Restaurant Ingredient Usage Calculator
Compare theoretical ingredient usage against actual inventory depletion to detect portion creep, kitchen over-serving, and inventory theft.
Theoretical vs Actual Ingredient Usage Formula
Theoretical Lbs = (Dishes Sold × Recipe Portion Oz) / 16; Actual Lbs = Beg Inventory + Purchases − End Inventory; Variance $ = Variance Lbs × Unit Cost- Theoretical Usage: Expected pounds of ingredient consumed based on POS sales records and recipe portion standards.
- Actual Depletion: Physical beginning inventory plus wholesale invoices minus physical ending inventory.
- Dollar Variance: Financial loss caused by portion over-scooping, unrecorded kitchen comps, or walkouts.
Step-by-Step Worked Example
Calculation Steps:
How to Use This Calculator
Assumptions & Limitations
- Dishes sold are accurate from POS itemized sales records.
- Assumes inventory weights are measured under consistent physical conditions.
Frequently Asked Questions
What is an acceptable variance between theoretical and actual food usage?
A healthy kitchen operates with less than a 3% to 5% variance between theoretical and actual ingredient usage to account for natural prep trim. A variance exceeding 8% to 10% signals severe portion over-serving, unrecorded spoilage, or theft.
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