BMI Prime Calculator
Calculate BMI Prime, the ratio of your BMI to the upper limit of the normal range, with a category readout.
BMI Prime
0.91
Normal weight
BMI22.9
BMI Prime expresses your Body Mass Index as a simple ratio to the upper bound of the normal weight range (25), so a value of 1.0 means you're right at that boundary. Enter your height and weight to see your BMI and BMI Prime instantly, calculated in your browser.
How to use
- Enter your weight in kilograms and height in centimeters.
- Read your BMI and the derived BMI Prime ratio.
- Check the category to see where you fall relative to the normal range.
Frequently asked questions
- What is BMI Prime?
- BMI Prime is your BMI divided by 25, the upper limit of the normal BMI range, so values under 1.0 fall within or below the normal range.
- Why use BMI Prime instead of BMI?
- BMI Prime makes it immediately clear how far above or below the normal weight boundary you are, as a simple ratio.
- Is BMI Prime more accurate than BMI?
- It shares the same limitations as BMI, including not accounting for muscle mass or body composition, but presents the result differently.