Use Plasma Volume mL when you need to compute the plasma volume as blood volume times one minus the hematocrit fraction. Enter Blood volume and Hematocrit fraction using the definitions and units below so the result can be reproduced.

Blood volume

A finite measured or assumed value, expressed in mL.

Hematocrit fraction

A finite measured or assumed value from 0 through 1.

The published tool contract uses this rule: Compute the plasma volume as blood volume times one minus the hematocrit fraction.

Plasma volume

The calculated plasma volume in mL.

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. Hematocrit fraction must remain between 0 and 1.

Retain the original Blood volume and Hematocrit fraction values and their units alongside the result. Stroke Volume mL is useful when you instead need to compute stroke volume as end-diastolic volume minus end-systolic volume. Red Cell Mass mL provides another view by helping you compute the red cell mass as blood volume times the hematocrit fraction.

• Stroke Volume mL

  Compute stroke volume as end-diastolic volume minus end-systolic volume.

• Red Cell Mass mL

  Compute the red cell mass as blood volume times the hematocrit fraction.

• MCV Calculator

  Compute mean corpuscular volume from hematocrit and red blood cell count.