How much downtime does 99.99% uptime allow?
99.99% (four nines) uptime allows 52m 34s of downtime per year. Here is the full budget, by period.
| Per day | 9s |
| Per week | 1m |
| Per month | 4m 19s |
| Per quarter | 12m 58s |
| Per year | 52m 34s |
| Period | Allowed downtime |
|---|---|
| Per day | 9s |
| Per week | 1m |
| Per month | 4m 19s |
| Per quarter | 12m 58s |
| Per year | 52m 34s |
Detection matters as much as the budget. With 5-minute monitoring you can burn minutes of this allowance before you even detect an outage. PingInsight's true 1-second checks catch it almost immediately.
Back to the full uptime calculator or see how 1-second checks help you stay within budget.