Dilution For Injection Calculator

Work out dilution for injection instantly with clear inputs, formula shown and shareable results.

About Dilution For Injection Calculator

Applies the C1V1 equals C2V2 relationship to find the stock volume and diluent needed for a required final concentration.

Formula

Dilution

V1 = C2 x V2 / C1, where V1 is the stock volume; diluent = V2 - V1

Worked example

With the default values below, Dilution For Injection Calculator returns Stock solution to draw up of 1.000. Change any input above and every figure here is recalculated in your browser.

Inputs used

Stock concentrationaccepts 0.01–5,000 mg/mL: 100 mg/mL
Desired concentrationaccepts 0.01–5,000 mg/mL: 10 mg/mL
Final volume requiredaccepts 0.1–1,000 mL: 10 mL

Results

Stock solution to draw up: 1.000 mL
Diluent to add: 9.000 mL
Dilution factor: 10.00
Total drug in the syringe: 100.00 mg

Step by step

1Values used
2Dilution
3Stock solution to draw up= 1.000 mL
4Diluent to add= 9.000 mL
5Dilution factor= 10.00
6Total drug in the syringe= 100.00 mg

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

Which diluent should be used?

The one specified in the product literature; some drugs are incompatible with glucose or with sodium chloride.

Does drug volume count?

Yes, which is why the diluent is the final volume minus the stock volume rather than the full final volume.