A clear result in a few inputs.
- Enter the requested values.Use consistent units and the real values for your scenario.
- Read the main result and breakdown.NumLuma recalculates immediately when an input changes.
- Check the formula and assumptions.Use the supporting context before making a real-world decision.
What this calculator does
Inventory turnover compares cost of goods sold with average inventory to estimate how many times inventory is sold or used during a period. NumLuma also converts turnover into an approximate days-in-inventory figure using a 365-day year.
What to know before you use the result
- COGS and average inventory should cover the same period, commonly one year.
- Average inventory is usually more representative than ending inventory alone.
- A higher turnover is not automatically better if it creates stockouts or lost sales.
Common mistakes to avoid
- Using revenue instead of COGS in the standard turnover formula.
- Using ending inventory when inventory levels fluctuate heavily.
- Comparing turnover across industries with very different inventory models.
Where this calculation is useful
Retail operationsInventory planningWorking-capital analysisPerformance reporting
Related concepts
inventory turnoverdays inventoryCOGSaverage inventory