Inventory Turnover Calculator
Last updated: July 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. Enter realistic assumptions and compare more than one scenario before making a financial or insurance decision.
Read the complete guide
What this calculator estimates
Calculate inventory turnover and estimated days inventory on hand. It is designed for fast planning and comparison in the United States. The output is an estimate, not a binding quote, tax determination, insurance offer, valuation or professional recommendation.
How to use it
Enter values from your payroll records, insurance quote, budget or financial statements. Keep time periods and rates consistent. Select Calculate, review the headline result and supporting figures, then change one assumption at a time to test another scenario.
How the calculation works
Average inventory is the mean of beginning and ending inventory. Turnover equals cost of goods sold divided by average inventory; days on hand equals period days divided by turnover.
Important limitations
Seasonal businesses and rapidly changing inventory may need monthly averages rather than only beginning and ending balances.
Frequently asked questions
Is the result exact?
No. It is a planning estimate based on the values entered.
Can I compare different scenarios?
Yes. Change one input at a time so you can see which assumption changes the result.
Does the calculator store my inputs?
The calculation runs in the browser and does not require an account. Avoid entering unnecessary confidential information.