Reliability Tool
SLA Uptime Calculator
Translate an uptime guarantee into the downtime you are actually allowed, per day, week, month and year.
Three to six nines
•
Per-period downtime
•
Instant, no sign-up
Uptime 99.9%
Downtime 0.1%
Green = uptime • red = allowed downtime
Uptime Percentage
%
Allowed Downtime / Month
43m 49s
- Per Day
- 1m 26s
- Per Week
- 10m 4s
- Per Year
- 8h 45m 56s
ISPbox Platform
Actually hit your SLA.
Monitor devices, track outages and prove uptime to clients. Free to start.
Create free accountUnderstanding SLA Availability
SLA (Service Level Agreement) availability defines the guaranteed percentage of time a service will be operational. Meeting high availability standards (like "Five Nines" or 99.999%) requires redundant systems and rigorous network monitoring.
Common SLA Tiers
- 99.9% ("Three Nines"): Standard for commercial ISP services. Allows ~43 minutes of downtime per month.
- 99.99% ("Four Nines"): Enterprise standard. Allows ~4 minutes of downtime per month.
- 99.999% ("Five Nines"): Carrier/Telco grade. Allows only ~26 seconds of downtime per month.
Featured on:
