The inventory turnover ratio measures how many times a business sells and replenishes its stock over a particular period. The ratio shouldn’t be too high or too low, but just right.
With this guide, learn what’s considered a good inventory turnover ratio across different industries, plus how to calculate and improve it in your company. Also, see why working with a fulfillment partner like AMS Fulfillment can lead to a healthy inventory turnover.
Table of Contents
- How to Calculate Your Inventory Turnover Ratio
- What Is Considered a Good Inventory Turnover Ratio?
- How Can You Improve Your Inventory Turnover Ratio?
- The Role of Fulfillment Strategy in Inventory Turnover
- Improving Your Inventory Turnover Ratio
- FAQs
How to Calculate Inventory Turnover Ratio
With your inventory turnover ratio at your fingertips, you can quickly see how efficiently you’re selling and replacing stock over a specific period.
The Standard Inventory Turnover Formula
Inventory turnover ratio = Cost of Goods Sold (COGS) ÷ Average Inventory
Here’s a step-by-step breakdown for calculating this formula:
Step 1: Determine Your Cost of Goods Sold (COGS) for the Period
COGS is the total cost of purchasing or producing the items you sold. It appears on your income statement, and you can calculate it using the formula below:
COGS = (Beginning Inventory + Purchases) − Ending Inventory
- Beginning inventory is the cost of inventory you had at the start of the period.
- Purchases are the cost of any new inventory you bought during the period.
- Ending inventory is the cost of inventory left at the end of the period.
Step 2: Calculate the Average Inventory
Add your beginning inventory and ending inventory for the period, then divide the total by two.
Average Inventory = (Beginning Inventory + Ending Inventory) ÷ 2
Step 3: Divide COGS by average inventory
The result is your inventory turnover ratio.
So, what exactly does it mean for your business? The following example shows how to calculate and interpret your inventory turnover ratio.
Example of inventory turnover ratio calculation
For the year 2025, an online shoe retailer started with $6,000 in inventory. The cost of goods sold during that period was $13,000. By the end of the year, its remaining inventory was valued at $3,000. Using this information, let’s calculate the retailer’s inventory turnover ratio for 2025.
- COGS: $13,000
- Average Inventory: [$6,000 (Beginning Inventory) + $3,000 (Ending Inventory)] ÷ 2 = $4,500
- Inventory Turnover Ratio (COGS ÷ Average Inventory): $13,000 ÷ $4,500 = 2.89
This means the company sold and replaced its entire stock of goods 2.89 times during the year.
Alternative Calculation Methods
Some businesses use sales revenue instead of COGS in the formula, which looks like this:
Inventory Turnover Ratio = Sales Revenue ÷ Average Inventory
This approach can be useful if COGS data isn’t available. For example, a small eCommerce business or dropshippers might lack a system for tracking inventory purchases.
Note: Using sales revenue instead of COGS in the inventory turnover formula makes the ratio appear higher than it really is, giving a misleading sense of inventory turnover efficiency. That’s because it includes profits.
Besides the sales revenue method, you can also measure inventory turnover efficiency by calculating the average number of days your company holds stock before selling it, also known as days inventory outstanding (DIO).
DIO = Number of Days in a Period ÷ Inventory Turnover Ratio for That Period
If a company’s inventory turnover ratio for a particular year is 2.89: DIO = 365 (days in a year) ÷ 2.89 = 126.3 days.
This means that, on average, it takes the company about 126 days to sell through its inventory on hand.
Common Calculations Mistakes to Avoid
The following common mistakes when calculating your inventory turnover ratio can cause misleading results.
- Using inconsistent time periods: Your COGS and inventory figures should cover the same time frame, whether it’s monthly, quarterly, or annually. Mixing periods, for example, using monthly inventory figures with annual COGS, will throw off your ratio.
- Failing to account for inventory write-offs or adjustments: After purchasing inventory, you may remove damaged, expired, or obsolete products from your books. Be sure to reflect these changes in your inventory turnover calculations. Ignoring them can make your ratio look healthier than it is.
- Not separating different product categories: Some products sell faster than others. Grouping fast-moving and slow-moving items can make performance look better (or worse) than it is. Calculating turnover by category gives you much better insight.
- Overlooking inventory valuation methods: FIFO (first in, first out) and LIFO (last in, first out) affect how COGS and inventory value are calculated. In periods of rising prices, FIFO usually results in lower COGS and higher ending inventory, while LIFO leads to higher COGS and lower ending inventory. Ignoring these differences can result in misleading comparisons and incorrect conclusions about inventory performance.
What Is Considered a Good Inventory Turnover Ratio?
There isn’t a single inventory turnover ratio that applies to all businesses. A “good” ratio varies significantly by industry and business model.
Here are the average inventory turnover ratios by industry as of the last quarter of 2025, according to CSIMarket:
| Sector | Inventory turnover ratio |
| Financial | 64.59 |
| Services | 41.48 |
| Retail | 10.14 |
| Energy | 9.15 |
| Transportation | 8.74 |
| Basic Materials | 6.01 |
| Consumer Non-Cyclical | 5.70 |
| Technology | 4.33 |
| Consumer Discretionary | 4.08 |
| Capital Goods | 3.77 |
| Healthcare | 2.45 |
| Conglomerates | 1.95 |
Benchmarking your inventory turnover ratio against peers in your sector helps you determine if your current efficiency levels are competitive and whether you’re keeping up with industry best practices.
