Systemic Immune-Inflammation Index Calculator

About Systemic Immune-Inflammation Index Calculator

SII from platelets, neutrophils and lymphocytes. The Systemic Immune-Inflammation Index Calculator on Picscaler gives you the answer instantly in your browser, with no sign-up.

Inputs: Platelets (x10^3/uL), Absolute neutrophils (x10^3/uL) and Absolute lymphocytes (x10^3/uL). Results shown: SII.

Formula: SII = platelets x neutrophils / lymphocytes (all in x10^3/uL = x10^9/L, the unit used for published cut-offs; divide cells/uL values by 1000 first). Reference intervals vary by age, sex, method and laboratory. Results support, and do not replace, clinical judgement.

This tool is for education and information. It does not replace clinical judgement, so confirm results against your laboratory's reference ranges and local guidelines.

How to use Systemic Immune-Inflammation Index Calculator

1. Enter Platelets (x10^3/uL), Absolute neutrophils (x10^3/uL) and Absolute lymphocytes (x10^3/uL).
2. Press Calculate.
3. Read SII in the result table.
4. Use the formula and notes under the result to check the working.

Frequently asked questions

Is Systemic Immune-Inflammation Index Calculator free?

Yes. Systemic Immune-Inflammation Index Calculator is completely free to use on Picscaler.

Do I need to create an account?

No. You can use it straight away without signing up.

Is my data safe?

Your input is processed in your browser on your own device and is not uploaded to Picscaler.

Can I use it for medical decisions?

No. It is an educational aid and does not replace professional medical judgement.