How to read BMI prime
Calculate BMI first, then divide by 25.
1
Enter height and weight
Use metric values and current measurements.
2
Read the ratio
A prime of 1.0 is exactly BMI 25; 0.9 is 90% of that limit.
3
Check the weight gap
The rows show how many kilograms separate the current weight from BMI 25.
What does this tool do?
BMI prime is BMI divided by 25, the upper end of the conventional healthy BMI range. A value below 1 is inside that range, and a value above 1 shows how far above it the BMI sits.
The Formula
BMI = weight ÷ height²; BMI prime = BMI ÷ 25Frequently Asked Questions
What does a BMI prime of 1.1 mean?
It means BMI is ten percent above 25, the upper end of the conventional healthy range. It is another way to express the same BMI.
Is BMI prime more accurate than BMI?
It carries the same information and the same limits. It does not account for muscle mass, age, ethnicity or where body fat is stored.