Ingredient price-change impact calculator

What this calculation means

Ingredient price-change impact isolates a manually entered price difference while the formulation and measured yield stay fixed. Matching-basis mode costs the quantity directly; AP-price mode converts an edible-portion recipe quantity to its as-purchased requirement first.

No prices are retrieved. AP yield must be positive and at most 100%; never apply it again to an already yield-adjusted EP price. Blank price basis uses matching basis and performs no yield adjustment. The optional serving count must be positive and use the same portion definition.

How to use this calculator

Normalize old and new prices to the same unit and valuation basis. Choose matching basis when quantity and price already align, including prices already adjusted to EP. For AP prices with an EP recipe quantity, explicitly choose that mode and enter the same measured yield for both prices. Optionally enter positive batch servings for a per-serving change. Supply current batch recipe cost only when it includes the entire old line; the result then also shows a revised batch total and, if servings are entered, revised cost per serving.

Formula and variables

Matching-basis delta = (New unit price − Old unit price) × Recipe quantity; AP-price delta = (New AP unit price − Old AP unit price) × EP quantity ÷ (Fixed yield percentage ÷ 100); Per-serving delta = Batch delta ÷ Batch servings; Optional revised batch cost = Current batch cost + Line delta

Old unit priceUSD / unit

Old comparable unit price, on the same AP or already usable basis as the new price.

New unit priceUSD / unit

New comparable unit price. Convert pack sizes before comparing them.

Recipe quantitymatching quantity unit

Quantity matching the price unit, or usable EP quantity when AP-price mode is explicitly chosen.

Price basis

Matching basis performs no yield conversion. AP prices with EP quantity divide the quantity by the entered fixed yield.

Fixed usable yield%

Measured usable yield, required for AP mode only. Blank is required on matching basis to prevent double-adjustment.

Current batch recipe costUSD

Optional current batch ingredient cost, including this old ingredient line. Revised batch cost equals the supplied total plus the line delta.

Batch servingsservings

Optional positive batch servings; changes the supplementary per-serving delta, not the batch delta.

Dollar amounts display to cents, with exact half-cent values rounded away from zero; intermediate calculations keep full precision.

Understand your result

The primary result is the signed ingredient cost change. Details show the quantity valued at the entered prices, old and new line costs, and optional change per equivalent serving. A yield change or a changed recipe quantity requires a different comparison.

Worked example

At a fixed 80% yield, compare AP prices of $3.00 and $3.50 per lb for 4 lb usable recipe quantity and 10 servings.

1. AP quantity required = 4 lb usable ÷ 0.80 = 5 lb AP.
2. Old line cost = 5 × $3.00 = $15. New line cost = 5 × $3.50 = $17.50.
3. Batch change = $17.50 − $15 = $2.50. Per-serving change = $2.50 ÷ 10 = $0.25.
4. If the current batch costs $30 including the old $15 line, revised batch cost = $30 + $2.50 = $32.50; at 10 servings this is $3.25 per serving.

Example result: $2.50

Frequently asked questions