Ochrequiet invoicing

Free tool

See how fast your stock actually moves.

Enter your cost of goods sold and average inventory — or opening and closing figures — to get your turnover ratio and days inventory outstanding, with an optional comparison against a target.

Nothing you type here ever leaves your browser. There's no server behind this page — every figure is calculated locally, on your device, the same local-first idea behind the Ochre app.

Reviewed 2026-08-11

If you have a target (from your industry or your own history), enter it to see how you compare.

Results

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Questions

What is inventory turnover?
How many times a year your average inventory is sold and replaced — Cost of Goods Sold divided by average inventory. A higher ratio generally means stock isn't sitting idle; a very low ratio can mean overstocking, slow-moving products, or both.
What is Days Inventory Outstanding (DIO)?
The same relationship expressed in days rather than a ratio: on average, how many days a unit sits in stock before it sells. It's 365 divided by the turnover ratio — this calculator uses the common 365-day-year convention rather than your business's actual fiscal day count.
Should I use average inventory, or opening and closing figures?
Either — they give the same answer when your opening and closing figures average to the same number. Use opening/closing when that's what you have on hand (e.g. from a balance sheet); enter the average directly if you already track it, or if you have more than two data points and have averaged them yourself.
Is a higher turnover ratio always better?
Not automatically — a ratio far above your industry norm can mean you're understocked and risking lost sales, not just efficient. Turnover is most useful compared against your own history or your specific industry's typical range, which is why this tool lets you enter a target to compare against.
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What this page cannot do

A ratio typed once is not a trend.

Cost of goods sold and average inventory value are numbers you would have to look up and retype every time you wanted this ratio again. Ochre does not compute inventory turnover, but the numbers a real one needs — purchase price per product, and profit and loss by product — already live in Insights, drawn from invoices you actually issued rather than a figure you remembered.