If your inventory turnover ratio is too high, it may indicate understocking, which can lead to lost sales. If it’s too low, it may suggest overstocking, which increases holding costs and the risk of inventory becoming obsolete.
In addition to using industry benchmarks, compare your current ratio with past ones. Doing so reveals whether your inventory management is improving or worsening over time.
Other factors that can influence your ideal inventory turnover include:
- Business size: Larger organizations often have higher turnover ratios because they move inventory faster.
- Growth stage: Startups may have lower turnover at first, which typically increases as the business grows and captures more market share.
- Business strategy: Sales campaigns can accelerate inventory movement, resulting in higher turnover.
How Can You Improve Your Inventory Turnover Ratio?
Improving your inventory turnover ratio involves speeding up the movement of inventory and avoiding excess stock. But how exactly do you achieve that?
Take Advantage of Demand Forecasting and Planning
Analyze your historical sales patterns and seasonal trends to identify what your customers are likely to buy. Use data-driven forecasting tools to help you predict demand more accurately and save time. By analyzing both consumer demand and market demand, you can optimize your sales inventory to better align with actual market trends and capture more sales opportunities.
With accurate forecasts, you stock just the right amount of inventory you need to meet demand without overstocking (which slows inventory turnover) or understocking. However, be aware of the risk of insufficient inventory, which can lead to stockouts and missed sales opportunities, especially during spikes in demand.
That said, forecasts aren’t perfect on their own. Keep an eye on real-time market trends, like which products are currently selling fast, and adjust your purchases accordingly. This ensures you always hold enough high-demand items.
Optimize Your Product Mix
Conduct regular inventory audits to spot:
- Bestsellers and high-margin products: Allocate more of your inventory budget and storage space to these items.
- Slow-moving SKUs: You can discontinue them or bundle them together with bestsellers to boost sales and improve inventory turnover.
- Dead stock: Damaged items, leftover seasonal products, or any excess stock that won’t sell take up warehouse space, unnecessarily increasing storage costs. When you remove them, you only remain with inventory that sells, which can improve your turnover ratio.
Use Strategic Pricing and Promotions
Several pricing techniques and sales campaigns can help you speed up sales and clear slow-moving inventory off your shelves before it becomes obsolete.
Adjust prices based on demand and sales velocity (dynamic pricing). For example, if aging inventory is moving more slowly than you’d like, you can significantly reduce prices for a limited time to stimulate demand. To avoid offering discounts to customers who would have paid full price, your clearance sales campaign can target specific audiences, such as cart abandoners.
On top of that, consider lowering the prices of aging products permanently so that they sell quickly before they become obsolete. You can also offer volume discounts. This will encourage customers to buy large quantities of a product in order to pay less per unit.
Streamline Your Supply Chain
To make your supply chain more efficient and improve inventory movement:
- Work with a reliable supplier to reduce lead times.
- Use the just-in-time (JIT) inventory management technique, in which you buy stock only when demand is high, reducing holding costs and improving turnover.
- Adopt a dropshipping eCommerce business model if you don’t want to hold inventory for all or certain products you sell online.
- Use inventory software and warehouse management systems (WMS) to track stock levels in real time, automate optimized replenishment, and identify slow-moving items early.
- Team up with a third-party logistics (3PL) partner like AMS Fulfillment, which has the skills and tech tools to streamline inventory management and improve supply chain visibility.
The Role of Fulfillment Strategy in Inventory Turnover
Your fulfillment strategy can influence how fast your inventory moves.
For example, storing stock in multiple warehouses closer to your customers reduces shipping costs by ensuring you fulfill orders from the nearest storage facility.
By using a distributed, multi-warehouse fulfillment model, you can lower shipping costs and reduce abandoned carts, which can boost sales and, in turn, accelerate inventory turnover. Optimizing inventory levels and maintaining the right inventory balance across warehouses not only improves order fulfillment but also enhances overall business performance by ensuring efficient inventory management.
And you don’t have to own any warehouses.
A 3PL company like AMS Fulfillment serves numerous eCommerce brands, enabling it to provide shared warehouse space across multiple strategic locations that reduce the overall storage costs. 3PL partners also offer:
- Tools for real-time inventory tracking and reporting
- Better inventory allocation across multiple locations
- Expertise in inventory optimization strategies
Improving Your Inventory Turnover Ratio
There’s no single number that’s considered a good inventory turnover ratio for all businesses; it varies significantly by industry. Compare your ratio with your industry’s benchmarks and improve it over time to stay competitive.
A fulfillment partner like AMS can help you improve inventory turnover through optimized stock management and strategic multi-warehouse fulfillment that speeds up delivery and reduces shipping costs. Talk with a fulfillment expert today to see how AMS can help you improve your inventory management and shipping.
FAQs
What does a low inventory turnover ratio indicate?
A low inventory turnover ratio usually means products are sitting in the warehouse too long, tying up cash and increasing storage costs. It can also point to weak sales, excess inventory, or obsolete inventory; issues that may result from overstocking, insufficient demand, or poor product performance.
Can an inventory turnover ratio be too high?
Yes. An extremely high ratio may signal understocking, which can lead to stockouts, missed sales, and unhappy customers. It can also mean frequent reordering, which increases shipping and admin costs.
How often should I calculate my inventory turnover ratio?
Most businesses should calculate inventory turnover at least once a quarter. If you sell fast-moving products or operate in a rapidly changing market, calculating the ratio monthly gives you even better visibility. You can also use annual calculations for long-term planning.
