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Restaurant Food Cost & Inventory Waste Calculator

See exactly where money leaks through food cost, waste, spoilage, overstock, and shrinkage — and how much you could save by tightening inventory control.

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Your numbers

Use one typical month. Estimates are fine.

Sales & purchases
$
$

Food, beverage, and everything else

$
Inventory counts
$
$
Where money leaks
$

Spoilage, over-prep, trim, mistakes

$

Excess stock beyond what you need

$
Operations
$
Targets & cost structure
%
%
%
%
0/ 100
Inventory health score
Major profit leak — urgent
Food cost 36.5% vs target 30.0%
Cost of goods sold (COGS)
$19,000
Begin inv + purchases − end inv
Current food cost
36.5%
+6.5 pts vs target
Monthly waste loss
$2,300
$27,600 per year
Gross profit (food)
$33,000
Food sales − COGS
Overstock
27.3%
of on-hand inventory
Shrinkage / theft
1.5%
of food sales
Food cost vs target
Your food cost36.5%
Target food cost30.0%
Where money leaks each month
Waste / spoilage$1,500
Theft / shrinkage$800
Overstock (tied-up cash)$3,000
Potential savings from reducing waste & shrinkage
−10%
$230
/mo
$2,760
/yr
−20%
$460
/mo
$5,520
/yr
−30%
$690
/mo
$8,280
/yr

Overstocked: you are holding roughly 16 days of inventory. Order smaller quantities more frequently to free up cash and cut spoilage.

Plain-English diagnosis

Your food cost is 36.5%, which is 6.5 points above your 30.0% target. Closing that gap on $52,000 of food sales is worth about $3,400 per month.

Waste and spoilage are running at 2.9% of sales ($1,500/mo). Waste appears to be a major profit leak — tighten prep forecasting, rotation, and portioning.

Overstock is 27.3% of your on-hand inventory. Your inventory may be overstocked, tying up cash and driving spoilage.

Estimated theft/shrinkage is 1.5% of sales. Audit receiving, voids, and comps, and lock down high-value stock.

You may benefit from inventory software or tighter weekly counting to bring these numbers under control.

Prime cost (food + labor): 66.5% · Rough operating margin after food, labor & rent: 25.5%
Compare restaurant inventory software

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Best food cost software

Recipe costing, variance, and profitability tools, compared.

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How to Use This Restaurant Food Cost Calculator

Pull the numbers from one typical month: your food sales, total revenue, food purchases, and your beginning and ending inventory values. Then estimate the dollars lost to waste and spoilage, overstock, and theft or shrinkage. You do not need perfect data — reasonable estimates from a single weekly count are enough to expose where profit is leaking. The calculator updates instantly, scores your inventory control out of 100, and translates the math into plain-English next steps. Use the free inventory template if you need a structured way to gather these figures.

Food Cost Percentage Formula

Food cost percentage is the share of food sales spent on the ingredients that produced them:

Food cost % = COGS ÷ Food sales × 100
COGS = Beginning inventory + Purchases − Ending inventory

For example, with $12,000 beginning inventory, $18,000 in purchases, and $11,000 ending inventory, your COGS is $19,000. On $52,000 of food sales that is a 36.5% food cost. Most operators aim for 28-35%. For a deeper walkthrough with more examples, read how to calculate food cost percentage.

How Inventory Waste Hurts Restaurant Profit

Restaurants run on thin margins, so every dollar of waste, spoilage, over-ordering, and shrinkage comes almost directly out of profit. A kitchen losing 4-5% of sales to waste is effectively working several shifts a month for free. Overstock makes it worse: excess inventory ties up cash, hides theft, and quietly spoils on the shelf. Because these losses repeat every single month, they compound — which is why tightening control is one of the highest-return moves an operator can make.

How Much Can Restaurants Save by Reducing Waste?

The savings blocks above model cutting your waste and shrinkage by 10%, 20%, and 30%. Take a restaurant losing $2,300 a month to waste and theft: a 20% reduction returns about $460 a month, or roughly $5,500 a year, straight to the bottom line — with no extra sales required. Reaching those targets usually comes down to consistent weekly counts, better prep forecasting, portion control, and locking down receiving.

When Should You Use Inventory Software?

Spreadsheets are perfect when you run a single small location with a simple menu. You should consider dedicated restaurant inventory software once you manage multiple locations, juggle hundreds of SKUs and recipes, need real-time theoretical-vs-actual variance, or spend hours every week on manual counts. At that point the time saved and waste prevented typically more than covers the subscription. If recipe costing and profitability are your focus, compare the best food cost software for restaurants.

FAQ

What is a good food cost percentage for a restaurant?

Most restaurants target a food cost percentage between 28% and 35% of food sales. Full-service restaurants often sit around 28-32%, while bars and quick-service concepts vary more. The right number depends on your concept, menu mix, and pricing — the goal is a consistent figure at or below the target you set for your business.

How do I calculate food cost percentage?

Food cost percentage = Cost of Goods Sold (COGS) divided by food sales, multiplied by 100. COGS = beginning inventory + purchases - ending inventory. For example, if your COGS is $19,000 and food sales are $52,000, your food cost percentage is about 36.5%.

How do I calculate restaurant inventory waste?

Estimate the dollar value of food thrown away due to spoilage, over-prep, and trim, then add losses from theft and shrinkage. Expressed as a percentage of sales, anything consistently above 4-5% signals a meaningful profit leak. Weekly counts and a simple waste log make this number far more accurate.

How much money can a restaurant save by reducing food waste?

If a restaurant loses $2,300 a month to waste and shrinkage, cutting that by 20% saves about $460 a month, or roughly $5,500 a year — straight to the bottom line. Because these losses repeat every month, even small percentage reductions compound quickly.

When should a restaurant stop using spreadsheets and use inventory software?

Spreadsheets work well for a single small location with a simple menu. Once you run multiple locations, manage many SKUs and recipes, need real-time variance and theoretical-vs-actual food cost, or spend hours each week on manual counts, dedicated inventory software usually pays for itself in reduced waste and labor.