What counts as a good inventory turnover ratio?

It depends entirely on what you sell. Grocery and food businesses may turn over dozens of times a year while jewellery or heavy equipment dealers may turn over once or twice. The only universally useful comparison is against your own past periods and against direct competitors in the same segment.

Should I use cost of goods sold or revenue?

Cost of goods sold. Inventory sits on the balance sheet at cost, so using revenue compares two different bases and produces a ratio inflated by your margin. If you only have revenue to hand, subtract your gross profit first.

How do I calculate average inventory properly?

Beginning inventory plus ending inventory divided by two is the standard approach and is what most benchmarks assume. If your business is seasonal, averaging twelve month-end balances instead gives a far more honest picture than two points can.

Why does the tool use 365 days?

It converts the ratio into days by dividing 365 by the turnover figure, which is the conventional definition of days inventory outstanding. Some analysts use 360 days instead, which produces a slightly lower day count on the same inputs.

Can I break this down by product line?

Not in this tool. It takes one pair of totals and returns one ratio. Run it separately per category using that category cost of goods sold and inventory, which is usually where the real insight is, since a blended ratio hides both the fast and the dead stock.

Does a very high ratio mean I am doing well?

Not necessarily. Extremely high turnover can mean you are understocked and losing sales to empty shelves, or that you are discounting hard to move goods. Read it alongside stockout frequency and gross margin rather than on its own.

Inventory Turnover Calculator: Ratio and Days on Hand

Inventory Turnover Calculator: Ratio and Days on HandThe Inventory Turnover Calculator is a free browser-based tool that divides your cost of goods sold by your average inventory value to show how many times a year you sell through and replace your stock, then converts that into days inventory outstanding. Two inputs produce two numbers: the turnover ratio, expressed as a multiple, and the average number of days a unit sits before it sells. It uses a 365-day year. It does not read your accounting system, does not break results down by product line, and cannot tell you what a good ratio is for your industry, because that varies enormously between a bakery and a jeweller.

What people use it for

Spotting cash trapped in slow stock

A hardware retailer suspects too much money is tied up on the shelves. Cost of goods sold of $500,000 against $100,000 of average inventory gives 5x turnover and 73 days on hand. Cutting that to 60 days would free roughly a fifth of the inventory investment for other uses, which makes the case concrete rather than intuitive.

Comparing this year against last year

A shop owner runs the calculation for two consecutive years using each year figures. A falling ratio with flat sales means inventory is growing faster than demand, which usually shows up as a cash squeeze months before it shows up in the profit and loss statement.

Setting a reorder policy for perishable goods

A bakery with $260,000 of cost of goods sold and $16,000 of average inventory turns over 16.25 times a year, about 22 days on hand. For products with a shelf life measured in days, that number is a direct signal that ordering patterns need to be weekly rather than monthly.

Answering a lender question during a credit review

Working capital lines are often sized against inventory. A borrower asked how quickly stock converts to cash can produce the ratio and days figure in under a minute, along with the two inputs behind them, which is a better answer than a general assurance that stock moves quickly.

How it works

Find your cost of goods sold Take the figure for a full year from your profit and loss statement. Use cost of goods sold rather than revenue, because inventory is carried at cost and mixing the two inflates the ratio.
Work out average inventory The usual approach is beginning inventory plus ending inventory divided by two. The tool does not calculate this for you, so do the averaging first and enter the single result.
Enter both figures Type cost of goods sold and average inventory into the two fields. Both must be greater than zero or the calculation will not run, since dividing by an empty inventory has no meaning.
Press Calculate Turnover The tool echoes your two inputs, then shows the turnover ratio as a multiple and days inventory outstanding rounded to whole days underneath.
Interpret against your own history A single ratio in isolation says very little. Compare it against your own prior periods and against published benchmarks for your specific retail or manufacturing segment before drawing conclusions.

Worked examples

Input: Cost of goods sold $500,000, average inventory $100,000.

Result: Turnover ratio 5.00x and 73 days inventory outstanding. Stock is sold and replaced five times a year, sitting about two and a half months on average.

Input: Cost of goods sold $1,200,000, average inventory $150,000.

Result: Turnover ratio 8.00x and 46 days inventory outstanding, because 365 divided by 8 is 45.6 and the display rounds to whole days.

Input: Cost of goods sold $260,000, average inventory $16,000 for a bakery.

Result: Turnover ratio 16.25x and 22 days inventory outstanding. Fast turnover is normal for short shelf-life goods and would be alarming for furniture.

Frequently asked questions

What counts as a good inventory turnover ratio?: It depends entirely on what you sell. Grocery and food businesses may turn over dozens of times a year while jewellery or heavy equipment dealers may turn over once or twice. The only universally useful comparison is against your own past periods and against direct competitors in the same segment.
Should I use cost of goods sold or revenue?: Cost of goods sold. Inventory sits on the balance sheet at cost, so using revenue compares two different bases and produces a ratio inflated by your margin. If you only have revenue to hand, subtract your gross profit first.
How do I calculate average inventory properly?: Beginning inventory plus ending inventory divided by two is the standard approach and is what most benchmarks assume. If your business is seasonal, averaging twelve month-end balances instead gives a far more honest picture than two points can.
Why does the tool use 365 days?: It converts the ratio into days by dividing 365 by the turnover figure, which is the conventional definition of days inventory outstanding. Some analysts use 360 days instead, which produces a slightly lower day count on the same inputs.
Can I break this down by product line?: Not in this tool. It takes one pair of totals and returns one ratio. Run it separately per category using that category cost of goods sold and inventory, which is usually where the real insight is, since a blended ratio hides both the fast and the dead stock.
Does a very high ratio mean I am doing well?: Not necessarily. Extremely high turnover can mean you are understocked and losing sales to empty shelves, or that you are discounting hard to move goods. Read it alongside stockout frequency and gross margin rather than on its own.

Tips

Run the number quarterly rather than annually. A ratio calculated once a year tells you about a problem long after it has tied up your cash.
Calculate it per category as well as in total. One slow-moving line can drag the blended figure down while the rest of the shop performs well.
If turnover is falling, check whether inventory grew or sales fell before acting. The two causes need opposite responses.
Pair days inventory outstanding with your supplier lead time. Holding fewer days of stock than it takes to restock is how you end up with empty shelves.

Written by Ahsan Mahmood. Last updated 2026-07-21. This calculator runs entirely in your browser and produces estimates, not tax advice.TaxEase — Inventory Turnover Calculator: Ratio and Days on Hand