Compounding Formula Quantity Calculator

Work out compounding formula quantity instantly with clear inputs, formula shown and shareable results.

About Compounding Formula Quantity Calculator

Scales each ingredient of a master formula by the ratio of the required batch size to the master batch size.

Formula

Formula scaling

Ingredient required = master formula quantity x (required batch size / master batch size)

Worked example

With the default values below, Compounding Formula Quantity Calculator returns Ingredient required of 5.0000. Change any input above and every figure here is recalculated in your browser.

Inputs used

Master formula batch sizeaccepts 0.1–100,000 g: 100 g
Ingredient quantity in the master formulaaccepts 0.001–100,000 g: 2 g
Batch size requiredaccepts 0.1–100,000 g: 250 g

Results

Ingredient required: 5.0000 g
Scale factor: 2.5000
Ingredient share of the formula: 2.0000%
Batch size: 250.00 g

Step by step

1Values used
2Formula scaling
3Ingredient required= 5.0000 g
4Scale factor= 2.5000
5Ingredient share of the formula= 2.0000
6Batch size= 250.00 g

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 4 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

Should an excess be prepared?

A small overage is common to allow for transfer losses, but it must be documented in the compounding record.

What limits scaling down?

The minimum weighable quantity of the balance; below it, an aliquot or trituration method is required.