BMI Prime Calculator

Use the BMI Prime to work through bMI Prime from the values you enter. Review the notes below the result so you understand what the figure represents.

Weight (kg)

Height (cm)

BMI Prime

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BMI—

This is an estimate for general guidance, not medical advice. For a plan that fits you, talk to a doctor or qualified professional.

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How it works

BMI Prime = BMI ÷ 25

How to use the BMI Prime

Enter the requested values and start with one realistic example. Read the result together with its unit or label, then change one input at a time if you want to compare options.

This is a general estimate and cannot replace advice from a qualified health professional.

Frequently Asked Questions

How does the BMI Prime Calculator work?

See your BMI and BMI Prime, the ratio of your BMI to the upper healthy limit of 25.

Is this medical advice?

No. It gives general estimates only. For decisions about your health, speak with a qualified professional.

Can I use the result as an exact answer?

Treat it as an estimate or check unless the page and the rules that apply to you confirm otherwise. Rounding, fees and personal details can change the final result.