Yield percentage - calculator 2026

Quick answer

Most restaurant owners assume they know their true ingredient costs—but they're calculating them wrong. Yield percentage reveals how much usable product remains after processing, and ignoring it can inflate your actual costs by 50% or more.

Most restaurant owners assume they know their true ingredient costs—but they're calculating them wrong. Yield percentage reveals how much usable product remains after processing, and ignoring it can inflate your actual costs by 50% or more. That €18 per kilo salmon? You're really paying €33 for the fillet.

What is a yield percentage?

Yield percentage measures the usable portion remaining after you process raw ingredients. Remove the head and bones from whole fish, peel vegetables, or trim meat—what's left determines your real cost per serving. It's the kind of thing you only learn after closing your first month at a loss, wondering where all your projected profits went.

? Example:

You buy 2 kg whole salmon for €18.00 per kilo:

Purchase weight: 2.0 kg
After filleting: 1.1 kg fillet
Waste: 0.9 kg (head, bones, skin)

Yield: 1.1 kg / 2.0 kg × 100 = 55%

The yield percentage formula

The math looks simple, but getting it wrong destroys margins:

Yield percentage = (Usable weight / Purchase weight) × 100

But here's what matters more—your true cost per kilo:

Actual price per kg = Purchase price / (Yield% / 100)

⚠️ Watch out:

Don't multiply by yield percentage—that's backwards. Less usable product means higher cost per portion. Always divide by yield.

Yield percentages per product group

Different ingredients have vastly different yields. Use these ranges as starting points:

Whole fish: 45-60% (varies by species)
Whole chicken: 65-75%
Beef portions: 75-85%
Shell-on shrimp: 50-65%
Root vegetables: 80-90%
Onions: 88-92%

? Example calculation:

Whole salmon at €18.00/kg with 55% yield:

True fillet cost: €18.00 / 0.55 = €32.73/kg
200g portion costs: €6.55
If you used €18.00/kg: €3.60 (€2.95 error!)

Nearly €3 lost per plate when you ignore yield

Impact on your food cost

Wrong yield estimates wreck profitability faster than any other costing mistake. Think salmon costs €18 per kilo? You're actually paying €33, and your food cost percentage just doubled.

? Practical example:

Salmon dish priced at €28.00 (€25.69 excl. VAT):

200g fillet at €32.73/kg = €6.55
Additional ingredients: €2.50
Total ingredient cost: €9.05

Food cost: €9.05 / €25.69 × 100 = 35.2%

How do you measure yield in practice?

Weigh ingredients before and after processing—it's the only reliable method. Test each product multiple times to establish averages, since yields fluctuate seasonally. Winter salmon often yields differently than summer fish.

Food cost software can store yield percentages per ingredient and calculate true costs automatically. No more spreadsheet errors or manual recalculations every time you prep.

How do you calculate yield percentage? (step by step)

Weigh the raw product

Weigh your ingredient before you start processing it. With fish: weigh the whole fish. With vegetables: weigh including peels. Note this weight as your purchase weight.

Process and weigh the usable part

Process the product as you normally would (fillet, peel, debone). Weigh only what you actually use in the dish. This is your usable weight.

Calculate yield and actual price

Divide usable weight by purchase weight and multiply by 100 for the percentage. Divide your purchase price by this percentage (as decimal) for your actual price per kilo.

✨ Pro tip

Weigh and record yields for your 5 highest-cost proteins every 90 days. Seasonal changes in fish fat content and vegetable water levels can shift yields by 10-15%, throwing off your entire cost structure.

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

Do I need to measure yield for every single ingredient?

Focus on your top 8-10 most expensive ingredients that require processing. These drive the majority of your food costs. Standard items like flour or oil don't need yield calculations.

Does yield vary between different suppliers?

Absolutely, especially for proteins and fresh produce. Different cutting methods, fish sizes, and quality grades all affect yield. Always retest when switching suppliers.

How often should I remeasure yield percentages?

Seasonal ingredients need testing twice yearly minimum. Proteins and vegetables change with seasons, fishing methods, and farming cycles. Standard processed items can be checked annually.

What should I do if my yield is consistently lower than expected?

First, verify your prep techniques and train staff on proper processing. If yields remain low, either adjust menu prices upward or source from suppliers with better-quality products.

Should cooking shrinkage be included in yield calculations?

Calculate them separately for accuracy. Measure yield after processing but before cooking, then track cooking loss as an additional percentage. This gives you better control over both factors.

Can I use industry average yields instead of measuring myself?

Industry averages are useful starting points, but your specific suppliers, prep methods, and quality standards will create different results. Measure your own yields for accurate costing.

How do I handle ingredients with variable yields like whole fish?

Track yields over 10-15 fish to establish a realistic average, noting the range. Use the lower end for costing to protect margins, and adjust quarterly based on actual results.

ℹ️ This article was prepared based on official sources and professional expertise. While we strive for current and accurate information, the content may differ from the most recent regulations. Always consult the official authorities for binding standards.

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

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.

8 years kitchen manager at 1NUL8 Group Rotterdam

Expertise: food cost management HACCP kitchen management restaurant operations food safety compliance

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