How this calculator works
Inventory turnover measures how many times inventory is sold and replaced during a period. It is useful for ecommerce, retail, wholesale, restaurants, and product-based businesses.
Inventory turnover = COGS ÷ average inventory
Inventory days = 365 ÷ inventory turnover
Inventory days = 365 ÷ inventory turnover
Very low turnover may indicate slow-moving inventory. Very high turnover can also create stockout risk.
How to use this calculator
- Enter realistic values that match your current situation.
- Press Calculate to refresh the estimate.
- Compare the main result with the supporting details in the result panel.
- Change one input at a time to see which variable affects the result most.
Planning note: Inventory Turnover Calculator gives an educational estimate. It does not include every tax rule, fee, platform policy, market condition, or personal constraint, so use it as a quick planning reference rather than a final decision.
FAQ
What is inventory turnover?
It measures how often inventory is sold and replaced during a period.
What are inventory days?
Inventory days estimate how long inventory sits before being sold.
Is higher turnover always better?
Not always. Very high turnover can mean stockouts or understocking.
What causes low turnover?
Overstocking, weak demand, poor purchasing, or obsolete products.
Should I use annual COGS?
Yes, if you want annual turnover. Use consistent periods for COGS and inventory.