall fitness, it provides a useful starting point for understanding general health and weight status.
For a complete health assessment, BMI should be considered alongside other factors such as body composition, physical activity, nutrition, and medical history.
BMI Categories
| BMI Range | Category |
|---|---|
| Below 18.5 | Underweight |
| 18.5 - 24.9 | Normal Weight |
| 25.0 - 29.9 | Overweight |
| 30+ | Obese |
BMI is a screening tool and should not be used as the sole indicator of health. Factors such as muscle mass, age, sex, and body composition can affect interpretation.
BMI Calculator FAQ
What is BMI?
BMI (Body Mass Index) estimates whether your weight is healthy for your height.
Can I use pounds and feet?
Yes. Both Metric and Imperial units are supported.
Is BMI accurate?
BMI is a useful screening tool but does not directly measure body fat percentage.
What is BMR?
BMR (Basal Metabolic Rate) estimates the calories your body burns at rest.
Do I need to create an account?
No. The BMI Calculator is completely free and works directly in your browser.
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