Uptime and SLA calculator

Server side

Convert an availability target into the downtime it allows, and downtime back into availability

Input

Availability target (%)

Leave empty to work it out from an allowed downtime instead.

Window

Allowed downtime

Use instead of a percentage to find the availability it implies.

Downtime unit

Actual downtime

Optional. Downtime so far in this window, to check it against the target.

This tool runs on the AdminForge server, which needs to reach the target you enter. Nothing is stored or logged. Do not paste secrets into a server-side tool on an instance you do not control.

Fill in the form and run the tool. Results appear here.

Months and quarters are averages of a 365.25-day year: a month is 30.4375 days and a quarter 91.3125, so twelve months make exactly one year. Durations are rounded down to the second (to a tenth of a second under a minute), so a downtime budget is never overstated. Pure arithmetic: nothing leaves the instance.