Most restaurant owners think they're tracking waste properly, but they're missing the bigger picture. Kitchen waste hits 10-15% of purchases, yet many operators lump everything together instead of measuring by product category. You can't fix what you can't see clearly.
Why measure waste per category?
Different products waste at different rates. Vegetables spoil faster than dried pasta. Fish costs more than bread. Measuring by category shows you exactly where money disappears.
💡 Example:
Restaurant with €2,000 weekly purchases:
- Fish: €400 purchases, €60 waste = 15%
- Vegetables: €300 purchases, €45 waste = 15%
- Meat: €500 purchases, €25 waste = 5%
- Dry goods: €200 purchases, €5 waste = 2.5%
Attack fish and vegetables first - that's where your profits leak.
The 5 main categories for waste measurement
Break your purchases into these groups for maximum clarity:
- Fresh products (vegetables, fruit, fish) - expire quickly
- Meat and poultry - expensive but longer shelf life
- Dairy - limited shelf life, often minimal waste
- Dry goods (pasta, rice, spices) - long shelf life, little waste
- Frozen - very little waste from spoilage
Calculate the waste percentage
Each category uses the same formula:
Waste % = (Amount thrown away / Total category purchases) × 100
💡 Example calculation:
Vegetables this week:
- Purchased: €350
- Thrown away: €42 (lettuce, tomatoes, peppers past date)
Waste: (€42 / €350) × 100 = 12%
That's normal for vegetables in winter.
Normal waste percentages per category
Use these benchmarks to gauge your performance:
- Fresh vegetables/fruit: 10-20% (depending on season)
- Fish: 8-15% (due to short shelf life)
- Meat/poultry: 3-8% (longer shelf life, more expensive so handled more carefully)
- Dairy: 2-5% (small quantities, easy to track)
- Dry goods: 1-3% (mainly from packaging damage)
⚠️ Note:
Only count real waste - not trim loss or normal preparation. A fish bone isn't waste, a spoiled fish is.
What do you do with the numbers?
Once you identify problem areas, you can act. This is the kind of thing you only learn after closing your first month at a loss - but the numbers don't lie:
- Above 20% on fresh products: Buy less, order more frequently
- High meat waste: Check your FIFO system (first in, first out)
- High waste on one product: Maybe portions are too large?
💡 Example action:
A pizzeria saw 25% waste on mozzarella. Cause: they bought 5kg blocks but only used 2kg per week. Solution: order smaller packages. Waste dropped to 8%.
Digital tracking vs. paper
You can track waste on paper, but digital offers advantages:
- Automatic calculation of percentages
- Trends visible over weeks/months
- Easy comparison between categories
Food cost calculators can help you track waste per category and automatically calculate percentages, without doing the math yourself.
How do you calculate waste per category? (step by step)
Divide your purchases into 5 categories
Make lists of: fresh products (vegetables/fruit/fish), meat/poultry, dairy, dry goods, and frozen. Note per category how much you purchased this week in euros.
Weigh and value all waste
Every time you throw something away, note the product and estimate its value. A head of lettuce worth €2, 200 grams of spoiled fish worth €8, etc. Do this for a full week.
Calculate the percentage per category
Add up all waste per category and divide by the total purchases of that category. Multiply by 100 to get the percentage. Compare with the normal percentages from this article.
✨ Pro tip
Track every waste item by category for exactly 3 weeks straight. After that, only log items worth €5 or more - you'll capture 85% of your waste data with half the effort.
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
Does trim loss count as waste?
No, trim loss is normal during preparation. Fish skin, bones, and vegetable peels aren't waste. Only count products that expire or get damaged.
How often should I measure waste?
Measure intensively for at least one week per month. After that you can just note the big items. This keeps you informed without eating up too much time.
What if my waste percentage is much higher than normal?
First check your ordering frequency - maybe you're ordering too much at once. Then examine your FIFO system and portion sizes. Often it's one of these three factors causing the problem.
Can I prevent waste by freezing everything?
Partly yes, but not everything can be frozen without quality loss. Lettuce and tomatoes can't handle freezing. Focus first on smarter planning and smaller purchase quantities.
📚 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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