Inventory Turnover Calculator
How many times does inventory turn over per year? The single most important inventory efficiency metric.
Free · No signup · By the analysts at Blackridge Research · Updated 2026-08-13
Inputs
Results
What this means
Adjust the inputs to calculate.
About the Inventory Turnover Calculator
Inventory turnover measures how many times inventory is sold and replaced over a year.
It is the single most important metric for inventory efficiency.
Formula
Inventory Turnover = COGS / Average Inventory
- IT
- — Inventory Turnover (times per year)
- COGS
- — Cost of Goods Sold (annual)
- AI
- — Average Inventory (over the period)
How to use this calculator
- 1
Enter COGS
Annual cost of goods sold.
- 2
Enter average inventory
Average inventory value over the period.
Example calculations
Distribution center performance
A DC has $5M in COGS and $1M in average inventory.
Turnover = $5M / $1M = 5 times per year.
- Inventory turnover:
- 5.0×
- Days in inventory:
- 73 days
Inventory turns 5 times per year — average inventory held for 73 days.
Interpreting your results
Higher turnover means more efficient inventory management. Industry averages vary significantly.
Too high turnover may indicate stockouts; too low may indicate overstocking.
Need the market data behind this calculator?
The Inventory Turnover Calculator is only as good as its inputs. Blackridge Research publishes syndicated market reports with vetted market sizes, growth rates, and competitive landscapes across 40+ industries — and builds custom studies when the shelf report doesn't exist.
Industry applications
Business
- Inventory management: monitor and improve efficiency.
- Working capital: reduce inventory carrying costs.
- Performance measurement: benchmark against industry.
Construction
- Material inventory: track material turnover for supply chain.
- Equipment parts: manage spare parts inventory efficiently.
Research
- Supply chain analysis: study inventory performance.
- Financial analysis: assess working capital efficiency.
Common mistakes to avoid
-
✗ Using sales instead of COGS
Use COGS, not sales revenue, for accurate turnover.
-
✗ Using ending inventory
Use average inventory over the period.
Frequently asked questions
›What is a good inventory turnover?
Depends on industry. Grocery: 15-20×. Auto parts: 3-5×. Construction materials: 4-8×.
›How can I improve inventory turnover?
Reduce order quantities, improve forecasting, and eliminate slow-moving items.
Glossary
- Inventory turnover:
- How many times inventory is sold and replaced per year.
- COGS:
- Cost of Goods Sold — the direct cost of producing goods.
- Days in inventory:
- Average number of days inventory is held before sale.
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