BMI Calculator – Instantly calculate your Body Mass Index to check your healthy weight range. Free, accurate, and easy to use for all ages and units.
Result
- Healthy BMI range: 18.5 kg/m² – 25 kg/m²
- Healthy weight for the height: — lb – — lb
- BMI Prime: 0.0
- Ponderal Index: 0.0 kg/m³
Best BMI Calculator – Check, Track & Master Your Healthy Weight
Unlock quick insights into your health with the advanced BMI Calculator from OkayCalculator. Whether you’re looking to maintain, lose, or gain weight, this tool gives reliable, instant results that help you make smarter wellness choices.
What Is a BMI Calculator?
A BMI (Body Mass Index) Calculator is a user-friendly online tool that evaluates your weight in relation to your height. It quickly indicates if you fall within a healthy range, are underweight, overweight, or obese—all with a simple calculation.
- Metric and Imperial Options: Enter your weight in kilograms/pounds or height in centimeters/meters/feet/inches for flexibility.
- Immediate Results: Instantly see your BMI, weight category, and recommended healthy range.
- Advanced Metrics: OkayCalculator also provides BMI Prime and Ponderal Index for a deeper understanding of your body composition.
How the BMI Calculator Works
- Input Your Details: Enter age, gender, height, and weight.
- Choose Units: Supports both Metric (kg/m) and US/Imperial (lb/ft/in) measurements.
- Calculate: Click the button and instantly get your BMI value, healthy weight range, and category (Normal, Underweight, Overweight, or Obese).
The BMI Formula
Metric:
BMI = weight (kg) / height² (m²)
Imperial:
BMI = (weight (lb) / height² (in²)) × 703
Example (Metric):
- Weight = 70kg, Height = 1.75m
- BMI = 70 / (1.75 × 1.75) = 22.86
Example (Imperial):
- Weight = 150lb, Height = 65in
- BMI = (150 / (65 × 65)) × 703 ≈ 24.96
BMI Categories
| BMI Range | Category |
|---|---|
| Below 18.5 | Underweight |
| 18.5 – 24.9 | Normal |
| 25.0 – 29.9 | Overweight |
| 30.0 and above | Obese |
Why Use the OkayCalculator BMI Calculator?
- Assess Health Risks: Quickly check your risk for conditions like heart disease, diabetes, and hypertension.
- Set Fitness Goals: Monitor progress as you lose or gain weight.
- Track Progress: Use over time as part of your personal health dashboard.
- Fully Free & Instant: No signup, no clutter—just fast, actionable results.
Benefits Beyond a Number
- Quick Health Insights: Assess your status in seconds.
- Customized Advice: Healthy weight range provided for your exact height and age.
- Multiple Metrics: See BMI Prime and Ponderal Index for additional health insights.
- Educational Tool: Guides lifestyle changes and healthy habits.
Also See: Calorie Calculator
Important Note
BMI is a general screening tool and does not account for muscle mass, bone density, age, or ethnicity. Always pair BMI with guidance from a healthcare professional to understand your complete health picture.
Take charge of your health journey—use the OkayCalculator BMI Calculator now to get clear, accurate answers about your body weight and wellness goals.