Use Ferritin Per Iron Ratio when you need to compute the ratio of ferritin in nanograms per millilitre to serum iron in micrograms per decilitre. Enter Ferritin and Serum iron using the definitions and units below so the result can be reproduced.

Ferritin

A finite measured or assumed value greater than or equal to 0, expressed in ng/mL.

Serum iron

A finite measured or assumed value, expressed in µg/dL.

The published tool contract uses this rule: Compute the ratio of ferritin in nanograms per millilitre to serum iron in micrograms per decilitre.

Ferritin to iron ratio

The calculated ferritin to iron ratio.

A ratio or percentage can conceal the scale of its numerator and denominator and becomes sensitive to measurement error when the denominator is small. It is informational and cannot diagnose a condition, select treatment, or replace professional interpretation of the original measurements.

Retain the original Ferritin and Serum iron values and their units alongside the result. Iron Deficiency Indicator is useful when you instead need to flag iron deficiency when ferritin is below thirty nanograms per millilitre and transferrin saturation is below twenty percent. INR Ratio provides another view by helping you compute the international normalized ratio as (patient PT / mean normal PT)^ISI. Use the International Sensitivity Index assigned to the specific thromboplastin reagent and instrument; the default of one is only appropriate when that is the calibrated ISI.

• Iron Deficiency Indicator

  Flag iron deficiency when ferritin is below thirty nanograms per millilitre and transferrin saturation is below twenty percent.

• INR Ratio

  Compute the international normalized ratio as (patient PT / mean normal PT)^ISI. Use the International Sensitivity Index assigned to the specific thromboplastin reagent and instrument; the default of one is only appropriate when that is the calibrated ISI.

• BUN Creatinine Ratio

  Compute the blood urea nitrogen to serum creatinine ratio.