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Inventory Turnover Calculator

Calculate your inventory turnover ratio, Days Sales of Inventory (DSI), carrying costs, and ABC classification. Compare against 20 industry benchmarks instantly.

20 industry benchmarksABC analysis built-inMulti-period trend view

Inputs

Benchmark: 6–8x (typical 7x)

$
$

(Beginning inventory + Ending inventory) ÷ 2

Results

Inventory Turnover
6.00x
per year
Days Sales of Inventory
61
days to sell inventory
Industry Benchmark
7x
6–8x range
Carrying Cost (est.)
$100.0K
25% of avg inventory
Moderate Stockout Risk

Near benchmark. Monitor seasonal demand closely.

You vs. Electronics Benchmark

Inventory Turnover: The Complete Operations Guide

Why Inventory Turnover Matters

Inventory turnover is one of the most important operational efficiency metrics. Every dollar sitting in unsold inventory is a dollar that is not generating revenue — and is actively costing you money through carrying costs that typically run 20–30% of inventory value annually. A company with $1M in average inventory and a 5x turnover ratio spends roughly $200,000–$300,000 per year just to hold that stock.

High turnover ratios indicate lean, efficient operations. Low turnover signals excess purchasing, slow-moving products, or inaccurate demand forecasting. Both extremes have costs: too-high turnover increases stockout risk, while too-low turnover wastes capital and warehouse space.

Industry Benchmarks Explained

Grocery and food retailers achieve the highest turnover (14–20x) because of perishability and thin margins requiring high volume. Fashion retailers target 4–6x to balance trend cycles with replenishment lead times. Electronics companies (6–8x) balance frequent product updates with supplier lead times. Luxury goods (1–3x) deliberately maintain scarcity.

Use benchmarks as a directional guide rather than an absolute target. A well-run specialty retailer below benchmark is often more profitable than a poorly managed competitor hitting benchmark through unsustainable discounting.

ABC Analysis: Focus Where It Counts

The ABC classification method (derived from the Pareto principle) recognizes that not all inventory deserves equal management attention. A items typically represent 10–20% of your SKUs but account for 70% of total inventory value. These need daily monitoring, tight reorder triggers, and strong supplier relationships. Stockouts in A items directly impact revenue.

C items, while numerous, contribute little to overall value. Dedicating the same management energy to C items as A items is a common operational mistake. Automation through ERP systems like Odoo allows you to set-and-forget reorder rules for C items while focusing human attention on A category exceptions and supplier negotiations.

Frequently Asked Questions

What is a good inventory turnover ratio?
A "good" ratio depends on your industry. Grocery and food companies typically achieve 14–20x annually, while luxury goods may turn inventory only 1–3x per year. A healthy ratio for most retail and manufacturing businesses falls between 5–10x. Compare your ratio to your industry benchmark — the key is trending upward over time, not hitting a universal number.
How is inventory turnover ratio calculated?
Inventory Turnover = Cost of Goods Sold (COGS) ÷ Average Inventory Value. Average inventory = (Beginning Inventory + Ending Inventory) ÷ 2. Use COGS rather than revenue for accuracy, as revenue includes markup. For example, if your annual COGS is $2.4M and average inventory is $400K, your turnover is 6x.
What is Days Sales of Inventory (DSI)?
DSI measures how many days it takes to sell through your current inventory. DSI = 365 ÷ Inventory Turnover Ratio. A DSI of 60 means it takes 60 days on average to sell through your stock. Lower DSI indicates faster-moving inventory. For perishable goods, DSI should be very low (under 7 days); for industrial equipment, DSI of 90+ is common.
What is ABC inventory analysis?
ABC analysis classifies products by their contribution to total revenue value. A items (top 70% of value, typically 10–20% of SKUs) need tight daily control. B items (70–90% of value, 30% of SKUs) need moderate management. C items (bottom 10% of value, 50%+ of SKUs) can be managed with minimal oversight. This focuses resources where they have the most impact.
What is inventory carrying cost and how is it calculated?
Carrying cost (holding cost) is the total annual cost of storing unsold inventory. It typically equals 20–30% of average inventory value and includes: capital cost (8%), storage and warehouse space (5%), insurance and taxes (3%), obsolescence and shrinkage (5%), and handling and administration (4%). High carrying costs make a strong case for improving turnover ratio.
How can I improve my inventory turnover ratio?
Six proven strategies: (1) Implement demand forecasting to align purchasing with actual sales trends. (2) Adopt ABC analysis to prioritize high-value items. (3) Set up automated reorder points to prevent over-ordering. (4) Negotiate shorter supplier lead times to reduce safety stock needs. (5) Run promotions to clear slow-moving C-category inventory. (6) Use an ERP like Odoo to gain real-time inventory visibility and automate replenishment.

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Automate Inventory Management with Odoo

Odoo Inventory gives you real-time turnover visibility, automated ABC classification, and smart reorder rules — out of the box. ECOSIRE helps you implement it in 4–8 weeks.

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