Inventory turnover is a ratio that measures how many times a business sells and replaces its stock over a given period — typically a year. It is calculated as:
Inventory turnover = Cost of goods sold (COGS) ÷ Average inventory value
A turnover of 6 means the business sold and replaced its average inventory six times over the period. Higher generally means capital moves faster and stock stays fresher; lower generally means cash and warehouse space are tied up in goods that aren't selling.
How do you calculate inventory turnover?
Average inventory is usually taken as (beginning inventory + ending inventory) ÷ 2, to smooth out seasonal snapshots. A worked example, figures illustrative:
| Line |
Value |
| Annual COGS |
€600,000 |
| Beginning inventory |
€90,000 |
| Ending inventory |
€110,000 |
| Average inventory |
€100,000 |
| Inventory turnover |
6.0× per year |
| Days inventory outstanding (365 ÷ 6.0) |
≈ 61 days |
That last line — days inventory outstanding — is often the more intuitive way to read the same number: on average, stock sits about 61 days before it sells.
What counts as a good inventory turnover ratio?
There is no single universal target — the right ratio depends entirely on the category. Fast-moving consumer goods and perishables turn over many times a year; furniture, appliances, and seasonal or luxury goods turn over far less by nature, without that being a sign of poor management. The only benchmark that actually means something is your own category and your own history: is turnover improving or declining, and how does it compare to direct competitors in the same product type — not to inventory ratios from an unrelated industry.
Why does turnover differ so much by market?
For cross-border brands, the same SKU can carry very different turnover in different countries — and the reasons are structural, not just demand. Longer import and customs lead times push brands to hold more safety stock per market, which lowers turnover even at identical sell-through rates. A newly launched market naturally turns slower than an established one simply because demand hasn't caught up to the stocking decision yet. This is why turnover, like landed cost, needs to be read per SKU, per market — a single blended number hides more than it reveals, and our FAQ on syncing inventory across marketplaces touches on the same per-market reality.
What do brands get wrong with inventory turnover?
- Chasing turnover as a goal in itself. Pushing turnover up by underordering causes stockouts and lost sales — the ratio is a diagnostic, not a target to maximize blindly.
- Comparing turnover across unrelated categories. A grocery brand's turnover and a furniture brand's turnover measure fundamentally different businesses; only compare within a category.
- Reading one blended number across all markets. A healthy global average can hide a fast-moving home market and a slow-moving new one accumulating aged stock underneath it.
- Ignoring what low turnover is actually telling you. Declining turnover on a specific SKU is often the earliest warning sign of a pricing problem, a demand shift, or a failed market-entry decision — worth investigating before it becomes a bigger write-off.
FAQ
What is a good inventory turnover ratio?
There's no universal number — it depends heavily on the product category. Fast-moving goods naturally turn over many times a year; durable or seasonal goods turn over far less without that indicating a problem. The most useful comparison is against your own history and direct competitors in the same category.
What does low inventory turnover mean?
It generally means stock is sitting longer before selling — which ties up cash and warehouse space, and can signal overordering, weakening demand, or pricing that's out of step with the market. It isn't automatically bad, but it's worth investigating per SKU rather than ignoring.
How can a brand improve inventory turnover?
Better demand forecasting to avoid overordering, clearing slow-moving stock through pricing or promotions before it ages further, and holding inventory closer to where lead times are shortest all raise turnover — the fix depends on which of those is actually driving the low ratio for a given SKU.
Tracking turnover accurately per SKU, per market — and knowing what's actually driving it — is core to running inventory profitably across borders. eBrands manages this for every brand we operate, through the Apollo data platform, across every channel and market — see how we operate brands end to end.
