Picture this: you're watching €30+ worth of perfectly good ingredients hit the trash bin every single day. Most restaurant owners never realize they're hemorrhaging money through unmeasured food waste. Tracking waste by category reveals exactly where your profits are disappearing.
Why weighing by category matters
Here's something most kitchen managers discover too late: not all waste hits your bottom line equally. A kilo of discarded bread costs you €3, while a kilo of beef costs €25. Weighing per category shows you where the real damage happens.
💡 Example:
Restaurant with €500,000 annual turnover throws away daily:
- Vegetables: 2 kg × €4/kg = €8
- Meat: 0.5 kg × €20/kg = €10
- Fish: 0.3 kg × €25/kg = €7.50
- Dairy: 1 kg × €6/kg = €6
Total per day: €31.50 = €11,500 per year
The 6 main categories for weighing
Break your waste into these categories:
- Vegetables & fruit: Everything that's perishable
- Meat & poultry: All animal proteins except fish
- Fish & seafood: Fresh and frozen fish
- Dairy: Milk, cheese, butter, cream
- Grains & bakery: Bread, pasta, rice
- Other: Sauces, spices, oil
Timing your weighing routine
Weigh at these 3 critical moments:
⚠️ Note:
Only weigh the edible part. Peels and bones that are normally discarded don't count as waste.
1. Morning (8:00-9:00): Check what spoiled overnight
2. Before service (16:00-17:00): Weigh what was discarded during prep
3. After service (23:00): Weigh leftovers that can't be kept
Calculating the real costs
For each category, calculate actual costs using your purchase prices:
💡 Example calculation:
Vegetable waste today: 1.8 kg
- Tomatoes: 0.5 kg × €4.20/kg = €2.10
- Lettuce: 0.8 kg × €3.50/kg = €2.80
- Peppers: 0.5 kg × €5.60/kg = €2.80
Total vegetables: €7.70
Always use your actual purchase prices, not selling prices. You're losing what you paid your supplier.
Digital tracking vs. paper logs
Many kitchens start with a simple notebook. This works initially, but spotting patterns becomes nearly impossible.
Digital tracking with tools like KitchenNmbrs makes it easier to:
- Spot weekly trends per category
- Automatically calculate costs using your purchase prices
- Generate reports for your team
Turning data into action
After weighing for a week, analyze what the patterns tell you:
Vegetables spiking? You're probably over-purchasing or storing incorrectly
Meat waste climbing? Check your portion sizes and cutting techniques
Fish numbers high? You might be over-optimistic about weekend sales
💡 Practical example:
Bistro discovered through weighing that 60% of their waste came from vegetables. Reason: salad portions as garnish were too large.
Solution: Reduced portion from 80g to 60g. Savings: €180 per month.
How do you weigh food waste by category?
Set up a scale and notepad
Place a digital kitchen scale by your waste bin. Put a sheet next to it with the 6 categories: vegetables, meat, fish, dairy, grains, other. Weigh in grams for accuracy.
Weigh 3 times daily at fixed times
Morning: spoiled products from refrigeration. Before service: cutting waste and prep scraps. After service: leftovers from plates and buffet. Note weight per category and reason for discarding.
Calculate costs with your purchase prices
Multiply the weight by your actual purchase price per kilo. Add up per category and calculate the total. This is your daily waste costs in euros.
✨ Pro tip
Focus your first 2 weeks on weighing only meat, fish, and dairy categories. These three typically represent 70% of your waste costs despite being lower volume than vegetables.
Calculate this yourself?
In the KitchenNmbrs app you can do this in just a few clicks. 7 days free, no credit card.
Was this article helpful?
Frequently asked questions
Should I also weigh peels and bones?
No, only the edible part that would normally be sold. Potato peels and meat bones are normal production waste, not actual waste.
How often do I need to do this to get a good picture?
At least one week, preferably two weeks. This way you'll see patterns and differences between busy and quiet days. After that, you can do a control week monthly.
What is a normal amount of waste per day?
Restaurants throw away an average of 1-3 kg of food per day per 100 covers. More than 4 kg per 100 covers indicates structural problems in purchasing or portioning.
Which category usually wastes the most?
By weight: vegetables and fruit (50-60% of total waste). By cost: often meat and fish, because these are much more expensive per kilo than vegetables.
Can I automate this with an app?
You always have to weigh manually, but the calculation and registration can be digital. Apps can automatically calculate costs when you enter the weight.
What if my waste varies dramatically day to day?
This usually indicates purchasing problems or inconsistent portion control. Track for 14 days minimum to identify which days spike and why. Weekend patterns often differ significantly from weekdays.
⚠️ EU Regulation 1169/2011 — Allergen Information — https://eur-lex.europa.eu/eli/reg/2011/1169/oj
The allergen information on this page is based on EU Regulation 1169/2011. Recipes and ingredients may vary by supplier. Always verify current allergen information with your supplier and communicate this correctly to your guests. KitchenNmbrs is not liable for allergic reactions.
In the UK, the FSA enforces allergen regulations under the Food Information Regulations 2014.
📚 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.
Make food waste measurable and manageable
Every kilo you throw away is lost margin. KitchenNmbrs connects your inventory to your recipes so you can see exactly where waste occurs — and how much it costs. Try it free.
Start free trial →