Inventory Turnover Ratio: What It Is, Why It Matters, How to Calculate It
Inventory turnover ratio measures how many times a business sells and replaces inventory during a period. It is one of the clearest signals of whether stock is moving efficiently.
What is inventory turnover ratio?
Inventory turnover ratio compares cost of goods sold to average inventory. A higher number usually means stock sells through quickly. A lower number can point to overstocking, slow-moving items, or weak demand.
The right turnover depends on the industry. Grocery and consumables turn faster than equipment, furniture, or specialty parts.
The formula: COGS divided by average inventory
Inventory turnover = Cost of Goods Sold / Average Inventory. Average inventory is usually beginning inventory plus ending inventory, divided by two.
For example, if annual COGS is $500,000 and average inventory is $100,000, turnover is 5. That means the business sold through inventory about five times during the year.
What is a good inventory turnover ratio?
There is no universal target. Compare against your category, margin model, and supplier lead times. A high turnover can be good, but too high may mean you are understocked and losing sales.
How to improve inventory turnover
Improving turnover usually means reducing excess inventory while protecting availability for important items. Start by identifying slow movers, dead stock, and items that repeatedly stock out.
- Set reorder points based on real usage and lead time.
- Run cycle counts on high-value and fast-moving items.
- Clear dead stock with discounts, bundles, or returns.
- Shorten supplier lead times where possible.
- Use low-stock alerts instead of buying large safety buffers.
How StockZip helps track turnover inputs
StockZip keeps item movement, quantities, receiving, and stock adjustments in one place. That makes it easier to trust the inputs behind turnover analysis instead of relying on stale spreadsheets.