Updated March 2026
Inventory Turnover Ratio: What It Means for Inventory Management
Inventory turnover ratio measures how many times you sell through your entire inventory in a given period. A higher ratio means you're selling stock faster. A lower ratio means inventory is sitting on shelves longer.
The Formula
Inventory Turnover = Cost of Goods Sold ÷ Average Inventory Value
COGS is the total cost of products sold during the period (not revenue — use cost price). Average inventory value is (beginning inventory + ending inventory) ÷ 2, both at cost.
Example
Your Shopify store had $480,000 in cost of goods sold last year. Your average inventory value (at cost) was $80,000.
Inventory Turnover = $480,000 ÷ $80,000 = 6.0
Your inventory turnover ratio is 6.0.
You turned over your entire inventory 6 times last year, or roughly every 2 months (365 ÷ 6 = 61 days). For most DTC ecommerce brands, a turnover of 4-8 is healthy.
Why It Matters for Shopify Merchants
Inventory turnover tells you how efficiently your cash is working. A ratio of 6 means every dollar in inventory generates $6 in COGS per year. A ratio of 2 means that same dollar only generates $2. For DTC brands, cash efficiency is everything — especially when you're growing and every dollar tied up in slow-moving inventory is a dollar you can't spend on marketing or new product development. Low turnover also signals potential dead stock that you'll eventually discount or write off.
How Alertr Helps
Alertr tracks sell rates per SKU daily, giving you real-time visibility into which products are moving and which are sitting. You can spot slow movers early — before they become dead stock — and adjust purchasing or run promotions to clear them.
Related Terms
Frequently Asked Questions
What's a good inventory turnover ratio?
For DTC ecommerce, 4-8 is healthy. Fashion and trend-driven products tend higher (8-12). Durable goods or specialty items tend lower (2-4). Compare against your own history and industry benchmarks, not a universal number.
Can turnover be too high?
Yes. Extremely high turnover (12+) can mean you're frequently running low on stock and losing sales. It can also mean you're not buying in sufficient quantities to capture bulk discounts. Balance turnover against service level.
How do I improve inventory turnover?
Three levers: sell more (marketing, promotions), stock less (lower safety stock, tighter ordering), or discontinue slow movers. Start by identifying your bottom 20% of SKUs by turnover and deciding whether to promote, discount, or drop them.
Should I calculate turnover per SKU or for the whole store?
Both. Store-wide turnover gives you the big picture. Per-SKU turnover identifies specific products that need attention. Most inventory management tools, including Alertr, track sell rates at the SKU level which feeds into per-product analysis.
Skip the Manual Calculations
Alertr tracks sell rates and forecasts stock levels automatically from your Shopify data. Inventory forecasting and reorder alerts. Free tier available, no credit card required.
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