Blood Product Volume Calculator

Work out blood product volume instantly with clear inputs, formula shown and shareable results.

About Blood Product Volume Calculator

Converts a mL/kg blood product prescription into a total volume and infusion rate, and checks the four-hour administration limit.

Formula

Product volume

Volume = weight (kg) x mL/kg; rate = volume / transfusion hours; a typical adult red cell unit is about 280 mL

Worked example

With the default values below, Blood Product Volume Calculator returns Volume to transfuse of 250. Change any input above and every figure here is recalculated in your browser.

Inputs used

Body weightaccepts 1–150 kg: 25 kg
Volume per kilogramaccepts 2–30 mL/kg: 10 mL/kg
Transfusion timeaccepts 0.5–4 h: 3 h

Results

Volume to transfuse: 250 mL
Infusion rate: 83.3 mL/h
Equivalent adult units: 0.89
Administration window: Within the 4-hour administration limit

Step by step

1Values used
2Product volume
3Volume to transfuse= 250 mL
4Infusion rate= 83.3 mL/h
5Equivalent adult units= 0.89
6Administration window= Within the 4-hour administration limit

Assumptions and limits

The result is derived only from the 3 inputs listed above. Anything not among them is not part of the calculation.
In particular, this calculator does not take inflation, tax, fees or charges or compounding frequency into account.
Figures are rounded for display to 2 decimal places, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.
Educational estimate only. Not a substitute for professional clinical judgement, and must not be used to make treatment or dosing decisions.

How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.

Educational estimate only. Not a substitute for professional clinical judgement, and must not be used to make treatment or dosing decisions.

Frequently Asked Questions

What volumes are typical?

Red cells 10 to 15 mL/kg, plasma 10 to 20 mL/kg and platelets 10 to 15 mL/kg in children.

Why the four-hour limit?

Bacterial proliferation risk rises once a unit has been out of controlled storage for four hours.