Downtime cost calculator
Estimate lost revenue from your hourly revenue, downtime and affected percentage. The result uses your currency and assumptions; it is not an observed financial loss. The main result is revenue at risk under your assumptions. Compare it with full-operation revenue and shorter or longer outages; it does not represent lost profit.
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How it works
Formula
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Your result
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Sources
- emonster.io — original downtime cost methodSources reviewed: 2026-11-06
Assumptions and limitations
This is a scenario estimate, not observed loss or a financial forecast. Hourly revenue is 0–10¹², duration 0–525,600 minutes, affected percentage 0–100. Recovery costs, margin, seasonality and deferred purchases are excluded.
How to use this tool
Set up the inputs
Choose the currency used for your hourly revenue. Enter the outage duration and its unit, then the affected share of revenue. Compare the estimate with the duration table.
Understand the result
The main result is revenue at risk under your assumptions. Compare it with full-operation revenue and shorter or longer outages; it does not represent lost profit.
Worked examples
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Estimate revenue affected by an hour of downtime
1,000 USD/h × 60 min / 60 × 100 / 100 = 1,000 USD.
Frequently asked questions
What are the limits of this tool?
This is a scenario estimate, not observed loss or a financial forecast. Hourly revenue is 0–10¹², duration 0–525,600 minutes, affected percentage 0–100. Recovery costs, margin, seasonality and deferred purchases are excluded.
How does the calculation work?
Estimated revenue = hourly revenue × minutes/60 × affected percentage/100. No currency conversion is applied.
Processing and privacy
The calculation or transformation runs in your browser. The tool does not send its input values or generated output to an application server. Loading a page still makes infrastructure requests; optional analytics and Google consent messages have separate controls.
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Help and feedback
Consult the linked sources for definitions and reference data. Contact Support if you have a question or notice a problem.
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