Food Cost Calculator
Calculate food cost percentage and profit margin for menu items.
PhD Sports Science, Registered Nutritionist (RNutr)
Sports scientist and registered nutritionist specialising in metabolic health, athletic performance and dietary analysis.
Related calculators
About the Food Cost Calculator
Food cost percentage is the foundational metric of restaurant financial management — the ratio of what you spend on ingredients to what you charge for the finished dish. Industry benchmarks vary by segment: fine dining typically runs 28–35% food cost (high-quality ingredients, premium pricing), casual dining targets 28–32%, and fast food achieves 25–30% through volume purchasing and standardised portions. Street food and food vans, with lower overheads but higher food costs on some items, often run 35–40%. Getting food cost wrong by even 3–4 percentage points can mean the difference between profit and loss.
The calculation appears simple — ingredient cost divided by menu price — but professional kitchens track several variants. Theoretical food cost uses the exact recipe cost based on purchase prices and perfect portioning. Actual food cost accounts for waste, theft, spoilage, staff meals, and over-portioning, and is typically 3–7% higher than theoretical. The gap between theoretical and actual food cost is a key management metric: a large gap indicates operational problems (over-portioning, high waste, inventory theft, or recipe non-compliance).
Beyond food cost percentage, restaurant operators track contribution margin (menu price minus food cost in absolute pounds), which determines what each dish actually contributes to covering labour and overhead. A dish with 20% food cost but £3 contribution margin is less valuable than a dish with 35% food cost but £9 contribution margin. This is why menu engineering — popularised by Kasavana and Smith in 1982 — categorises menu items as Stars (high margin, high popularity), Plowhorses (high popularity, low margin), Puzzles (high margin, low popularity), and Dogs (low margin, low popularity), each requiring different pricing strategies.
How it works
Food Cost % = (Ingredient Cost ÷ Menu Price) × 100 Ideal Menu Price = Ingredient Cost ÷ (Target Food Cost % ÷ 100) Gross Profit Margin = ((Menu Price − Ingredient Cost) ÷ Menu Price) × 100
Worked example
Example: A restaurant burger with a fully-costed recipe (including bun, patty, toppings, garnish, packaging).
Ingredient cost: £3.20 (150g beef patty £1.80, brioche bun £0.40, toppings/sauce £0.60, fries portion £0.40).
Menu price: £13.50.
Food cost % = (£3.20 ÷ £13.50) × 100 = 23.7%.
Gross profit = £13.50 − £3.20 = £10.30 per cover.
GP margin = (£10.30 ÷ £13.50) × 100 = 76.3%.
At target food cost of 30%: ideal price = £3.20 ÷ 0.30 = £10.67 — but the actual £13.50 gives better margin, justified by market positioning.
If actual food cost runs at 28% (rather than theoretical 23.7%), the gap of 4.3% on 500 covers/week = 500 × £13.50 × 4.3% = £290 lost weekly to waste/over-portioning.
Tips to improve your result
- 1.
Cost every recipe, including portion sizes of garnishes, cooking oils, and sauce smears. Chefs notoriously underestimate "free" ingredients; a daily garnish parsley habit across 80 covers can cost £500 per year.
- 2.
Update recipes costs quarterly or when commodity prices change significantly. Beef, dairy, and fresh produce are particularly volatile — a 20% increase in beef wholesale price can push a 30% food cost dish to 36% without any menu changes.
- 3.
Plate waste is a hidden cost. Track it by weighing food returned from tables for a week. If dishes are consistently returned with uneaten food, portion sizes may be too large — a win-win opportunity to reduce cost and improve food quality (fresher service).
- 4.
Beverage cost percentage works differently from food. Alcohol typically runs 20–25% cost (75–80% gross margin), with wine 30–45% and cocktails often under 15% when spirits are bought in volume. Soft drinks carry margins of 85%+, making them the most profitable category per sale.
- 5.
Set up a weekly "usage report" comparing theoretical usage (expected based on sales mix) against actual stock depletion. A consistent gap of >5% on high-value items (steak, shellfish, premium spirits) suggests portioning error or theft — either requires action.