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Calculate your Body Mass Index instantly. See your BMI category, where you fall on the scale, and your healthy weight range.
| Category | BMI Range |
|---|---|
| Underweight | Below 18.5 |
| Normal | 18.5 - 24.9 |
| Overweight | 25.0 - 29.9 |
| Obese | 30.0 and above |
Check your Body Mass Index in seconds — no signup, no tracking, nothing sent to any server. Enter your weight and height to see your BMI number, category, and healthy weight range. Whether you are training at the gym, tracking fitness progress, or just curious, this calculator gives you a quick health snapshot. Built for anyone focused on fitness and well-being.
BMI is calculated by dividing your weight in kilograms by the square of your height in meters: BMI = kg/m². For imperial units, the formula is BMI = (weight in lbs × 703) / (height in inches)². A BMI between 18.5 and 24.9 is considered a normal, healthy range for most adults.
BMI categories defined by the WHO and CDC for adults 20 and older: Underweight = below 18.5, Normal weight = 18.5 to 24.9, Overweight = 25.0 to 29.9, Obese = 30.0 and above. These are general guidelines — individual health depends on many factors beyond BMI alone.
BMI has limitations for muscular athletes, bodybuilders, and regular gym-goers because it does not differentiate between muscle mass and body fat. A person with significant muscle mass may show a high BMI despite having low body fat. If you lift weights regularly or train seriously, consider supplementing BMI with body fat percentage measurements or DEXA scans for a more complete picture of your fitness level.
A healthy weight depends on your height. This calculator shows the healthy weight range (BMI 18.5-24.9) for your specific height after you enter your measurements. For reference, a person who is 5'10" has a healthy weight range of roughly 129-174 lbs. Use this as a general guide alongside your fitness goals and body composition.