Inventory Turnover Calculator

Enter your cost of goods sold and inventory values to calculate your turnover ratio, days inventory outstanding, and see how you compare to industry benchmarks for your distribution category.

Total COGS for the most recent 12-month period Inventory value at the start of the period Inventory value at the end of the period

Your Results

Average Inventory
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Turnover Ratio
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turns/year
Days Inventory Outstanding
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days
Industry Benchmark
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turns/year

Industry Benchmarks by Distribution Category

These ranges reflect typical inventory turnover for healthy operations in each distribution segment. Use them as a reference point, not an absolute target. Your ideal turnover depends on your product mix, supplier lead times, and customer service requirements.

Category Healthy Range Typical Days
Food & Beverage12 – 24 turns15 – 30 days
Bakery20 – 50 turns7 – 18 days
Hardware & Tools4 – 8 turns45 – 90 days
HVAC & Plumbing4 – 6 turns60 – 90 days
Auto Parts4 – 8 turns45 – 90 days
Industrial & Safety4 – 6 turns60 – 90 days
Paper & Packaging6 – 12 turns30 – 60 days
Janitorial6 – 10 turns36 – 60 days
General/Other4 – 12 turns30 – 90 days

How inventory turnover works

Inventory turnover measures how many times a distributor sells and replaces its inventory during a given period, usually one year. It is one of the most direct indicators of operational efficiency in distribution.

The formula is straightforward:

Inventory Turnover Ratio = Cost of Goods Sold / Average Inventory

Average inventory is calculated as (Beginning Inventory + Ending Inventory) / 2. Days inventory outstanding is the inverse: 365 / Turnover Ratio, which tells you how many days, on average, your inventory sits before it is sold.

A higher turnover ratio generally means your capital is not tied up in slow-moving stock. A lower ratio can signal overstocking, dead inventory, or weak demand. However, turnover that is too high may indicate that you are understocking and risking stockouts, which costs you orders and customer trust.

How to improve your inventory turnover

For a deeper walkthrough of the formula, worked examples, and strategies specific to wholesale distributors, read the full guide: How to Calculate Inventory Turnover for Distributors.

See turnover reporting with your real data

Ask the Ledger calculates inventory turnover automatically from your live data, broken down by product line, vendor, category, and warehouse. No spreadsheet required.

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