Every extra gram on a plate costs you money throughout the year. Most restaurants calculate food costs with theoretical portion sizes, but actual servings often exceed these standards. You can close this gap with systematic measurement and clear kitchen protocols.
Why theoretical and actual portion costs differ
Your chef serves 180 grams of steak while you calculate with 150 grams. You lose €2.40 per portion. At 40 portions per week, this costs you €4,992 per year on just one dish.
The main causes:
- No clear portion agreements with your team
- No scale in the kitchen during service
- Chef wants to "make guests happy" with extra large portions
- Stress during busy moments leads to inaccuracy
💡 Example:
Steak on the menu: €32.00. You calculate with 150g meat at €24/kg.
- Theoretical meat costs: 0.15 kg × €24 = €3.60
- Actually served: 180g = €4.32
- Difference per portion: €0.72
At 40 portions/week: €0.72 × 40 × 52 = €1,497 per year extra
Measure what actually happens first
Before you can fix anything, you need to know how big the problem really is. Take a full week to measure what actually goes on the plates.
Choose your 5 top-selling dishes and weigh all main ingredients for seven consecutive days:
- Meat, fish and other expensive proteins
- Side dishes like rice, pasta, potatoes
- Sauces (especially cream sauces and dressings)
- Garnishes and decorations
⚠️ Note:
Don't measure only during quiet moments. Portions often go wrong precisely during peak times.
Set clear portion standards
Create a portion card for each dish with exact weights. Hang it somewhere everyone can see while cooking.
A solid portion card contains:
- Main ingredient: exact weight in grams
- Side dishes: weight or volume (spoons, cups)
- Sauces: milliliters or number of spoons
- Garnish: number of pieces or weight
💡 Example portion card:
Steak with fries:
- Steak: 150g (raw weight)
- Fries: 200g (before frying)
- Pepper sauce: 60ml (4 tablespoons)
- Vegetables: 80g mixed
- Butter on plate: 5g
Print this out and hang it above the stove.
Get the right tools
Your team can only portion accurately if they have the right equipment. Invest in practical weighing and portioning aids.
Essential tools:
- Digital kitchen scale (up to 2kg, accurate to 1g)
- Portion spoons in different sizes
- Measuring cups for sauces and dressings
- Ice cream scoops for side dishes like rice
Place these tools in strategic spots throughout the kitchen, not hidden in a drawer.
Train your team and make agreements
The most detailed standards won't help if your team doesn't use them. After managing kitchen operations for nearly a decade, I've learned that explaining why accurate portioning matters for your business's profitability makes all the difference.
💡 Example explanation for team:
"If we give 20 grams extra meat per steak, we lose €1,500 per year. That's money we could use for better ingredients or your salary."
Make clear agreements:
- Always weigh main ingredients, even during busy times
- Ask for confirmation instead of guessing
- Check each other on portion size
- Discuss deviations without blame
Check and adjust weekly
Portioning isn't a one-time action. Schedule a short moment each week to verify whether the agreements are still being followed.
Weekly check (15 minutes):
- Randomly weigh 3-5 portions of different dishes
- Compare with your standards
- Discuss deviations immediately with your team
- Update standards if you adjust recipes
⚠️ Note:
Don't check to catch people out, but to improve the system. Focus on solutions, not blame.
Use digital support
Manual checking works well, but digital tools make it easier to track what portions actually cost.
With tools like KitchenNmbrs you can:
- Record exact portion weights per recipe
- Automatically calculate what each portion costs
- Quickly see the effect of different portion sizes
- Give your team access to the correct portions via their phone
This prevents portion information from getting lost or outdated.
How do you reduce the difference? (step by step)
Measure actual portions for a week
Weigh all main ingredients of your 5 best-selling dishes throughout a full week. Record both quiet and busy moments. This gives you the real numbers to work with.
Set clear portion standards
Create a portion card for each dish with exact weights and volumes. Hang it in visible places in the kitchen and make sure everyone knows where they are.
Get the right tools
Invest in digital scales, portion spoons and measuring cups. Place them in strategic spots so your team can easily use them during service.
Train your team and explain why
Explain how extra portions affect profit. Make clear agreements about when and how to weigh, and create a culture where accuracy is valued.
Check weekly and adjust
Schedule 15 minutes each week to check random portions. Discuss deviations constructively and update your standards if recipes change.
✨ Pro tip
Track your three highest-volume dishes for exactly 14 days during different service periods. You'll identify 70% of your portion cost leakage without overwhelming your kitchen staff with excessive monitoring.
Calculate this yourself?
In the KitchenNmbrs app you can do this in just a few clicks. 7 days free, no credit card.
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Frequently asked questions
How often should I check portions?
Start by measuring daily for a week to map out the current situation. After that, checking 3-5 random portions weekly is enough to spot deviations.
What if my chef finds weighing annoying?
Explain that it's not about control, but about your business's profitability. Show them how much money you're losing with inaccurate portions. Most chefs understand this once you show them the numbers.
Do I need to weigh everything or just the expensive ingredients?
Focus first on the most expensive ingredients: meat, fish, premium vegetables and sauces. Once you have those under control, you can expand to other components. 80% of your problem often lies in 20% of your ingredients.
What's an acceptable difference between theory and practice?
Aim for a maximum of 5-10% deviation from your standard portions. Larger deviations cost too much money. With expensive ingredients like meat, even 5% quickly becomes noticeable in your margin.
How do I prevent standards from becoming outdated?
Schedule 30 minutes monthly to review your portion cards. If you adjust recipes, immediately update the portion standards too. Preferably use a digital system that you can easily update.
Should I adjust my menu prices if I can't control portions?
Only as a last resort. It's better to fix the portioning issue first since oversized portions also affect food waste and kitchen efficiency. Price increases should reflect value, not poor portion control.
📚 Sources consulted
- EU Verordening 852/2004 — Levensmiddelenhygiëne (2004) — Official source
- EU Verordening 853/2004 — Hygiënevoorschriften voor levensmiddelen van dierlijke oorsprong (2004) — Official source
- EU Verordening 1169/2011 — Voedselinformatie aan consumenten (2011) — Official source
- NVWA — Hygiënecode voor de horeca (2024) — Official source
- NVWA — Allergenen in voedsel (2024) — Official source
- Codex Alimentarius — International Food Standards (2024) — Official source
- FSA — Safer food, better business (HACCP) (2024) — Official source
- BVL — Lebensmittelhygiene (HACCP) (2024) — Official source
- Warenwetbesluit Bereiding en behandeling van levensmiddelen (2024) — Official source
- WHO — Foodborne diseases estimates (2024) — Official source
Food Standards Agency (FSA) — https://www.food.gov.uk
The HACCP standards shown in this application are for informational purposes only. KitchenNmbrs does not guarantee that displayed values are current or complete. Always consult the FSA or your local authority for the latest regulations.
Written by
Jeffrey Smit
Founder & CEO of KitchenNmbrs
Jeffrey Smit built KitchenNmbrs from 8 years of hands-on experience as kitchen manager at 1NUL8 Group in Rotterdam. His mission: give every restaurant owner control over food cost.
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