📝 Purchasing, suppliers & strategy · ⏱️ 3 min read

How do I calculate the purchase price of flour per...

📝 KitchenNmbrs — · updated 07 Apr 2026

Quick answer
Accurate flour cost calculations can boost your bakery's profit margins by 15-20% within three months. Most bakers underestimate their true flour expenses by overlooking waste, dust loss, and storage costs.

Accurate flour cost calculations can boost your bakery's profit margins by 15-20% within three months. Most bakers underestimate their true flour expenses by overlooking waste, dust loss, and storage costs. Here's how to calculate your real flour costs per portion.

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. I've seen this mistake cost the average bakery EUR 200-400 per month - they'll order based on recipes but never track what disappears through spillage and cleaning waste.

  • 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. Systems can help you:

  • Maintain all ingredient prices centrally
  • Automatically calculate cost prices per product
  • Pass price changes directly through to all recipes
  • Record loss percentages per ingredient

Related articles

How do you calculate flour costs per portion? (step by step)

1

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.

2

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.

3

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.

4

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

Track your flour usage for exactly 4 weeks each quarter - weigh what goes in versus what actually ends up in products. This reveals your true loss percentage and prevents cost creep from invisible waste that can add up to €300 monthly.

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.
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

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.

JS

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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