Inventory Turnover Calculator
Last updated: October 15, 2026
Calculate inventory turnover and estimated days inventory on hand.
Inventory turnover
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- Average inventory: —
- Days inventory on hand: —
- Average inventory as % of COGS: —
On this page
Quick summary: Calculate inventory turnover and estimated days inventory on hand.
Read the method, example and limitations
Updated reference sections in this guide are in English.
Guide language: English. Updated October 15, 2026.
What this calculator estimates
Inventory Turnover Calculator
Inputs and units
Use the units shown for Cost of goods sold for the period ($), Beginning inventory ($), Ending inventory ($), Days in the measurement period. Required fields cannot be blank. Use zero only where that field and the model allow it. Select Calculate after changing a scenario.
Method and assumptions
Average inventory is (beginning + ending inventory) / 2. Turnover is cost of goods sold divided by positive average inventory; days on hand is period days divided by positive turnover.
Worked example
Zero average inventory gives undefined turnover. With inventory present but zero cost of goods sold, a finite days-on-hand figure is unavailable.
Limitations
Inventory and cost of goods sold must use a consistent valuation and period. Zero denominators are not zero-day inventory cycles.