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Sell-Through Rate Calculator
Calculate the percentage of available inventory sold during a period. Compare product demand before deciding what to restock or discount.
What does this calculator measure?
Sell-through rate measures the share of stock available during a period that was sold in that period. This calculator uses opening stock plus receipts as available stock, so existing inventory is included.
Enter your figures
Use one consistent period. Calculations run locally in your browser.
Stock available at the start of your selected period.
Stock added during the same period; enter 0 if none.
Net units sold during that period, after customer returns.
Your result
Fill in all fields or load the worked example to see your result.
Put your figures to work
Keep product quantities and sales together so your next stock review starts from recorded activity.
Start managing inventoryFormula and worked example
Sell-through rate (%) = Units sold ÷ (Opening stock + Units received) × 100
With 200 opening units, 100 received units and 180 sold units, sell-through is 180 ÷ 300 × 100 = 60%. There are 120 unsold units before other stock adjustments.
How to use the calculator
- Choose the product, category or business and the period you want to review.
- Enter the figures described beside each field using consistent units.
- Review the result alongside the assumptions below before changing purchasing or stock plans.
How to interpret your result
Compare the same product over equal periods, or products with similar seasons and replenishment cycles. A high rate can signal strong demand or insufficient buying; a low rate can signal slow demand or a recent delivery. There is no universal good percentage. Some retailers use units received alone as the denominator; compare only like-for-like definitions.
Explore the inventory workflow in My Inventory ItemsFrequently asked questions
Is sell-through the same as inventory turnover?
No. Sell-through compares units sold with available units for a chosen period. Inventory turnover typically divides cost of goods sold by average inventory value and reports a number of turns.
What period should I use?
Use a week, month or selling season that matches your buying decisions. All inputs must cover the same period. Compare equal periods and account for seasonal changes.
How do returns and damaged stock affect the result?
Use net sales after returns. This simple calculation does not model supplier returns, damage or transfers separately; reconcile those movements before interpreting remaining units.