Inventory turnover is a central KPI in logistics. A high turnover rate reduces storage costs, improves liquidity, and increases supply chain efficiency. In this article, you will learn how to calculate inventory turnover, which formula to use, and what measures you can take to optimize your stock.
Table of contents:
- Inventory turnover: Definition
- Formula: Calculating inventory turnover
- Measures: Improving inventory turnover
- Impact of increasing inventory turnover
- Inventory turnover: A question of the right balance
Inventory turnover: Definition
Inventory turnover indicates how often the stock of a product or product range is sold or consumed within a defined period. It is a key metric in inventory management for evaluating the efficiency of warehouse processes and minimizing capital commitment.
The higher the inventory turnover, the better: Products do not sit in the warehouse for long, liquidity is freed up, and delivery capability is maintained.
Formula: Calculating inventory turnover
There are various ways to determine inventory turnover. A widely used and simple formula is based on sales and is as follows:
Sales / average total capital = inventory turnover
So, if you generate 100,000 euros in revenue per year with a product and the average inventory value of that product is 20,000 euros, the inventory turnover rate is 5. In other words, the inventory turns over five times per year. Another formula for calculation considers inventory levels over a predetermined period:
Inventory issues / average inventory = inventory turnover rate
For logistics professionals, inventory reach is also of great importance when planning inventory management. This can be calculated using the inventory turnover rate as follows:
Average inventory (for the period) / consumption (for the period) = inventory reach
You can find more information on calculating inventory turnover here.
What is a good inventory turnover rate?
The target value varies depending on the industry, product type, and season. As a rough guideline, for example, in retail:
- < 0.5 → inventory turnover too low → reduce stock
- 2–4 → recommended range for B2C retail
- > 6 highly efficient, especially for perishable or seasonal products
Note: The optimal inventory turnover rate also depends on the type of warehouse, availability, and service levels.
However, if the inventory turnover rate is below 0.5, a reduction in stock is generally recommended—anything else ties up capital unnecessarily. It is important to note, however, that not all warehouses are the same. Depending on the specific type of warehouse, these benchmarks may vary. Therefore, you should view these figures as guidelines rather than fixed targets.
Increasing inventory turnover: 5 measures
To optimize your inventory turnover rate, you have a wide range of options available:
1. Classify inventory (ABC/XYZ)
Categorize products by sales or turnover. A-products should always be available, while C- and D-products may need to be reduced or delisted.
2. Identify and clear out slow-moving items
Products with a low turnover rate tie up capital. Targeted reduction of these stock levels or the use of clearance sales can help.
3. Use forecasting tools
Improve your sales planning with data analysis and forecasting. Take seasonal fluctuations and regional differences into account.
4. Adjust procurement strategy
Instead of infrequent large orders: smaller order quantities at shorter intervals. This lowers storage costs—provided that supply chains are stable.
5. Increase supply chain transparency
Avoid excess safety stock by using a better data foundation and real-time information across the entire supply chain.
Impact of increasing inventory turnover
Increasing inventory turnover leads directly to a sustainable improvement in your liquidity. Your company's capital commitment is optimized and reduced. It should be noted, however, that a higher inventory turnover also increases the risk of stockouts.
Improve rankings and credit ratings
An effect that should not be underestimated: improving inventory turnover usually results in better creditworthiness or a higher ranking. This is because financial institutions often specifically scrutinize these and other logistics metrics of a company. Above all, however, increased inventory turnover has a direct impact on working capital and cash flow.
FAQ: Frequently asked questions about inventory turnover
What is meant by inventory turnover?
This metric describes how often inventory is sold or moved within a specific period. The higher the value, the more efficient the warehouse.
How is inventory turnover calculated?
You can use either revenue / average inventory or cost of goods sold / average inventory.
How does a high inventory turnover rate affect a company?
It increases liquidity, reduces costs, and improves your credit rating. At the same time, it lowers the risk of overstocking or obsolete goods.
How can you increase inventory turnover?
Through targeted inventory management measures such as classification, better planning, smaller order quantities, and a transparent supply chain.
