Food Cost Mathematics — The Numbers Every Chef Must Know

A restaurant does €18,000 in monthly revenue. The food is good. The location works. The team shows up. Yet every month, after expenses, there is nothing left. Sometimes less than nothing. The owner believes the food cost is "around 30%." When the actual number is calculated — every ingredient, every portion, every yield loss — it turns out to be 41%. That 11-point gap, on €18,000 revenue, is €1,980 per month. €23,760 per year. Flowing out of the business not because of theft, not because of laziness, not because of bad food — but because nobody did the math.

This is not a hypothetical. This is the default condition of any kitchen that prices by instinct and portions by feel. And it is fixable — completely, permanently — with arithmetic that a teenager could do, applied with a discipline that most kitchens never adopt.

Food cost is not something you discover at month-end. It is something you engineer before service begins. If you are not calculating it per dish, per portion, per gram — you are not managing a kitchen. You are hoping.

01 — The Formula

Simple Math, Radical Consequences

The formula is elementary:

If a lamb shoulder costs €5.52 in ingredients and sells for €22, the food cost is 25.1%. If the target is 30%, there is room. If the target is 25%, it is on the edge. Every chef should know this number for every dish on the menu — from memory, standing at the station.

But "cost of ingredients" is not what the supplier invoice says. It is what the ingredients actually cost after yield loss, waste, and the dozen invisible additions that most kitchens never track. Without that adjustment, the food cost percentage is a fantasy number built on fantasy inputs.

02 — Yield

The Gap Between the Invoice and the Plate

This is where restaurants lose money without seeing the wound.

A lamb shoulder is purchased at €12.00/kg. The recipe calls for 210g of usable lamb per portion. The naive calculation: 0.21 kg × €12 = €2.52. But 210g of purchased lamb is not 210g of plated lamb. After trimming sinew, removing bone, cutting excess fat, and accounting for cooking shrinkage, a whole lamb shoulder yields approximately 70% usable product. To get 210g on the plate, 300g of purchased product is needed.

The real cost is €3.60 per portion — not €2.52. A 43% difference, invisible to any kitchen that doesn't calculate yield, devastating when multiplied across every protein on every plate across every month.

Without yield: Lamb cost €2.52 · FC 11.5% · Looks incredible.
With yield: Lamb cost €3.60 · FC 16.4% · Realistic.
The gap: €1.08 per portion × 38 portions/week = €41/week = €2,132/year. On one ingredient. On one dish.

Now multiply across every ingredient on the menu. Whole fish yields 40–45% after filleting. Root vegetables yield 75–85% after peeling. Fresh herbs yield 60% after picking. Citrus yields 30–40% as juice. Every ingredient has a yield gap, and every gap is money that the kitchen believes it has but doesn't.

03 — The Yield Table

Reference Numbers Every Kitchen Needs

These are approximate yields. Every kitchen should test and verify their own — technique, supplier quality, and product size all affect the number. But these are the baselines to start from:

04 — The Invisible Line Items

What Nobody Tracks

Beyond yield, there are costs that most kitchens ignore because they seem too small to matter. They are not small. They are the difference between a 28% food cost and a 33% — which on €15,000/month revenue is €750/month, €9,000/year.

Cooking oil. A deep fryer holds 10–15 liters. At €3/liter, each fill costs €30–45. Changed every three days, that is €300–450/month. Rarely included in recipe costings.
Finishing butter. A tablespoon of butter to mount a sauce — 15g at €8/kg = €0.12 per plate. Across 50 plates a night: €6. Monthly: €180. Invisible. Real.
Seasoning. Salt, pepper, finishing oil. Estimate €0.15–0.25 per plate. Seems negligible. But €0.20 × 60 covers × 26 days = €312/month.
Bread and amuse-bouche. The complimentary bread basket, the pre-course bite. They have a cost. If it isn't included in the per-cover calculation, the food cost is understated from the first plate.
Staff meals. If the team eats from the kitchen — and they should — that food has a cost. Budget €3–5 per person per shift. For a team of six: €18–30/day, €468–780/month. A food cost that never appears on a plate but always appears on the P&L.

