How Shopify merchants use Inventory Turnover
Turnover connects buying to cash flow; higher turnover means less capital tied up. It identifies 'slow-sellers' to optimize product mix.
Formula
Inventory Turnover = (Cost of Goods Sold (COGS) / Average Inventory)
COGS is the cost at the point of sale. Average inventory is the mean of beginning and ending inventory values.
What matters in practice
- Links directly to Days of Inventory (DOH ≈ 365 / Turnover).
- Low turnover signals overstock; extremely high turnover may mean stockouts.
- Using revenue instead of COGS is a common error that inflates the metric.
Why it matters
Common merchant pain points
- • Capital locked in slow-moving SKUs instead of winners.
- • Distorted KPIs during seasonal peaks due to poor average inventory tracking.
Native Shopify limitations
- • Shopify does not directly expose turnover KPIs across the catalog.
- • Category-level turnover requires external tools or manual spreadsheets.
Benchmarks and reference points
Ecommerce benchmarks suggest a target turnover of 4–6 per year.
Fast fashion and beauty often achieve 6–10 turns per year.
How to apply this in practice
Step 1
Identify Annual COGS
Export your 'Finances' report from Shopify Admin for the last 12 months.
Step 2
Average Your Stock Value
Take your starting inventory value and ending inventory value for the year and divide by two.
Step 3
Divide COGS by Average
The resulting number is your turnover ratio; aim for 4 or higher for healthy cash flow.
Examples
Identifying Dead Weight
A merchant finds a product with a turnover of 0.5 (selling once every two years) and decides to clear it out.
Inventory Expansion
A brand with a turnover of 12 increases their order quantities to avoid the constant risk of stockouts.
Frequently asked questions
Related resources
Related guides
- Inventory Turnover Improvement Shopify
- Dead Stock Reduction for Shopify Brands: Turn Shelf Sitters into Cash
Understand what dead stock really costs your Shopify brand - in carrying costs, cash lockup, and margin erosion - and how to prevent it using better forecasting, OTB, and reporting. Includes identification methods, liquidation strategies, and a prevention checklist.
Related calculators
- Inventory Turnover Calculator for Shopify | Free Formula + Benchmarks
Calculate your inventory turnover rate and days of inventory (DSI). Use the free Synplex inventory turnover calculator with industry benchmarks and Shopify-specific guidance.
Related glossary terms
- Reorder Point (ROP)
Reorder point is the inventory level at which a new purchase order should be placed so that replenishment arrives before existing stock is depleted.
- Safety Stock
Safety stock is the extra inventory held above expected demand to reduce the risk of stockouts caused by variability in demand or lead times.
- Days of Inventory (DOH)
Days of inventory on hand estimates how many days current inventory will last at the current rate of sales.