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The QFINHUB inventory turnover calculator tells you how many times per year you sell through your average inventory. I built it because most small retail operators I've talked to confuse turnover with margin. Two different problems. A grocery store turns inventory 14 times a year at 2% margin. A jewelry store turns it once at 50% margin. Both can be profitable. The number without context is meaningless.
Inventory turnover is a ratio showing how many times a company's inventory is sold and replaced over a period, calculated as cost of goods sold divided by average inventory.
Inventory turnover = COGS / average inventory. Always use COGS, not revenue.
Days inventory outstanding (365 / turnover) is often easier to interpret than the raw ratio.
Industry benchmarks vary wildly: grocery at 12 to 14, apparel at 4 to 8, jewelry at 1 to 2 per CSCMP.
Declining turnover over four quarters is an early warning of deadstock and markdown risk.
Inventory Turnover = Cost of Goods Sold / Average Inventory
COGS divided by average inventory over the same period. Higher numbers mean faster movement. Average inventory is usually (beginning + ending) / 2.
I worked with a mid-size apparel retailer in 2024. Their COGS was $4.2M and average inventory was $720K. Turnover: 5.83. Days inventory outstanding: 365 / 5.83 = 62.6 days. That means on average, a shirt sat on the rack for 63 days before selling. Industry benchmarks for apparel range from 4 to 8 turns per year per CSCMP data, so they were middle of the pack but had room to improve to 7+, and the path there was mostly cutting the bottom 20% of SKUs that hadn't turned in 180 days.
Your boutique sold $850,000 in goods last year at a COGS of $510,000. Your beginning inventory was $95,000 and ending was $75,000, so average inventory is $85,000. Turnover = $510,000 / $85,000 = 6.0. That means you sold through your entire inventory six times. Days inventory outstanding = 60.8 days. Compare that to your category average (4 to 8 for apparel) and you've got healthy movement.
These authoritative sources inform our calculator methodology and ensure accuracy.
Written by Qasem Mohammed
Financial tools developer and founder of QFINHUB. All calculators are built with industry-standard formulas and reviewed for accuracy. Content is for educational purposes only — always consult a qualified financial professional for decisions about your specific situation.
Last updated: August 10, 2026 ·About QFINHUB · Editorial Policy
Last reviewed by Qasem Mohammed — August 10, 2026
AI & Software Engineer, Founder & Lead Developer at QFINHUB · Editorial Policy
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Average Inventory
$225,000.00
Turnover Ratio (365 days)
5.33
Times inventory sold in the period
Days in Inventory
68.4
Average days to sell inventory
Annualized Turnover
5.33
Projected annual rate