05 — The Spreadsheet

One File That Runs the Entire Business

A proper costing spreadsheet is the single most important financial tool in a restaurant — more important than the POS system. The POS tells you what sold. The spreadsheet tells you what it should have cost. The gap between those two numbers is where management lives.

The spreadsheet contains four interconnected layers: an ingredient master with every item's purchase price, yield, and cost per usable gram; a recipe tab where each dish pulls from the master to calculate total cost and food cost percentage; a menu overview that shows every dish's margin and engineering quadrant on a single page; and a supplier price tracker where a single cell update cascades through every recipe that uses that ingredient.

Building it takes a dedicated day — maybe two. It is the most productive sixteen hours a restaurant owner will ever spend. Because from that point forward, every financial question about the menu has an answer. Not an opinion. An answer.

06 — Where Kitchens Bleed

The Mistakes That Cost Thousands

Ignoring waste. Trim, peel, bones, overproduction, spoilage, plate returns — if it is not tracked, it is invisible. A waste log — a simple sheet at the waste bin where cooks record what they discard and why — reveals the pattern within one week. Within one month, waste drops 20–30%.
Estimating instead of weighing. "About 30 grams" is not a measurement. It is a hope. And hope consistently weighs more than 30 grams, because cooks are generous people who instinctively over-portion. A scale at every station is not a sign of distrust. It is a sign of professionalism. The best kitchens in the world weigh everything.
Forgetting the small costs. Oil, butter, seasoning, garnish herbs, the squeeze of lemon, the crumble of cheese — individually €0.10–0.40 per plate. Collectively, across a full menu, they add 2–4 percentage points to the food cost. The kitchen that doesn't track these is the kitchen that wonders why its "calculated" 28% is actually 32% on the P&L.
Stale prices in the spreadsheet. A costing sheet from January is fiction by March. Supplier prices shift with seasons, fuel costs, currency fluctuations. If the spreadsheet doesn't reflect current prices, the margin calculations are organized, formatted, and wrong.
Pricing by instinct. "€18 feels right for this dish." The price must be reverse-engineered from the cost: if food cost is €5.52 and the target FC% is 28%, the minimum price is €5.52 ÷ 0.28 = €19.71. Round to €20 or €21. "€18 feels right" is a €1.71-per-plate margin gift — at 38 plates per week, €65/week, €3,380/year. Given away because nobody ran the division.

Here is a challenge. Pick the three best-selling dishes on your menu. Tomorrow morning, before prep begins, weigh every ingredient that goes into one portion of each — not the recipe weight, but the actual weight that the cook puts on the plate. Calculate the real food cost using current supplier prices and actual yield percentages.

At least one of the three will surprise you. Either it costs more than expected — which means the kitchen is losing money it didn't know about — or it costs less, which means the price could be working harder. Either way: knowledge that didn't exist yesterday, applied to decisions that happen today. In this business, knowing beats hoping every single time.

If you want the full costing infrastructure — the spreadsheet, the yield tables, the recipe documentation, the menu engineering analysis — that is the work we do at AsketCuisine. Not theory. Applied arithmetic that protects a business from the inside out.

Restoran ostvaruje €18.000 mesečnog prometa. Hrana je dobra. Lokacija funkcioniše. Tim dolazi na posao. Pa ipak, svakog meseca, posle troškova, ne ostaje ništa. Ponekad manje od ništa. Vlasnik veruje da je trošak hrane „oko 30%." Kada se stvaran broj izračuna — svaka namirnica, svaka porcija, svaki gubitak na kalu — ispostavi se da je 41%. Tih 11 poena razlike, na €18.000 prometa, iznosi €1.980 mesečno. €23.760 godišnje. Curi iz biznisa ne zbog krađe, ne zbog lenjosti, ne zbog loše hrane — nego zato što niko nije uradio matematiku.

Ovo nije hipotetički scenario. Ovo je podrazumevano stanje svake kuhinje koja formira cene po instinktu i porcionira po osećaju. I potpuno je popravljivo — trajno, u potpunosti — aritmetikom koju bi tinejdžer mogao da uradi, primenjenom sa disciplinom koju većina kuhinja nikada ne usvoji.

Trošak hrane nije nešto što otkrivate na kraju meseca. To je nešto što projektujete pre nego što servis počne. Ako ne računate po jelu, po porciji, po gramu — ne upravljate kuhinjom. Nadate se.

01 — Formula

Jednostavna matematika, radikalne posledice

Formula je elementarna:

Ako jagnjeća plećka košta €5.52 u sastojcima a prodaje se za €22, trošak hrane je 25.1%. Ako je cilj 30%, ima prostora. Ako je cilj 25%, na ivici ste. Svaki šef kuhinje treba da zna ovaj broj za svako jelo na meniju — napamet, stojeći na stanici.

Ali „trošak sastojaka" nije ono što piše na fakturi dobavljača. To je ono što sastojci zaista koštaju posle gubitka na kalu, otpada i desetak nevidljivih dodataka koje većina kuhinja nikada ne prati. Bez te korekcije, procenat troška hrane je izmišljen broj izgrađen na izmišljenim ulazima.

02 — Kalo

Jaz između fakture i tanjira

Ovde restorani gube novac a da nikada ne vide ranu.

Jagnjeća plećka se kupuje po €12.00/kg. Recept traži 210g upotrebljivog jagnjeta po porciji. Naivan proračun: 0.21 kg × €12 = €2.52. Ali 210g kupljenog jagnjeta nije 210g jagnjeta na tanjiru. Posle obrade žila, uklanjanja kostiju, sečenja viška masnoće i gubitka na termičkoj obradi, cela jagnjeća plećka daje otprilike 70% upotrebljivog proizvoda. Da bi 210g završilo na tanjiru, potrebno je početi sa 300g kupovnog proizvoda.

Pravi trošak je €3.60 po porciji — ne €2.52. Razlika od 43%, nevidljiva svakoj kuhinji koja ne računa kalo, razarajuća kada se pomnoži na svaki protein na svakom tanjiru tokom svakog meseca.

Bez kala: Trošak jagnjeta €2.52 · FC 11.5% · Izgleda neverovatno.
Sa kalom: Trošak jagnjeta €3.60 · FC 16.4% · Realistično.
Razlika: €1.08 po porciji × 38 porcija nedeljno = €41/nedeljno = €2.132/godišnje. Na jednom sastojku. Na jednom jelu.

Sada pomnožite to na svaku namirnicu na meniju. Cela riba daje 40–45% posle filetiranja. Korenasto povrće 75–85% posle ljuštenja. Sveže začinsko bilje 60% posle branja. Citrus 30–40% kao sok. Svaka namirnica ima razliku kala, i svaka razlika je novac za koji kuhinja veruje da ga ima ali nema.

03 — Tabela kala

Referentni brojevi koje svaka kuhinja mora da ima

Ovo su približni kaloi. Svaka kuhinja treba da testira i verifikuje svoje — tehnika, kvalitet dobavljača i veličina proizvoda utiču na krajnji broj. Ali ovo su bazne vrednosti za polazište:

04 — Nevidljive stavke

Ono što niko ne prati

Izvan kala, postoje troškovi koje većina kuhinja ignoriše jer deluju premali da bi bili bitni. Nisu mali. Oni su razlika između 28% troška hrane i 33% — što na €15.000 mesečnog prihoda znači €750/mesečno, €9.000/godišnje.

Ulje za kuvanje. Friteza drži 10–15 litara. Po €3/litar, svako punjenje košta €30–45. Menjano svaka tri dana, to je €300–450/mesečno. Retko uključeno u kalkulacije recepata.
Puter za završnicu. Kašika putera za montiranje sosa — 15g po €8/kg = €0.12 po tanjiru. Na 50 tanjira noću: €6. Mesečno: €180. Nevidljivo. Realno.
Začinjavanje. So, biber, ulje za završnicu. Procena €0.15–0.25 po tanjiru. Deluje zanemarljivo. Ali €0.20 × 60 pokrivenih × 26 dana = €312/mesečno.
Hleb i amuse-bouche. Besplatna korpa hleba, zalogajčić pre jela. Imaju trošak. Ako nije uključen u kalkulaciju po pokrivenoj, trošak hrane je potcenjen od prvog tanjira.
Obroci osoblja. Ako tim jede iz kuhinje — a treba — ta hrana ima trošak. Računajte €3–5 po osobi po smeni. Za tim od šestoro: €18–30 dnevno, €468–780/mesečno. Trošak hrane koji se nikada ne pojavljuje na tanjiru ali se uvek pojavljuje na bilansu.

