Sell-Through Rate Calculator
What share of received stock has sold.
Results update as you type.
How it works
Sell-through rate is the percentage of received inventory that you have sold over a given period, and it is one of the sharpest measures of how well a product is performing against the stock you committed to it. You calculate it by dividing units sold by units received and multiplying by 100. Unlike raw sales counts, sell-through rate puts sales in the context of how much you brought in, so it tells you whether a product is flying off the shelves or gathering dust. A high sell-through rate signals strong demand and efficient buying, suggesting you could stock more and perhaps raise prices, while a low rate warns that stock is moving too slowly, tying up cash and risking markdowns or obsolescence. Retailers typically measure sell-through over a fixed window, often thirty days, to compare products on equal footing and to judge how quickly a new arrival is being adopted. Store owners and buyers use this calculator to evaluate purchasing decisions, to decide which products to reorder and which to discount or discontinue, to negotiate with suppliers, and to plan markdowns before slow stock becomes dead stock. Track sell-through by product and by season, compare it against your targets, and use it alongside days of supply and margin to build a catalogue that turns inventory into cash quickly. Watching this number closely is what separates disciplined buying from the slow accumulation of stock that never sells.
sell-through rate = (units sold ÷ units received) × 100
The formula divides the number of units sold by the number of units received during the same period, then multiplies by 100 to give a percentage. The denominator is the stock you took in rather than what remains, which is what makes the metric a measure of performance against commitment: it answers what share of everything you brought in has actually sold. Keeping the sold and received counts to the same window and product is essential for a meaningful figure.
Source:Standard retail inventory metric (sell-through rate)
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Worked example
How to use this calculator
- 1
Enter your values
Enter units sold and units received.
- 2
Adjust the options
Fine-tune any options to match your situation.
- 3
Read your result
Sell-through rate updates instantly as you type — no button to press.
Frequently asked questions
What is a good sell-through rate?
A common benchmark is a sell-through rate around eighty percent over a thirty-day period, though the right target varies by industry, price point and product type. Higher rates indicate strong demand and efficient buying, while much lower rates suggest you ordered too much or priced too high. Rather than fixate on a single number, compare each product against your own targets and against similar items, and watch the trend so you can act before slow stock turns into dead stock.
What period should I measure sell-through over?
Thirty days is the most common window because it gives enough time for a product to establish a sales pattern while remaining current. For fast-moving goods a shorter window can be useful, and for big seasonal ranges you might measure across the whole season. The key is consistency: use the same period whenever you compare products or track a product over time, otherwise differences in the measurement window will distort the comparison and lead you to the wrong conclusions.
How is sell-through different from inventory turnover?
Sell-through rate compares units sold against units received in a single period, usually expressed as a percentage, making it ideal for evaluating a specific buy or a new product launch. Inventory turnover measures how many times your entire stock is sold and replaced over a longer period such as a year. Sell-through is more granular and buying-focused, while turnover is a broader efficiency ratio, and many retailers use both together to manage purchasing and overall inventory health.
What should I do about a low sell-through rate?
A low rate means stock is moving slowly, so investigate why before it becomes dead stock. Consider whether the price is too high, the product is poorly merchandised, or demand was simply overestimated. Options include running a promotion or markdown to accelerate sales, improving product photos and descriptions, bundling with popular items, or discontinuing the product and ordering less next time. Acting early, while the stock still has value, protects your cash and your margins far more than waiting.
Can sell-through rate guide reorder decisions?
Absolutely. A high sell-through rate is a strong signal to reorder, and possibly to increase the order size, because demand is outpacing supply. A low rate suggests holding off or reducing the next order. Pairing sell-through with days of supply gives an even clearer picture, showing both how fast a product sells relative to what you bought and how long your remaining stock will last, which together make reorder decisions far more confident and data-driven.