Inventory turnover ratio calculator for one clear period
Enter cost of goods sold with the beginning and ending inventory balances from the same period. The result shows the average inventory, how often it turned, and the estimated days represented by that rate.
Three balances must describe the same activity
Cost of goods sold measures the cost attached to sales during the period. Beginning and ending inventory are balance points around that activity. Mixing monthly cost with annual inventory, or mixing selling value with inventory cost, creates a ratio that looks precise but cannot be interpreted.
- ✓Use the same currency and accounting basis.
- ✓Include the number of days covered by the cost figure.
- ✓Review material write-downs or stock corrections before comparing periods.
A faster turn is not automatically a better result
A high turnover can show strong movement, but it can also sit beside stockouts and missed demand. A low turnover can reflect excess stock, a seasonal purchase, long lead times, or items held for a specific contract. Compare like periods and investigate the operating reason behind the change.
- ✓Compare one product group or business model at a time.
- ✓Read service levels and availability beside the ratio.
- ✓Treat this result as a review prompt, not a universal benchmark.
Continue from calculation to workflow
Use the result as an input to planning—not as a standalone system decision.
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