Disaster Downtime Calculator
What would a disaster cost you?
According to The Gartner Group:

Fill in the following fields and press the “Calculate” button.
Organization’s Annual Revenue:
Organization’s Estimated Productivity Loss: (during a complete network outage)
(%)
Work Hours Per Year (one, two, or three daily shifts)
Sample One Time Event Duration (in business hours)
Results:
Single Event Cost of Unplanned Downtime
Hourly Cost of Downtime