How to Calculate Food Cost Percentage

The two formulas

The plate version tells you whether a single item is priced right. The period version tells you whether the whole operation hit its number, because it counts everything that left the shelf: sold, wasted, over-portioned or walked out the back door. You need both, and the gap between them is its own diagnostic, covered in theoretical vs actual food cost.

Worked example, per plate

A burger with a fully costed portion at $3.09 sells for $11.95. Food cost percentage: 3.09 ÷ 11.95 = 25.9 percent. Run the same math in reverse to price a new item: a $0.81 cookie at a 30 percent target prices at 0.81 ÷ 0.30 = $2.69, which the menu rounds to $2.75. The portion cost has to be real for either direction to mean anything, which is what costing the recipe properly, including yield, is for.

Worked example, per period

Input		Amount
Beginning inventory	counted on the 1st	$8,200
Purchases	all food invoices in the period	$11,400
Ending inventory	counted on the 31st	$7,600
Cost of goods used	8,200 + 11,400 − 7,600	$12,000
Food sales	same period	$40,000
Food cost percentage	12,000 ÷ 40,000	30.0%

Sample numbers for illustration. Three details decide whether this number is trustworthy: count inventory at consistent times, value the counts at current invoice prices rather than old ones, and include every food invoice, including the ones that arrive as paper in a kitchen drawer. Missing invoices understate the number now and detonate it next month.

What a good food cost percentage looks like

There is no single correct number, and anyone quoting one for every restaurant is guessing. Common working targets sit around 28 to 35 percent for full service, with quick service and bars often leaner and high-labor fine dining sometimes deliberately higher, because the plate carries prep the guest pays for elsewhere on the P&L. Treat the range as a starting point. What matters more than the level is the trend, and whether you see a move the week it happens or the month after.

The five mistakes that skew the number

• Stale ingredient prices. The invoice repriced chicken; the spreadsheet did not. Every plate cost using chicken is now fiction.
• Skipping yield. Costing what you buy instead of what you serve understates cost on every trimmed ingredient.
• Unit slips. A case price divided into the wrong unit poisons the line silently. The recipe cost calculator exists partly to make this mistake impossible.
• Inconsistent counts. Inventory taken Tuesday morning one month and Sunday night the next moves the number without anything real changing.
• Credits and transfers ignored. Vendor credits, staff meals and inter-store transfers all belong in the math or the percentage drifts from reality.

How operators keep this current at scale

Every mistake above shares one root: the numbers live in documents nobody has time to maintain. The alternative is a system where the invoice itself updates the math. Culvana reads each vendor invoice the day it arrives, updates ingredient costs, reprices every affected recipe, and depletes inventory as the POS sells, so plate and period food cost stay live instead of being reconstructed at month end. Check what that is worth against your current stack in the savings calculator.

Common questions

What is the food cost formula?

Per plate: portion cost divided by menu price. Per period: beginning inventory plus purchases minus ending inventory, divided by food sales. Both run free in the food cost calculator.

Is food cost the same as COGS?

Food cost is the food portion of cost of goods sold. Add beverage and packaging for full COGS; add labor for prime cost.

What is a good food cost percentage?

Concept-dependent. Common full-service targets sit around 28 to 35 percent; your own trend beats any benchmark.

How often should I calculate it?

Per period, at least monthly with real counts. Per plate, every time an ingredient reprices, which is why automation wins.