Loading…
Calculate your Body Mass Index and see your healthy weight range.
Healthy weight
| BMI Range | Category |
|---|---|
| Below 18.5 | Underweight |
| 18.5 – 24.9 | Healthy weight |
| 25.0 – 29.9 | Overweight |
| 30.0 – 34.9 | Obese (Class I) |
| 35.0 – 39.9 | Obese (Class II) |
| 40.0 and above | Obese (Class III) |
⚕️ This calculator is for adults aged 20+ and is a general screening tool, not a medical diagnosis. BMI does not distinguish between muscle and fat, so very muscular people may score high without being unhealthy. Consult a doctor for personalized advice.
BMI(Body Mass Index) is a number calculated from your height and weight that gives a rough indication of whether your weight is in a healthy range. It's the most widely used screening tool for weight categories: underweight, healthy weight, overweight, and obese. The standard was developed in the 1830s by Belgian mathematician Adolphe Quetelet and adopted by the World Health Organization for population-level health statistics.
The calculation is simple:
For example, someone who is 170 cm and 65 kg: 65 ÷ (1.70 × 1.70) = 22.5, placing them in the healthy weight range.
BMI is a useful screening tool, but it has real limitations. It measures total weight relative to height, but it cannot tell the difference between fat, muscle, bone, and water. This matters:
This calculator also shows the weight range that corresponds to a BMI of 18.5–24.9 for your height. If your current weight falls within this range, your BMI is in the healthy category. If you're above or below, the range gives you a concrete target.
For a more complete picture of health, consider these complementary measurements:
Disclaimer: This tool is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Results are estimates and should be discussed with a qualified healthcare provider before making health-related decisions.
The BMI Calculator lets you figure out bmi calculatorinstantly, without reaching for a spreadsheet or doing the math by hand. Whether you're planning a budget, checking a loan, or working through homework, the tool applies the correct formula behind the scenes and shows the result the moment you enter your numbers.
Unlike a static chart or table, this calculator adapts to your exact inputs. You can adjust any value and see the outcome update in real time, which makes it easy to compare scenarios — for example, "what if the rate were 1% lower?" or "what if I paid an extra $50 a month?"
Common uses: people reach for this tool when they need to find a bmi calculator for women, bmi calculator by age and gender, bmi prime and healthy range, or bmi calculator men over 50.
Browser-based tools like this one have a few real advantages over installed software or manual methods:
The BMI Calculator is based on the following formula:
BMI = weight(kg) / height(m)^2
Variables: BMI = Body Mass Index (kg/m^2) weight = Body weight (kilograms) height = Height (meters) Imperial variant: weight(lb) in pounds, height(in) in inches, multiplied by 703
Metric BMI. For imperial units, use BMI = 703 × weight(lb) / height(in)². WHO adult categories: 18.5–24.9 is the healthy range.
Worked example: Step 1: Weight 70 kg, height 1.75 m. Step 2: height^2 = 1.75 × 1.75 = 3.0625. Step 3: BMI = 70 ÷ 3.0625 ≈ 22.9. Result: BMI ≈ 22.9, inside the healthy range of 18.5-24.9.
More tools you might find useful