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BMI Prime Calculator
See how your BMI compares to the healthy limit.
BMI Prime
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BMI ÷ 25.
| BMI | — |
|---|---|
| Category | — |
| Weight | — |
| Height | — |
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Enter your figures above to see the step-by-step working.
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How the BMI Prime Calculator Works
BMI Prime is your BMI divided by 25 — the upper limit of the healthy range — so it shows at a glance how you compare to that ceiling. A BMI Prime of 1.0 sits exactly at the top of normal; below 1.0 is within the healthy range, and 1.2 marks the start of obesity. A BMI of 24.4 gives a BMI Prime of about 0.98.
The advantage is intuition: 1.15 immediately reads as “15% above the healthy limit,” which a raw BMI number doesn’t convey.
BMI Prime = BMI ÷ 25
Frequently Asked Questions
What is BMI Prime?
Your BMI divided by 25. A value of 1.0 is the top of the healthy range; higher means proportionally overweight.
What is a normal BMI Prime?
0.74 to 1.0 is the healthy range, matching a BMI of 18.5 to 25.
Why use BMI Prime?
It shows how far you are above or below the healthy limit as a simple ratio — 1.1 means 10% over.
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