Free Small Business Pricing and Inventory Calculators
Practical math tools for shop owners, market stallholders, and solo sellers. Every calculator runs privately in your browser without sending numbers anywhere.
Pick a calculator below to check your item costs, set profitable prices, and avoid common math traps.
English (en)
Find your average cost across batches
This fits shop owners who buy the same item in several batches at different supplier prices.
Enter the quantity and unit price for each delivery into the Weighted Average Inventory Cost Calculator to find your true blended cost per unit. Knowing that single average cost makes it much easier to price your shelves accurately.
Set or check a selling price from cost
This fits sellers who know their unit cost and want to check their profit before putting a price tag on an item.
Use the Gross Margin vs Markup Calculator to see both numbers side by side so you do not mix them up when setting prices. For example, an item with a cost of 60 and a price of 100 gives you a gross profit of 40, which is a 40% margin and a 66.7% markup.
Keep stock in one list without software
This fits small shops that want a straightforward way to count and value stock on a computer without paying for a system.
Download the Free Excel Inventory Spreadsheet Template and type in your item names, quantities, and unit costs. It gives you a clean, single list you can update at your desk whenever new stock arrives.
Free web calculators and spreadsheets handle quick math at your desk, while mobile apps help when you need to update stock on the go.
A free spreadsheet is enough when you count stock occasionally at a computer, while the Inventory & Unit Cost Tracker iPhone app helps when you want to track stock in and out and monitor item costs right from your phone.