What Is Inventory Turnover? Formula, Examples, and Tips

Inventory turnover is the number of times a company sells and replaces its entire stock during a specific period — usually a year.

To calculate inventory turnover, divide your cost of goods sold (COGS) by your average inventory value.

Here's the step-by-step process, with examples and tips for growing manufacturers.

How do you calculate inventory turnover?

The inventory turnover formula is straightforward:

Inventory Turnover Ratio = Cost of Goods Sold (COGS) ÷ Average Inventory

Here's a step-by-step approach:

Find your cost of goods sold (COGS) for the time period. You can pull this from your income statement or calculate your total manufacturing cost if you're a manufacturer.

Calculate your average inventory value. Add your inventory value at the beginning of the period to your inventory value at the end of the period, then divide by two.

Average Inventory = (Beginning Inventory + Ending Inventory) ÷ 2

Divide COGS by average inventory. The result is your inventory turnover ratio.

Worked example

Let's say you run a growing manufacturing company that produces skincare products. Over the past year:

COGS: $600,000

Beginning inventory: $120,000

Ending inventory: $80,000

First, calculate average inventory:

($120,000 + $80,000) ÷ 2 = $100,000

Then divide:

$600,000 ÷ $100,000 = 6.0

Your inventory turnover ratio is 6.0. That means you sold and replaced your entire inventory about six times during the year.

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What does inventory turnover tell you?

Inventory turnover provides insights into how well your company manages purchasing costs and how effective your sales efforts have been. Here are the key interpretations:

A higher inventory turnover indicates strong sales. Your company is selling products quickly and there's healthy demand.

A low inventory turnover suggests weaker sales or declining demand for your products. It can also mean you're over-ordering raw materials or finished goods.

Inventory turnover reveals how well you manage stock. A ratio that's too low means you're purchasing beyond demand. A ratio that's too high could mean you aren't keeping enough inventory on hand to meet orders — leading to stockouts.

The ratio creates a check and balance between sales and purchasing. It helps prevent excess purchases while making sure you can still fulfill customer orders.

What does an inventory turnover ratio of 1.5 mean?

An inventory turnover ratio of 1.5 means your company sold and replaced its inventory only 1.5 times during the period. In practical terms, it took you about 8 months to sell through your average stock level.

For most industries, 1.5 is considered low. It usually signals one or more of these issues:

You're carrying too much inventory relative to your sales volume

Demand for your products has slowed

Your purchasing is outpacing what customers actually buy

That said, context matters. If you manufacture expensive, custom-engineered products with long lead times, a ratio of 1.5 might be perfectly normal. But for a consumer goods manufacturer, it would be a red flag worth investigating.

What is inventory turnover in days?

Inventory turnover days — also called days sales of inventory (DSI) — tells you how many days it takes, on average, to sell through your entire inventory. Many manufacturers find this easier to interpret than the ratio alone.

Inventory Turnover Days = 365 ÷ Inventory Turnover Ratio

Using our earlier example:

365 ÷ 6.0 = 60.8 days

That means it takes roughly 61 days to sell through your average inventory. The lower the number of days, the faster you're moving product.

What's a good inventory turnover ratio?

A company's ideal inventory turnover varies greatly by industry. When comparing your ratio against another company, make sure you're comparing within the same industry — otherwise the numbers won't mean much.

Here are some typical ranges:

For example, a grocery chain typically has a much higher turnover because it sells perishable products that can't sit on shelves for long. A company that manufactures construction equipment will naturally have a lower ratio because each unit may sell for hundreds of thousands of dollars and takes time to produce.

To find where you stand, compare your ratio against direct competitors. This gives you a realistic picture of your inventory management efficiency relative to businesses with similar products and sales cycles.

How to improve your inventory turnover ratio

A higher inventory turnover generally means faster inventory movement and less cash tied up in stock. A lower ratio points to inefficiency in managing inventory levels. Here are practical steps you can take to improve your inventory control:

Improve demand forecasting. Understand demand better by talking to your customers, following industry trends, surveying your sales reps, and analyzing past sales data for seasonal patterns. Better forecasts mean you order the right amount at the right time.

Review your pricing strategy. Analyze what will actually increase your overall sales volume. Reducing prices across the board may not be the answer — try different pricing strategies for different customer segments or product lines.

Focus on best-selling products. Double down on the items that move fastest. Push your sales team to promote your top performers, and make sure you always have enough stock of those items.

Increase product demand. Improve your marketing strategy with targeted, cost-effective campaigns. More sales equals more inventory movement, which directly raises your turnover ratio.

Reduce lead times. Work with suppliers to shorten delivery windows so you can order smaller quantities more frequently instead of holding large amounts of safety stock.

Eliminate dead stock. Identify slow-moving and obsolete inventory. Discount it, bundle it, or liquidate it. Dead stock drags down your average inventory number and hurts your ratio.

How Brahmin Solutions can help

Tracking inventory turnover manually — especially when you're juggling raw materials, work-in-progress, and finished goods — gets complicated fast. Brahmin Solutions is a cloud-based manufacturing platform built for growing manufacturers doing $500K–$50M in revenue. It gives you real-time inventory visibility, automatic COGS tracking, and the reporting you need to monitor your turnover ratio without digging through spreadsheets.

If you'd like to see how it works for your operation, book a demo.

Frequently asked questions

What does an inventory turnover ratio of 1.5 mean?

A ratio of 1.5 means you sold and replaced your inventory about one and a half times during the period. For most industries that's considered low, suggesting you may be holding too much stock relative to sales. However, industries with high-value, slow-moving products (like heavy equipment) may see this as normal.

What is a good inventory turnover ratio?

A good ratio depends on your industry. For most manufacturers and retailers, a ratio between 5 and 10 is considered healthy. Perishable goods businesses often see ratios above 10, while heavy machinery companies may operate normally at 1–3. Compare against direct competitors for the most useful benchmark.

How do you calculate inventory turnover from a balance sheet?

Pull your cost of goods sold (COGS) from your income statement. Then find the inventory values on your balance sheet at the start and end of the period. Average those two numbers and divide COGS by the result. For example, if COGS is $500,000 and average inventory is $100,000, your turnover ratio is 5.0.