Think of weighing ingredients like tuning a guitar - a small time investment that prevents everything from sounding off. Many kitchens skip weighing because it seems to slow down work, but they lose hundreds of euros per month on oversized portions. Calculate exactly how much time weighing costs versus how much money it saves.
Why this calculation matters
Every kitchen faces the same dilemma: save time by portioning by feel, or invest time in weighing for consistent portions. The numbers tell the real story. An extra minute of weighing can save you €50-200 per week on ingredients.
💡 Example:
Restaurant with 100 covers per day, 6 days per week:
- Steak by feel: 220 grams average
- Steak weighed: 200 grams standard
- Difference: 20 grams × €45/kg = €0.90 per portion
- Per week: 600 portions × €0.90 = €540 savings
Weekly savings: €540
Calculate the time investment of weighing
First measure how much extra time weighing costs per dish. Do this realistically during normal service, not during quiet moments.
- Meat/fish: 15-30 seconds extra per portion
- Vegetables as side dish: 10-20 seconds extra
- Sauces: 5-10 seconds extra
- Pre-portioning: Can be faster during service
💡 Example time cost calculation:
100 covers per evening, 20 seconds extra per plate:
- Extra time: 100 × 20 sec = 2,000 seconds = 33 minutes
- Kitchen staff: €15/hour
- Cost of extra time: 33 min × €0.25/min = €8.25
Daily time costs: €8.25
Calculate cost savings from weighing
The savings come from consistent portions. Without a scale, your team gives an average of 10-25% more than needed.
Formula for cost savings per week:
Savings = (Difference in grams × Purchase price per gram × Number of portions per week)
💡 Example different ingredients:
600 portions per week, 15% less through weighing:
- Steak: 30g × €0.045/g × 150 portions = €202.50
- Salmon: 25g × €0.032/g × 200 portions = €160.00
- Cheese: 10g × €0.018/g × 300 portions = €54.00
Total weekly savings: €416.50
ROI calculation: time versus savings
Now you can calculate the return on investment. Usually weighing pays for itself within 1-3 days.
- Daily time costs: Extra hours × Kitchen staff hourly wage
- Daily savings: Weekly savings ÷ 6 working days
- Net advantage per day: Savings - Time costs
⚠️ Note:
Only calculate with your most expensive ingredients. Weighing cheap side dishes doesn't pay off much, but it does cost time. Focus on meat, fish and cheese.
From years of working in professional kitchens
Weighing isn't always the smartest investment of your time. It depends on your type of kitchen and ingredients.
- With cheap ingredients: Vegetables under €3/kg don't need to be weighed
- With experienced team: Good cooks portion consistently by feel
- With pre-portioned purchasing: If you already buy exactly per portion
- With fast concepts: Fast food where speed matters more
💡 Alternative: pre-portioning
Instead of weighing during service:
- Portion meat/fish during prep
- Vacuum per portion or store in containers
- During service only reheat/grill
- Saves time and ingredients
Practical tips for efficient weighing
With the right approach, weighing costs minimal extra time and delivers maximum savings.
- Digital scale: Faster than analog dials
- Tare function: Plate on scale, zero out, add ingredient
- Multiple scales: One for meat, one for side dishes
- Fixed locations: Scale always in the same place in kitchen
- Train your team: Everyone needs to know why you weigh
How do you calculate the ROI of weighing? (step by step)
Measure current portion size without weighing
Weigh 20-30 portions that your team makes by feel from your most expensive dishes. Calculate the average. This is your baseline for calculating savings.
Calculate the time costs of weighing
Measure how much extra time weighing costs per portion during a normal service. Multiply by number of portions per day and the hourly wage of your kitchen staff.
Calculate cost savings per week
Use the formula: (Difference in grams × Purchase price per gram × Number of portions per week). Focus on your 3-5 most expensive ingredients for the biggest impact.
Compare time costs with savings
Subtract daily time costs from daily savings. If the result is positive, weighing pays off. Usually you see €30-150 net advantage per day.
✨ Pro tip
Track your weighing time for exactly 3 shifts during busy periods - most kitchens discover they're only spending an extra 45 minutes per week but saving €300+ monthly. The math always surprises skeptical cooks.
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
How much extra time does weighing cost per portion?
For meat and fish: 15-30 seconds extra. For side dishes: 10-20 seconds. With a good scale and routine this gets faster.
Which ingredients make weighing most worthwhile?
With expensive ingredients above €15/kg: meat, fish, cheese, nuts. With vegetables under €3/kg the savings are too small to justify the extra time.
Can I pre-portion instead of weighing during service?
Yes, that's often more efficient. Portion meat and fish during prep, store per portion. During service you only need to reheat.
How much do I save on average by weighing?
Most kitchens save 10-25% on ingredient costs of expensive products. With €500 meat/fish per week this means €50-125 savings.
What if my team doesn't weigh consistently?
Train why it's important and show the numbers. €400 per week savings usually motivates. Make it easy with good scales in fixed locations.
Should I weigh every ingredient or just the expensive ones?
Focus only on ingredients above €10/kg - meat, fish, premium cheeses. Weighing pasta or potatoes wastes more time than it saves money.
⚠️ 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.
Standardize portions, stabilize margins
Varying portions mean varying costs. KitchenNmbrs records exact quantities per recipe so every plate costs the same. Try it free for 14 days.
Start free trial →