What Is a Good Inventory Turnover Ratio? (2026 Benchmarks)
A good inventory turnover ratio for most ecommerce brands is roughly 4–8x a year — but the right number depends heavily on your category, margin, and channel mix. Here's the formula, the benchmarks, and why the "higher is better" instinct can backfire.
Quick Answer
Inventory turnover ratio = how many times you sell through and replace your average inventory in a year.
A good ratio for most ecommerce brands is roughly 4–8x. Below ~4x often signals overstock and cash tied up; above ~10–12x can mean you're running too lean and risking stockouts. But it's category-dependent: fast-moving consumables turn 10–15x+, while high-AOV durables may be healthy at 2–4x. The goal isn't the highest number — it's the turnover that maximizes margin without stocking out.
How to calculate (and read) inventory turnover
The formula
Turnover = COGS ÷ average inventory at cost. Average inventory = (beginning inventory + ending inventory) ÷ 2 for the period. Example: $1.2M COGS over the year, average inventory of $200K at cost → turnover = 6.0x. That means you cycled through your stock six times.
Use COGS, not revenue. Dividing revenue by inventory inflates the ratio because revenue includes margin; the textbook ratio uses cost on both sides.
Convert to days (the more useful view)
Turnover is easier to act on as Days Inventory Outstanding (DIO), a.k.a. days of supply:
A 6.0x turnover = ~61 days of inventory on hand. Now it's a planning number: "I'm holding about two months of stock." That's the lens that connects to reorder points and lead times.
Why higher isn't automatically better
High turnover frees cash and cuts storage cost — but pushed too far it means thin cover, more stockouts, lost sales, and (on Amazon) low-inventory-level fees plus rank damage when you run dry. Very low turnover means cash frozen in stock and, on Amazon, aged-inventory surcharges and peak storage fees. The healthy zone is a band, not a maximum.
The multi-channel catch
A single blended turnover ratio hides the truth when you sell on several channels. The same SKU can turn 12x on Amazon and 3x on your Shopify store. The blended 6x looks fine while you're simultaneously stocking out on Amazon and sitting on dead Shopify stock. Turnover is only actionable measured per SKU per channel.
Inventory turnover benchmarks (2026, directional)
| Brand / category type | Typical healthy turnover | Days of supply (DIO) |
|---|---|---|
| Consumables / fast-moving CPG | 10–15x+ | ~24–36 days |
| General ecommerce / multi-channel | 4–8x | ~46–91 days |
| Apparel / seasonal | 4–6x | ~61–91 days |
| High-AOV durables / niche | 2–4x | ~91–180 days |
Directional ranges, not hard rules — benchmark against your own category and margin profile. A low-margin product needs higher turnover to be healthy; a high-margin one can sit longer.
The honest caveat
Turnover is a lagging, aggregate metric — useful for a health check, weak for decisions. It tells you what happened across your whole catalog last period; it doesn't tell you which specific SKU to reorder this week. Two brands with an identical 6x can be in completely different shape: one balanced, one stocking out on winners while drowning in dead stock that averages out. Use turnover to spot that something's off, then drill to per-SKU, per-channel velocity and days-of-supply to actually fix it.
Frequently asked questions
What is a good inventory turnover ratio?
For most ecommerce brands, roughly 4–8x a year is healthy. Below ~4x often signals overstock and cash tied up; above ~10–12x can mean you're too lean and risking stockouts. It's category-dependent though — fast-moving consumables can be healthy at 10–15x+, while high-AOV durables may be fine at 2–4x. The right target maximizes margin without stocking out.
How do you calculate inventory turnover?
Inventory Turnover = COGS ÷ average inventory at cost, where average inventory = (beginning + ending inventory) ÷ 2 for the period. Example: $1.2M COGS ÷ $200K average inventory = 6.0x. Use COGS (not revenue) on the top — revenue includes margin and inflates the ratio.
What is the difference between inventory turnover and days of supply?
They're two views of the same thing. Turnover counts how many times you cycle inventory per year; days of supply (DIO) = 365 ÷ turnover, so a 6.0x turnover = ~61 days on hand. Days of supply is usually more actionable because it connects directly to lead times and reorder timing.
Is a higher inventory turnover always better?
No. Higher turnover frees cash and cuts storage cost, but pushed too far it means thin cover, more stockouts, lost sales, and on Amazon low-inventory-level fees plus rank damage. Very low turnover means cash frozen in stock and aged-inventory surcharges. The healthy zone is a band, tuned per SKU — not a maximum to chase.
What’s a good inventory turnover for Amazon sellers?
It varies by category, but Amazon's fee structure rewards tighter turnover than a pure DTC store — aged-inventory surcharges (181+ days) and peak Q4 storage make slow-moving FBA stock expensive. Many Amazon sellers target faster turns on FBA than on their own site for the same SKU, which is exactly why a single blended ratio is misleading. See how FBA storage fees punish slow turnover here.
How do I improve my inventory turnover?
Forecast more tightly so you order closer to true demand (less overstock), clear dead and aged stock before it accrues surcharges, and set reorder points per SKU per channel rather than padding everything. Improving turnover is mostly a forecasting-accuracy problem — the better your demand signal, the less excess you carry and the higher your turns without risking stockouts.