Business
Inventory turnover
Calculate cost-based inventory turnover, average inventory, and estimated days inventory outstanding.
Calculators / Business / Days inventory outstanding
Days inventory outstanding calculator
Translate inventory levels into estimated days of sales coverage.
On this page
Days inventory outstanding90days
Calculator controls
How to calculate
Translate inventory levels into estimated days of sales coverage.
Days inventory outstanding = inventory/cogs*days
Worked example
Average inventory at cost: 30000; Cost of goods sold: 120000; Days in period: 360.
Days inventory outstanding: 90 days.
Assumptions and limits
No. It is an aggregate ratio, not an ageing report of individual inventory items.
Results are rounded for display; calculations use unrounded values. Read our calculation methodology.
Understanding the result
This estimates the number of days represented by average inventory at the period’s cost-of-sales pace.
When this tool is useful
Translate inventory levels into estimated days of sales coverage.
Understanding your inputs
| Input | What to enter |
|---|---|
| Average inventory at cost | Enter a number of at least 0 and no more than 1000000000000. |
| Cost of goods sold | Enter a number of at least 0.01 and no more than 1000000000000. |
| Days in period | Enter a number of at least 1 and no more than 3660. |
Frequently asked questions
Is this an exact age of the stock?
No. It is an aggregate ratio, not an ageing report of individual inventory items.