Sell-Through Rate
Sell-through rate is the percentage of a defined inventory quantity that sells within a stated period.
What is Sell-Through Rate?
Sell-through describes how much of an inventory population has converted into sales. A launch or receipt-cohort measure follows a specific batch; a period measure may compare units sold with opening units plus receipts. Define the stock population before calculating.
The metric uses units rather than revenue when evaluating physical merchandise movement. It differs from inventory turnover, which compares cost flow with average inventory and is expressed as a multiple.
Receipt-cohort sell-through (%) = Units sold from the cohort ÷ Units received in the cohort × 100
For a period-availability version, a common denominator is opening units plus receipts. State treatment of returns, transfers and damaged units; do not combine different versions silently.
A limited seasonal collection
A store receives 800 scarves for a seasonal launch and sells 520 from that batch within six weeks. Receipt-cohort sell-through is 65%, leaving 280 units before returns or other adjustments. A later delivery belongs to a new receipt population unless the measurement is explicitly expanded.
How to interpret it
The percentage needs a time window. Selling 65% in six weeks and selling 65% in six months describe different demand patterns. A launch with a short selling season may need a different interpretation from a year-round basic product.
High sell-through can indicate strong demand, but it may also reflect a very small initial buy. The ratio alone cannot distinguish a successful demand forecast from an understocked launch that lost sales.
Low sell-through can point to weak demand, poor visibility or excess receipts. It can also be normal early in a planned seasonal build. Consider where the product is in its intended selling cycle.
Different sizes or colors can move at very different rates even when the collection’s total looks healthy. A weighted total based on units can hide scarce popular variants alongside unsold less-popular ones.
Common mistakes
Dividing by closing inventory
Closing stock excludes units already sold and produces a different relationship. Name the original or available population.
Comparing cohorts with unequal exposure time
A delivery received yesterday has had less opportunity to sell than one received six weeks ago. Match the age of the receipt cohort.