SLA Calculator
Set an availability commitment to see how much downtime its reporting window permits. This gives you an outage budget before you have incident measurements.
Allowed downtime
43m 12s
- Reporting period
- 30 days (2,592,000 seconds)
- Target availability
- 99.9%
- Allowed outage
- 43m 12s
What another nine changes
For a fixed window, moving from 99.9% to 99.99% cuts the permitted outage to one tenth of its former length. Over 30 days, those targets allow 43m 12s and 4m 19.2s respectively. At 99.999%, the allowance falls to 25.92 seconds.
The calculation takes the duration in seconds and multiplies it by the unavailable fraction. A target of 100% leaves zero outage allowance. The common-target buttons make these differences visible without requiring you to retype each percentage.
Choose the contract’s reporting window
This tool defines its month as 30 days and its year as 365. Select custom days for a 31-day month, a 366-day year, or another measurement interval. Weekly and daily budgets are useful for planning, but they do not replace a contract that is assessed monthly.
Check how your agreement treats scheduled maintenance and partial failures. Some providers measure successful requests rather than minutes of service availability. The allowance here follows elapsed time only and does not calculate credits or penalties. After an incident, use the separate uptime tool to evaluate recorded downtime against your target.