How to Use This Tool
Translate unavailable selling days into missed orders and contribution margin. Teams see zero orders for an unavailable SKU but do not quantify the contribution that replenishment delay put at risk.
Why Stockout Lost Sales needs more than a raw total
Lost traffic is not automatically lost forever, so compare the estimate with backorders, substitutions and delayed purchases. For this page, the useful comparison is estimated lost contribution, not whichever input happens to be largest. The Stockout Lost Sales result answers the decision in the heading and should not be reused as a score for a different workflow.
The exact Stockout Lost Sales formula
Lost contribution equals daily visitors × normal conversion × stockout days × contribution margin per order. The visible fields are Daily product-page visitors, Normal purchase conversion, Days out of stock and Contribution margin per order. For Stockout Lost Sales, read each printed unit before entry and make the values describe one transaction, cohort or reporting window. If those scopes differ, the displayed estimated lost contribution may be arithmetically valid but operationally meaningless.
Interpreting estimated lost contribution
Use the exposure to prioritize expedited replenishment only when its incremental cost is below credible lost contribution. The ten-percent comparison is deliberately narrow: it tests the influence of daily product-page visitors and is neither a forecast nor a confidence interval. Preserve the values used, their dates and the resulting decision so a later reviewer can reproduce why Stockout Lost Sales supported the choice.
What this Stockout Lost Sales model leaves out
Customer substitution, backorders, delayed demand, organic ranking effects and repeat-purchase lifetime value are excluded. That is where Stockout Lost Sales stops being trustworthy. If an excluded factor could reverse estimated lost contribution, extend the model explicitly or use the authoritative account system instead of hiding the factor inside an unexplained adjustment.
Evidence and independent verification
The reference reviewed for Stockout Lost Sales is U.S. SBA — Manage your inventory. U.S. SBA — Manage your inventory supports the named definition or rule but does not supply private values for estimated lost contribution. Before acting on the result, reconcile the worked example with the relevant dashboard, invoice, export or measurement.
Private, reproducible calculation
Stockout Lost Sales runs its arithmetic in the current browser tab and requests no login or API key. That keeps the Stockout Lost Sales inputs away from the site's calculation server, while leaving the user responsible for detecting stale data or a changed platform rule. When an assumption changes, reopen U.S. SBA — Manage your inventory and rerun the saved Stockout Lost Sales scenario.
Sources & assumptions
Tool Spec v2 · verified 2026-08-22. Platform rules and fees can change; the editable inputs remain authoritative for your account.
Official references
- U.S. SBA — Manage your inventory (checked 2026-08-22)
Model assumptions
- Every input covers the same reporting period or cohort.
- Customer substitution, backorders, delayed demand, organic ranking effects and repeat-purchase lifetime value are excluded.
- The calculator uses only the visible fields and does not fetch account data.