05 — Tabela

Jedan fajl koji vodi ceo biznis

Profesionalna kalkulaciona tabela je najvažniji finansijski alat u restoranu — važniji od POS sistema. POS govori šta se prodalo. Tabela govori koliko je to trebalo da košta. Praznina između ta dva broja je gde upravljanje živi.

Tabela sadrži četiri međusobno povezana sloja: master namirnica sa kupovnom cenom, kalom i troškom po upotrebljivom gramu svake stavke; tab recepata gde svako jelo povlači iz mastera da izračuna ukupan trošak i procenat troška hrane; pregled menija koji pokazuje maržu i inženjerski kvadrant svakog jela na jednoj stranici; i praćenje cena dobavljača gde ažuriranje jedne ćelije kaskadno prolazi kroz svaki recept koji koristi tu namirnicu.

Izrada traje jedan posvećen dan — možda dva. To su najproduktivnijih šesnaest sati koje će vlasnik restorana ikada provesti. Jer od tog trenutka nadalje, svako finansijsko pitanje o meniju ima odgovor. Ne mišljenje. Odgovor.

06 — Gde kuhinje krvare

Greške koje koštaju hiljade

Ignorisanje otpada. Obrezak, ljuštenje, kosti, prekomerna proizvodnja, kvarenje, vraćeni tanjiri — ako se ne prati, nevidljivo je. Dnevnik otpada — jednostavan list kod kante gde kuvari beleže šta bacaju i zašto — otkriva obrazac za jednu nedelju. Za mesec dana, otpad pada 20–30%.
Procenjivanje umesto merenja. „Otprilike 30 grama" nije merenje. To je nada. A nada konstantno teži više od 30 grama, jer su kuvari velikodušni ljudi koji instinktivno stavljaju više. Vaga na svakoj stanici nije znak nepoverenja. To je znak profesionalizma. Najbolje kuhinje na svetu mere sve.
Zaboravljanje sitnih troškova. Ulje, puter, začini, garnitura, ceđeni limun, mrvice sira — pojedinačno €0.10–0.40 po tanjiru. Kolektivno, dodaju 2–4 procentna poena na trošak hrane. Kuhinja koja ovo ne prati je kuhinja koja se pita zašto joj je „izračunatih" 28% zapravo 32% na bilansu.
Zastarele cene u tabeli. Kalkulacioni list iz januara je fikcija do marta. Cene dobavljača se menjaju sa sezonama, troškovima goriva, fluktuacijama valute. Ako tabela ne odražava aktuelne cene, proračuni marži su organizovani, formatirani — i pogrešni.
Formiranje cena po instinktu. „€18 mi deluje ok za ovo jelo." Cena mora biti obrnuto izračunata iz troška: ako je trošak hrane €5.52 a ciljani FC% je 28%, minimalna cena je €5.52 ÷ 0.28 = €19.71. Zaokružite na €20 ili €21. „€18 mi deluje ok" je poklon marže gostima od €1.71 po tanjiru — na 38 tanjira nedeljno, €65/nedeljno, €3.380/godišnje. Poklonjeno jer niko nije uradio jedno deljenje.

Evo izazova. Izaberite tri najprodavanija jela na meniju. Sutra ujutru, pre prepa, izmerite svaku namirnicu koja ulazi u jednu porciju svakog od njih — ne težinu iz recepta, nego stvarnu težinu koju kuvar stavlja na tanjir. Izračunajte pravi trošak hrane koristeći aktuelne cene dobavljača i stvarne procente kala.

Barem jedno od tri će vas iznenaditi. Ili košta više nego što se mislilo — što znači da kuhinja gubi novac za koji nije znala — ili košta manje, što znači da cena može bolje da radi. U oba slučaja: znanje koje juče nije postojalo, primenjeno na odluke koje se donose danas. U ovom biznisu, znanje pobeđuje nadu svaki put.

Ako vam treba kompletna infrastruktura kalkulacije — tabela, kaloi, dokumentacija recepata, analiza menu inženjeringa — to je posao koji radimo u AsketCuisine. Ne teorija. Primenjena aritmetika koja štiti biznis iznutra.