Landed cost
Bring product, freight, duty, and fees into one number.
Costs & conversionCOSTS & CONVERSION
Stockout Cost & Lost Contribution Calculator
Model the contribution lost from unfilled demand, with an explicit lost-sales assumption and separately entered recovery costs.
Stockout cost calculator
Model the contribution lost from unfilled demand, with an explicit lost-sales assumption and separately entered recovery costs.
YOUR RESULT LIVE CALCULATION
Estimated stockout impact
$2,120/ incident
SCENARIO, NOT A FORECASTLost contributionAdditional costs
- Assumed permanently lost units
- 90
- Assumed deferred/recovered units
- 30
- Lost contribution
- $1,620
- Additional incident costs
- $500
Unfilled demand is not automatically lost sales. Only the entered lost-sales share contributes to lost margin.
BEHIND THE NUMBER
How the calculation works
Contribution per unit is the selling price less the variable costs avoided when that sale is not made. Enter the share of unmet demand you expect to lose permanently; the rest is treated as deferred or recovered and has no lost contribution in this simplified model. Additional costs can include incremental expediting, penalties, or other incident costs not already counted. Fractional lost units represent a scenario expectation, not an observed count.
Lost units = unfilled demand × lost-sales share / 100; impact = lost units × unit contribution + additional incident costs
When this calculation helps
Separate demand permanently lost from demand deferred into a later period. The contribution on a lost unit excludes variable costs avoided when that sale is not made.
Check the interpretation
Adding full lost revenue to lost contribution counts the same economic effect twice. Record expediting and penalties separately and avoid repeating them in another field. The lost-sales share is your scenario assumption, not a forecast of customer behavior.
This is an entered-assumption scenario, not a prediction of customer behavior. It excludes unentered downtime, future customer loss, and deferred-order margin changes. Do not add full lost revenue on top of lost contribution or double-count recovery costs.
Good to know
Why use contribution instead of sales revenue?
A lost sale can also avoid variable costs. Using contribution separates the lost economic contribution from gross revenue and avoids treating avoided costs as losses.
What happens to backorders?
The portion not marked permanently lost is treated as deferred or recovered without lost contribution. Add only separately identified incremental costs to the additional-cost field. Actual recovery rates must come from your own evidence.