Calculating the purchase price of flour per portion seems simple, but many bakers forget important cost components. This causes them to underestimate their cost price and earn less than they think. In this article you'll learn step-by-step how to calculate the actual flour costs per portion, including loss and waste.
Why exact calculation is crucial
As a bakery you work with large volumes. A difference of €0.02 per loaf sounds small, but at 1000 loaves per week you miss out on €1040 per year. Plus, flour prices fluctuate by season and world market - without exact calculation you don't know when to adjust your prices.
⚠️ Note:
Many bakers only calculate with the purchase price per kilo of flour. But you also have loss from dust, waste and spoilage. That can increase your actual costs by 8-12%.
Gather all flour-related costs
For a correct calculation you need more than just your supplier's invoice price:
- Purchase price per kilo flour (excluding VAT)
- Delivery costs (if not included)
- Storage loss (dust, spillage, waste)
- Quality spoilage (flour you can't use)
💡 Example:
Bakery using 200 kg flour per week:
- Purchase price: €0.85/kg
- Delivery costs: €25 per week (€0.125/kg)
- Loss from dust: 3% = €0.026/kg
Actual costs: €0.85 + €0.125 + €0.026 = €1.001/kg
Calculate loss and waste percentage
This is where many bakers go wrong. You buy 200 kilos, but how much do you actually use in your products?
Loss percentage formula:
Loss % = ((Purchased - Actually used) / Purchased) × 100
Measure this over 2-3 weeks to get an average. Common loss percentages for flour in bakeries:
- Small bakery (manual): 5-8%
- Medium bakery (semi-automatic): 3-5%
- Large bakery (fully automatic): 2-3%
Calculate actual price per kilo
Now that you know the loss percentage, calculate your actual costs:
Actual price per kilo = Total purchase costs / (1 - Loss%)
💡 Example calculation:
Situation: €1.001/kg purchase costs, 5% loss
- Yield: 100% - 5% = 95%
- Actual costs: €1.001 / 0.95 = €1.054/kg
Difference: €0.053/kg extra due to loss
Divide across your products per portion
Now you know your actual flour costs per kilo. For cost price calculation per product you need to know how many grams of flour each product contains:
- White bread: usually 400-500g flour per loaf
- Croissant: approximately 45-60g flour per piece
- Cake (base): 150-200g flour per 8 slices
Formula per portion:
Flour costs per portion = (Grams flour per portion / 1000) × Actual price per kilo
💡 Example per product:
Actual flour costs: €1.054/kg
- White bread (450g flour): €0.474 per loaf
- Croissant (50g flour): €0.053 per croissant
- Cake base (175g flour): €0.184 per cake
Update your calculations regularly
Flour prices change by season, harvest and world market. Check at least monthly:
- New purchase prices from supplier
- Changes in delivery costs
- Your loss percentage (measure again each quarter)
⚠️ Note:
Flour prices can rise 10-20% in a few weeks due to poor harvests. Without regular checks you fall behind and lose margin.
Digital tools
For bakeries making many different products, manually tracking all cost prices becomes difficult. A system like KitchenNmbrs can help to:
- Maintain all ingredient prices centrally
- Automatically calculate cost prices per product
- Pass price changes directly through to all recipes
- Record loss percentages per ingredient
How do you calculate flour costs per portion? (step by step)
Gather all flour-related costs
Note the purchase price per kilo of flour (excl. VAT), delivery costs per week, and any storage costs. Convert delivery costs to cost per kilo by dividing them by your weekly purchase amount.
Measure your loss percentage over 2-3 weeks
Weigh how much flour you purchase and how much you actually use in products. The difference is loss from dust, spillage and waste. Calculate the average percentage over several weeks.
Calculate actual costs per kilo
Divide your total purchase costs by (1 minus loss percentage). At €1.00/kg purchase costs and 5% loss this becomes €1.00 / 0.95 = €1.053/kg actual costs.
Convert to costs per portion
Multiply the number of grams of flour per product by your actual price per kilo, divided by 1000. A loaf with 450g flour then costs (450/1000) × €1.053 = €0.474 in flour.
✨ Pro tip
Weigh precisely one week each month how much flour you use versus purchase. This gives you current loss percentages and prevents your cost price slowly declining due to invisible waste.
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
Should I include VAT in my flour cost price?
No, always calculate with prices excluding VAT. The VAT you pay to your supplier can be offset against the VAT you receive from customers. For cost price calculation you only add the net purchase price.
How often should I measure my loss percentage again?
Measure again each quarter, or if your working method changes. With new equipment, different staff or a different supplier your loss percentage can be different. Once a year is too infrequent for accurate cost prices.
What if my supplier raises the flour price?
Update your calculations immediately and check if your selling prices still work. A rise of €0.10/kg flour means €0.045 extra costs per loaf for a loaf with 450g flour. At 1000 loaves per week that's €2340 per year.
Can I calculate different flour types together?
Better not to. Wheat flour, rye flour and specialty types have different prices and loss percentages. Track the actual costs per flour type for accurate cost price calculation per product.
What about flour I use for dusting?
Count this as loss. Flour for dusting work surfaces and molds is part of your production process, but doesn't go into the final product. Measure how much you use and add it to your loss percentage.
📚 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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