https://uptime.is/
SLA & Uptime calculator: How much downtime corresponds to 99.9 % uptime
SLA uptime and downtime calculator
sla uptime calculatorhow muchdowntimecorresponds99
https://www.slauptime.com/
SLA Uptime Calculator
It is an SLA uptime calculator to calculate required service uptime or acceptable downtime.
slauptimecalculator