Free Tool
Downtime Cost Calculator
Calculate how much website or app downtime costs your business per hour, month, and year.
How to use the Downtime Cost Calculator
- Enter monthly revenue. Input your business's average monthly revenue in USD.
- Enter downtime hours. Enter the number of hours of downtime you want to estimate the cost for.
- View your results. Instantly see your hourly downtime cost, monthly loss estimate, and annual projection.
- Email the report. Optionally enter your email to receive a full cost breakdown report.
How this calculator works
Formula
- Hourly cost = monthly revenue ÷ 730
- Incident cost = hourly cost × downtime hours
- Annual risk = incident cost × 12
Inputs
| Input | Unit | Default |
|---|---|---|
| Monthly Revenue ($) | USD/month | empty (placeholder "e.g. 50000") |
| Downtime Duration (hours) | hours | empty (placeholder "e.g. 2") |
Outputs
- Hourly Cost:
- Monthly revenue ÷ 730
- This Incident:
- Hourly cost × downtime hours (returned by the API as "monthlyLoss")
- Annual Risk:
- This-incident cost × 12
Assumptions
- 730 hours per month (365 days × 24 hours ÷ 12)
- All revenue is assumed to be lost evenly per hour of downtime
- Annual risk assumes the same incident recurs once every month (×12)
- Results are rounded to whole US dollars
Worked example
Inputs: $50,000/month revenue, 2 hours downtime
Result: Hourly Cost $68; This Incident $137; Annual Risk $1,644
Results are estimates from the inputs you provide and the assumptions above, not financial advice.