Food Cost % Calculator
Enter your beginning inventory, purchases, ending inventory, and food sales for a period — see your real food cost percentage, using cost of goods actually used, not just what you bought. Updates live, on the same shared formula engine as every other calculator here.
Period & Inventory
Pick a period (a week, a month) and enter your inventory and purchase numbers for it.
Want the full picture? Try the Ultimate Calculator — combines this with packaging, labor, fees, and overhead in one session.
How this is calculated ▸
beginning inventory + purchases − ending inventory — this is
what you actually used, not just what you bought. Food cost % =
cost of goods sold ÷ food sales × 100. Formula engine version .
Embed this calculator
Add it to your own site or blog — free, with attribution.
How to use the result
Food cost % is the headline number restaurants, food trucks, and caterers track most — the share of every dollar in food sales that went to the food itself, before labor, rent, or anything else. This calculator shows you your real number for the period you enter. It won't tell you whether that number is "good," because a healthy food cost % varies enormously by business type — a coffee shop and a steakhouse have completely different cost structures, and we don't publish a comparative range for a niche until it's actually sourced. See Methodology & Sources for which niches have sourced benchmarks so far. What this number is good for regardless of niche: tracking it period over period for your own business. A jump from 29% to 34% month over month is worth investigating even without an external benchmark to compare against. Add your labor cost % (from the Labor Cost Calculator) to this number and you get "prime cost" — the combined KPI most food businesses actually watch, since food and labor together are usually the largest controllable costs.
How this calculator works
The most common shortcut — and the most common mistake — is calculating food cost % as
purchases ÷ sales. That skips something important: food you bought but haven't used yet
(sitting in your walk-in or pantry) isn't a cost of this period, and food you used from inventory left
over from last period is. This calculator uses the accounting formula that accounts for that: cost of
goods sold equals beginning inventory, plus what you bought this period, minus what's left at the end.
That's the dollar value of food actually consumed in the period — the correct numerator for a food cost %
that reflects what really happened, not just what got purchased.
Worked example
The example loaded above is a real food truck's numbers for one week:
- Beginning inventory: $850
- Purchases this week: $2,400
- Ending inventory: $700
- Food sales this week: $8,200
Cost of goods sold is $850 + $2,400 − $700 = $2,550 — that's what was actually used, not the $2,400 that was purchased. Food cost % is $2,550 ÷ $8,200 × 100 = 31.1%. Gross profit is $8,200 − $2,550 = $5,650, or 68.9% of sales. Notice the gap: if this operator had used the purchases-only shortcut ($2,400 ÷ $8,200), they'd have calculated 29.3% — a full 1.8 points lower than the real number, simply because they drew down $150 more in inventory than they bought that week. Over a month, that kind of gap compounds into a genuinely misleading picture of where the business stands.
Common mistakes
- Skipping inventory entirely. Purchases-only food cost % is an approximation, and as the worked example shows, it can be meaningfully wrong in either direction depending on whether inventory grew or shrank during the period.
- Counting non-food purchases as food cost. Cleaning supplies, paper goods, and disposables belong in a different line item — mixing them in inflates food cost % and hides what's really happening with ingredients.
- Using sales figures that include tax or tips. Food sales should be the actual revenue for food sold, not the tax-inclusive total a customer paid — including tax overstates sales and understates food cost %.
- Mismatched period boundaries. Counting a purchase invoice dated one day after your period "ended," or sales from a day that fell outside your inventory count, throws off both sides of the formula.
- Comparing your number to a generic "ideal" percentage. A published range only means something if it's sourced for your specific type of business — see the Methodology & Sources page for what's actually documented so far, rather than assuming a percentage you saw elsewhere applies to you.