Vaccine Dose Volume Calculator

Work out vaccine dose volume instantly with clear inputs, formula shown and shareable results.

About Vaccine Dose Volume Calculator

Divides the usable vial volume by the dose volume to give the number of full doses obtainable, including any labelled overfill.

Formula

Doses per vial

Doses = floor(vial volume x (1 + overfill) / dose volume); residual = usable volume - doses x dose volume

Worked example

With the default values below, Vaccine Dose Volume Calculator returns Doses per vial of 10. Change any input above and every figure here is recalculated in your browser.

Inputs used

Usable volume per vialaccepts 0.1–50 mL: 5 mL
Dose volumeaccepts 0.05–5 mL: 0.5 mL
Vial overfillaccepts 0–20: 0

Results

Doses per vial: 10
Volume drawn as full doses: 5.00 mL
Volume left unusable: 0.000 mL
Usable volume including overfill: 5.00 mL

Step by step

1Values used
2Doses per vial
3Doses per vial= 10
4Volume drawn as full doses= 5.00 mL
5Volume left unusable= 0.000 mL
6Usable volume including overfill= 5.00 mL

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 3 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

Why floor rather than round?

A partial dose cannot be given, so any remainder is discarded.

Can low dead-space syringes help?

Yes. They recover the volume normally trapped in the needle hub, which is how extra doses were obtained from COVID-19 vials.