BMI Calculator

BMI (Body Mass Index) is a widely used screening tool that measures body fat based on your height and weight. It helps you understand whether you are underweight, at a healthy weight, overweight, or obese — and guides you toward appropriate health decisions.

Our free online BMI Calculator gives you your BMI score instantly and tells you which category you fall into based on WHO and Indian guidelines. It supports both metric (kg/cm) and imperial (lbs/inches) units. No sign-up required.

Calculating your BMI using our tool is simple:

1. Select Unit System: Choose metric (kg & cm) or imperial (lbs & inches).
2. Enter Your Weight: E.g., 70 kg or 154 lbs.
3. Enter Your Height: E.g., 170 cm or 5 ft 7 in.
4. Click Calculate: Your BMI and health category are shown instantly.

BMI Formula (Metric):

BMI = Weight (kg) ÷ Height² (m²)

Example: Weight = 70 kg, Height = 1.70 m

BMI = 70 ÷ (1.70 × 1.70) = 70 ÷ 2.89 = 24.2

A BMI of 24.2 falls in the Normal weight category.

BMI is one of the most accessible health indicators available. Here's why monitoring it matters:

• Early Warning: BMI outside the healthy range is associated with increased risk of diabetes, heart disease, hypertension, and joint problems.
• Track Progress: Monitor your weight management journey over time.
• Doctor Guidance: Medical professionals use BMI as a starting point for health assessments.
• Free Screening: BMI is a free, non-invasive first step toward understanding your overall health.

Note for Indians: The Indian medical community recommends lower BMI thresholds. Overweight is considered BMI ≥ 23 (not 25 as per WHO global standards) for Asian populations.