What this calculation means
Shared-prep allocation assigns part of a common batch cost to one recipe according to its share of the declared total allocation quantity.
The recipe allocation cannot exceed the total allocation quantity. Keep the denominator consistent across every recipe using the batch.
How to use this calculator
Enter the shared prep cost, the quantity assigned to this recipe, and the total quantity serving as the allocation denominator. Use one unit for both quantities.
Formula and variables
Allocated cost = Shared prep batch cost × Quantity allocated to this recipe ÷ Total allocated quantity
- Shared prep batch costUSD
- Total cost of shared prep.
- Quantity allocated to this recipeallocation unit
- Amount allocated to the selected recipe.
- Total allocated quantitysame unit
- Total output allocated across recipes.
Dollar amounts display to cents, with exact half-cent values rounded away from zero; intermediate calculations keep full precision.
Understand your result
The result is this recipe’s share of the shared cost. The rest remains attributable to the other output or withdrawals on the chosen basis.
Worked example
Allocate 40% of a shared prep batch costing $30.
Shared prep batch cost: 30 USD
Quantity allocated to this recipe: 40 allocation unit
Total allocated quantity: 100 same unit
- This recipe receives 40 ÷ 100 = 0.40 of the allocation basis.
- Allocate $30 × 0.40 = $12; the other share is $18.
Example result: $12.00
Frequently asked questions
Can I allocate the whole cost to each recipe?
Doing so would count the same batch more than once. Allocate each withdrawal against the common denominator and track any remaining output separately.
Does it decide an allocation policy?
No. You supply the quantities and cost basis. The tool performs the proportional allocation on that declared basis.