SII & SIRI Calculator

Value in 10⁹/L
Neutrophils are the body's first line of defense against infections. They destroy bacteria and fungi.
Value in 10⁹/L
Lymphocytes are key cells of the immune system. They defend against viruses and other pathogens.
Value in 10⁹/L (for SII calculation)
Platelets are cells responsible for blood clotting. They help stop bleeding.
Value in 10⁹/L (for SIRI calculation)
Monocytes are large white blood cells that fight infections. They clean up dead cells and bacteria.
Calculation Results

SII (Systemic Immune-Inflammation Index)

-

Formula: (Neutrophil × Platelet) / Lymphocyte

SIRI (Systemic Inflammation Response Index)

-

Formula: (Neutrophil × Monocyte) / Lymphocyte

SII & SIRI What Are They ?

SII (Systemic Immune-Inflammation Index) and SIRI (Systemic Inflammation Response Index) are supportive indicators calculated from complete blood count (CBC) parameters. These values do not establish a diagnosis on their own; they should be evaluated by a physician together with clinical findings and other tests.

How is it calculated ?

  • SII = (Neutrophil × Platelet) / Lymphocyte

  • SIRI = (Neutrophil × Monocyte) / Lymphocyte

Which values are entered?

  • NEU (Neutrophil)

  • (Lymphocyte)

  • PLT (Platelet)

  • MONO (Monocyte)