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Amazon FBA Stockout Cost Calculator

Find out exactly how much stockouts are costing you — and when your next one hits. Enter your numbers below for an instant estimate.

Your FBA Numbers

units/day
Average number of units sold per day on Amazon FBA
$
Net profit after COGS, FBA fees, and advertising
units
Total FBA-inbound + FBA-available units right now
days
Days from placing a PO to inventory arriving at FBA
days
Actual days your listing was inactive / suppressed last month

Your Results

Fill in your numbers to see
your stockout costs

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How the numbers are calculated

Lost Profit
Days out of stock × Daily units × Profit per unit
Based on last month's actual stockout days
Days Until Stockout
Current stock ÷ Daily units sold
Assumes current sell rate continues
Reorder Point
(Lead time + 7) × Daily units
Adds a 7-day safety buffer to your restock lead time