Stockout Rate Calculator

Why It Matters

Every SKU that's out of stock is actively losing potential sales, often to a competitor, but it rarely shows up as a clear line item the way a slow-moving product does. Tracking stockout rate alongside sell-through rate helps distinguish a genuine demand-planning problem from healthy fast-selling inventory.

Example

A catalog has 40 SKUs out of stock out of 500 total SKUs. Stockout Rate is (40 divided by 500) times 100, which equals 8%.

Frequently Asked Questions

• What's a healthy Stockout Rate?

  Many retailers aim to keep it under 5%, though the acceptable level depends on lead times and how quickly a category can be restocked without losing the sale entirely.

• How is Stockout Rate different from Sell-Through Rate?

  Sell-through rate measures how much of what you received has sold, useful even while stock remains. Stockout rate measures how much of your catalog has run out entirely, a stricter and more urgent signal.