How to Calculate Uptime

What is Uptime?

An uptime percentage calculator converts between uptime percentage and maximum allowable downtime per year, month, or day. "Five nines" (99.999%) uptime means only 5.26 minutes of downtime per year; "three nines" (99.9%) allows 8.77 hours of annual downtime.

Step-by-Step Guide

1Track total operational time
2Subtract downtime minutes
3Calculate availability percentage

Worked Examples

Input

720 hours in month, 1 hour downtime

Result

99.86% uptime

Typical SLA target

Common Mistakes to Avoid

✕Wrong parameters
✕Missing adjustments

Frequently Asked Questions

What does this calculator do?

Set parameters

How do I use this calculator?

Run calculation

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