Finance / CALCULATOR

Days Inventory Outstanding

Days Inventory Outstanding: a supplied-input model with explicit assumptions and a worked example.

Runs on your deviceUpdates as you typeFormula & example ↓
01

Your inputs

Adjust the values to explore a different result.

Enter average inventory.
Enter period cost of goods sold.
Enter days in period.

Formula

DIO=average inventory/COGS × period days.
  • Use the units shown beside each field.
  • Results update automatically whenever you change an input.
  • Displayed values use up to four decimal places, or scientific notation for very small or large numbers. Calculations use standard floating-point arithmetic; exact integer and fraction tools identify their own precision rules.
  • Inventory and COGS must use compatible valuation and period coverage.

Example Calculation

Example inputs
  • Average inventory: 100
  • Period cost of goods sold: 1000
  • Days in period: 365

Average inventory = 100; Period cost of goods sold = 1000; Days in period = 365. The primary result is 36.5.

Frequently asked questions

How do I use this calculator?

Enter average inventory, period cost of goods sold, days in period. The result updates automatically. Use Reset to restore the example values.

What method does it use?

DIO=average inventory/COGS × period days.. Inventory and COGS must use compatible valuation and period coverage.

Why might a rounded result differ?

The calculation keeps full numeric precision internally, then rounds the displayed result. Rounding intermediate steps by hand can produce a slightly different answer.

Are my inputs saved online?

No. This calculator processes your inputs in your browser. A recently used list stores only calculator names on this device, not your entered values.

Check the assumptions and units before using this result. Read about calculation methods.