SLA downtime calculator
How much downtime an availability target such as 99.9 percent really allows.
Runs in your browser. Nothing you type is sent to the server.
About this tool
Enter an availability target as a percentage. The calculator shows the downtime it allows in a day, a week, a month and a year. It helps when writing or reading an SLA, setting a service target, or explaining to a stakeholder what an extra nine costs.