How quickly is my inventory selling?
See how efficiently your inventory is moving and how long your stock lasts. Compare similar periods and product categories. High turnover may indicate efficient inventory use or too little stock. Low turnover may reflect seasonality, slow sellers or deliberate safety stock.
The formula, explained.
Average inventory = (beginning + ending inventory) ÷ 2 Turnover = period COGS ÷ average inventory Days inventory = period days ÷ turnover
A worked example
How to interpret your result
Compare similar periods and product categories. High turnover may indicate efficient inventory use or too little stock. Low turnover may reflect seasonality, slow sellers or deliberate safety stock.
Common mistakes to avoid
Use cost of goods sold and inventory valued at cost. Dividing sales revenue by inventory cost mixes two valuation bases.
Frequently asked questions
What does this result include?
The result includes the inputs shown above and any advanced costs you enter. Inventory is valued at cost and matched to period COGS. Check the formula and cost breakdown for the exact scope.
Can I change the assumptions?
Yes. All inputs can be edited, and advanced assumptions are available below the main inputs. Use values from the same period and currency. Changing display currency changes the symbol, not the underlying amount.
Are my financial numbers saved?
No. Calculations happen locally in your browser. Sharing creates a link containing the inputs, and exporting saves a CSV report to your device. You choose whether to share those artifacts.
Learn more about our calculation methodology and estimate limitations.