BMI Calculator
About the BMI Calculator
The BMI Calculator by Getsmore helps you quickly determine your Body Mass Index (BMI) using your height and weight. You can enter height in centimeters (cm) or directly in feet and inches (ft/in). BMI is a widely used screening method to understand whether your body weight falls within a healthy range for your height.
This tool is designed for instant results, works fully in your browser, and does not store or track any personal data.
What Is BMI (Body Mass Index)?
Body Mass Index (BMI) is a numerical value calculated from a person’s weight and height. It provides a simple way to categorize weight status and assess potential health risks related to body fat.
BMI is commonly used by doctors, fitness professionals, and health organizations as an initial health indicator, not a medical diagnosis.
How the BMI Calculator Works
Using the Getsmore BMI Calculator is simple:
- Enter your weight (in kilograms).
- Select your preferred height unit (Centimeters or Feet & Inches).
- Enter your height (in cm or ft + in).
- Instantly see your BMI value and weight category.
All calculations happen locally in your browser, ensuring complete privacy.
BMI Formula Used
The standard BMI formula is: BMI = weight (kg) ÷ height² (m²)
When entering height in feet and inches, the calculator converts it automatically: 1 foot = 12 inches = 0.3048 meters.
BMI Categories Explained
Based on World Health Organization (WHO) standards:
- Underweight: BMI below 18.5
- Normal Weight: BMI between 18.5 – 24.9
- Overweight: BMI between 25 – 29.9
- Obese: BMI 30 or higher
These categories help identify potential health risks associated with being underweight or overweight.
Why Use the Getsmore BMI Calculator?
- ⚡ Instant & Accurate Results
- 📏 Supports Direct Feet & Inches (ft + in) Input
- 🔒 Privacy-First (No data stored)
- 📱 Works on Mobile & Desktop
- 🆓 100% Free to Use
Example BMI Calculation
If a person is 5 feet 9 inches (approx. 175 cm) tall and weighs 70 kg:
Weight: 70 kg
BMI = 70 ÷ (1.7526 × 1.7526)
BMI ≈ 22.8 → Normal Weight
Important Health Disclaimer
BMI is a general screening tool and does not account for muscle mass, bone density, age, or gender. Athletes and highly muscular individuals may have a higher BMI without increased health risk.
For medical advice or personalized health assessments, always consult a qualified healthcare professional.
Frequently Asked Questions
Yes! Switch the height unit tab to 'ft + in' and enter your feet and inches directly.
Yes, the Getsmore BMI Calculator is completely free and unlimited.
No. All calculations happen locally in your browser. No data is stored or shared.
This calculator is designed for adults. BMI interpretation for children and teens requires age-specific charts.
Yes, it provides precise results based on standard mathematical formulas.