Rex says
Money math without the spreadsheet headache. Plug in your numbers and I'll show you exactly where the dollars land.
Try a scenario
Click to load — tweak from there.Inputs
Result
Inventory turns per year
5.33
Days of inventory on hand
68
Turns per month
0.44
Psst — share this and help Rex grow
One click, a permanent link with your numbers baked in.
How to use this
- 1Enter annual retail cost of goods sold ($).
- 2Enter average inventory value (at cost) ($).
- 3Read your inventory turns per year on the right — it updates as you type.
- 4Hit Share to keep the scenario or send it to someone.
About this calculator
Inventory turns measure how many times you sell through your average retail stock in a year — a low number means cash is tied up in shelf product that isn't moving, while a very high number can mean you're stocking out and losing sales. This calculator takes your annual cost of goods sold (COGS) for retail and your average inventory value at cost, then computes turns per year and days of inventory on hand. Salon retail typically targets 4-6 turns per year; specialty product lines with slower velocity (styling tools, niche skincare) may run 2-3 turns acceptably, while fast-moving shampoo and conditioner lines should be turning 6-8 times or more.
Worked example
Using the values the calculator loads with:
Inputs
- Annual retail cost of goods sold: 48000 $
- Average inventory value (at cost): 9000 $
Results
- Inventory turns per year: 5.33
- Days of inventory on hand: 68
- Turns per month: 0.44
What each field means
Inputs
- Annual retail cost of goods sold ($)
- The annual retail cost of goods sold used in the calculation, measured in $. Starts at 48000 $ so you have a working example on load.
- Average inventory value (at cost) ($)
- The average inventory value (at cost) used in the calculation, measured in $. Starts at 9000 $ so you have a working example on load.
Results
- Inventory turns per year
- Returned as a decimal number and shown as the headline result. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
- Days of inventory on hand
- Returned as a whole number. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
- Turns per month
- Returned as a decimal number. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
FAQ
What's a good inventory turn rate for salon retail?
4-6 turns per year is standard for general salon retail (shampoo, conditioner, styling product). Below 3 turns means too much cash is sitting on shelves in slow SKUs; above 8-10 turns can mean you're understocking and possibly losing sales to stockouts, especially on best-sellers.
Why does inventory turnover matter if the product eventually sells?
Cash tied up in unsold inventory can't be used for payroll, marketing, or equipment. A bottle sitting on the shelf for six months instead of two also increases risk of damage, expiration, or discontinuation by the manufacturer, and it ties up shelf space that could hold better-performing product.
How do I improve slow turns without discounting everything?
Start by identifying the specific SKUs dragging the average down rather than discounting the whole retail line. Often it's 2-3 products that were overordered or don't fit your clientele; clearing those through a targeted promotion and not reordering them fixes most of the problem without a blanket sale.
Accuracy and limitations
- Results are estimates before tax, fees, and inflation unless an input explicitly covers them.
- Rates are treated as fixed for the whole period — variable-rate products will drift from this projection.
- This is educational maths, not financial advice. Check anything contractual with the lender or your accountant.
Related tools
Retail Attachment Rate Calculator
Measure what share of clients buy retail and what it's worth to you.
Hair Color Cost Per Service Calculator
Find your true product cost per color service and the margin it leaves.
Spa Package Pricing Calculator
Bundle multiple services into a package price with the right discount.
Cite this calculator
Writing about this topic? Grab a citation — every link helps keep these tools free.
RevenueLab. (2026). Salon Product Inventory Turns Calculator. Retrieved from https://www.revenuelab.fyi/toolbox/salon-product-inventory-turns
<p>Source: <a href="https://www.revenuelab.fyi/toolbox/salon-product-inventory-turns" target="_blank" rel="noopener">Salon Product Inventory Turns Calculator — RevenueLab</a> (2026).</p>
Source: [Salon Product Inventory Turns Calculator — RevenueLab](https://www.revenuelab.fyi/toolbox/salon-product-inventory-turns) (2026).