Sell-through rate measures the share of available inventory sold during a defined period. It helps retailers and brands assess demand and inventory productivity.
How is sell-through rate calculated?
A common formula is units sold ÷ units available for sale × 100. The business must define whether available units mean beginning inventory only or beginning inventory plus receipts during the period.
Illustrative sell-through calculation
| Input | Units | Treatment |
|---|---|---|
| Beginning inventory | 800 | Add to available |
| Receipts | 200 | Add to available |
| Units sold | 600 | Numerator |
| Sell-through rate | 60% | 600 ÷ 1,000 × 100 |
Returns, transfers and damaged units should be handled consistently between periods.
Sell-through vs. inventory turnover
Sell-through compares sales with inventory available over a period, often at SKU or season level. Inventory turnover relates cost of goods sold to average inventory over a longer period.
How should the rate be interpreted?
A low rate may indicate weak demand, excess buying or poor availability at the right channel. A very high rate can signal success or lost sales from understocking.
What should be compared?
Use consistent periods and denominators, then segment by product, location, channel and launch date. Compare margin and markdowns alongside volume.
