Sell Through Rate Calculator - Retail Inventory Performance

The sell-through rate calculator measures how much of a receipt or opening inventory actually sold. Merchants, brand sellers, and marketplace operators use it to decide whether to reorder, markdown, or kill a SKU. The canonical retail formula is units sold divided by units received (or units available at the start of the period), times 100. An 80% sell-through on a fashion drop means four-fifths of the units moved; a 40% sell-through on the same calendar often means the buy was too deep or the price was wrong. Unlike inventory turnover, sell-through is not annualized and does not require average inventory or cost of goods. That is why this page uses only units received and units sold. Turnover answers “how many times did we cycle the stockroom this year?”; sell-through answers “what share of this receipt sold in this window?” Both are useful, but mixing them produces nonsense. Keep the period consistent: a week’s sell-through cannot be compared with a season’s sell-through unless you say so. Fashion, toys, and consumer electronics live and die by sell-through in the first two to four weeks. Grocery and replenishment basics can run high sell-through every week by design. A 90% rate looks healthy until you realize you stocked out on size medium and left demand on the table. A 60% rate can be fine for a luxury item that is supposed to feel scarce. Always read the percentage next to remaining size curves, weeks of supply, and gross margin. Returns, cancellations, and damaged units can distort the numerator if you count gross shipments as sold. Count net sales when you can. Units received should exclude inbound freight that has not been made available to sell. The sell-through rate calculator is a planning percentage, not an accounting close, and it does not replace a WMS or retail-math pack from your ERP.