How to use the sell-through rate calculator
- Enter the items you sold in the period — units, not dollars.
- Enter the items still unsold at the end of the period: everything listed plus anything waiting to be listed.
- Set the length of the period — 30 days for a month, 90 for a quarter.
- Optionally add your average cost per item to see the money tied up in unsold stock, and a target sell-through rate.
The sell-through rate formula
Sell-through rate = units sold ÷ (units sold + units unsold) × 100
Retail buyers often write the same idea as units sold ÷ units received (or units sold ÷ beginning inventory) for a season. For resellers, "sold plus still unsold" is simpler because new stock arrives all the time: it counts everything you had a chance to sell in the period.
| Sold | Still unsold | Sell-through rate |
|---|---|---|
| 10 | 90 | 10% |
| 24 | 56 | 30% |
| 40 | 60 | 40% |
| 60 | 40 | 60% |
The sell-through rate is the same whether you write it with or without the hyphen — "sell through rate" and "sell-through rate" mean the same thing.
What is a good sell-through rate?
There isn't one number for everyone, but these ranges are a useful guide for a monthly sell-through rate:
| Monthly rate | What it usually means |
|---|---|
| Under 20% | Slow. Stock is building up faster than it sells. |
| 20% – 40% | Steady. Common for a large closet or store with many listings. |
| 40% – 60% | Strong. Stock turns into cash without piling up. |
| 60%+ | Excellent — or a sign you could charge a little more. |
Seasonal fashion retailers often aim for 60% to 80% over a whole season. A reseller with hundreds of one-off listings will usually sit lower than a shop that restocks a few best-sellers, so compare yourself with your own past months first.
Sell-through rate vs days to sell
Sell-through rate tells you how much sells; days to sell tells you how fast. The calculator turns your rate into a pace — items sold per day — and works out how many days the rest of your stock would take to sell at that pace. If the answer is longer than your "dead stock" limit (often 90 days), some of those items need a new price, better photos or another platform.
Money tied up in unsold stock
Unsold items are cash on a shelf. Multiply the items still unsold by your average cost per item and you see what a slow sell-through rate is really costing you — money that can't buy the next haul. For profit per item after fees and shipping, use the profit margin calculator.
Track sell-through rate automatically
Working it out by hand once is easy; tracking it every month per platform and per sourcing spot is where a spreadsheet gets painful. Flip, our reseller profit tracker, shows the sell-through rate for every platform (eBay, Poshmark, Mercari, Depop, Etsy and more) and every thrift store or estate sale you source from, alongside true profit and average days to sell. Its dead-stock alerts flag anything that has waited too long. Read the full guide: how to calculate your true profit as a reseller.
How to improve your sell-through rate
- Price against sold comps, not active listings.
- Refresh old listings — new photos, a better title and keywords.
- Cross-list slow items on another platform.
- Send offers to people who liked or watched an item.
- Bundle slow, low-price items.
- Drop the price on anything older than 60–90 days.
- Source less of what doesn't move — your sell-through rate by category and source shows you what that is.
Save, print or share your result
Under the calculator you can save the calculation in your browser, copy a link that reopens it with your numbers, print a clean report or download it as a PDF (with a QR code that reopens the calculation), or download a CSV. Nothing is uploaded — saved calculations stay on your device.
Frequently asked questions
How do you calculate sell-through rate?
What is a good sell-through rate?
Is sell-through rate the same as inventory turnover?
Should I use units or dollars?
How can I improve my sell-through rate?
Can a sell-through rate be too high?
Can I save, print or download my result?
Written by
Finance Specialist & Editor, VaultlyApps
Emma Whitfield writes and edits the VaultlyApps money guides and free calculators. Her focus is US household finance — budgeting on a real paycheck, paying down credit card and student debt, emergency funds and savings goals, renting — and the money side of freelancing and small-business income, from pricing and profit margins to self-employment tax. Every guide is researched against primary sources such as IRS publications and the CFPB, every number is checked in our tested calculators, and tax content is reviewed each year when new IRS figures come out. Emma is not a licensed financial adviser or tax preparer; her work is general education, not personal advice.
Researched against primary US sources, checked against independent calculators and reviewed by a finance expert on our team. Written for US readers — general education, not financial, tax or legal advice. Editorial policy · Disclaimer
