Enter how long you were down and get the uptime percentage it produces, for whichever period you report on.
This is the inverse of an SLA calculation. You know the outage length; you want the percentage, usually because someone is asking whether you breached. Enter the duration and the period, and the answer updates as you type.
A note on periods, because it changes the answer: the same 45-minute outage is a 99.9% month and a 96.9% day. Report against the period your SLA names, not the one that reads best.
| Uptime | Per day | Per week | Per month | Per quarter | Per year |
|---|---|---|---|---|---|
| 90%one nine | 2h 24m | 16h 48m | 3d | 9d | 36d 12h |
| 95% | 1h 12m | 8h 24m | 1d 12h | 4d 12h | 18d 6h |
| 99%two nines | 14m 24s | 1h 40m | 7h 12m | 21h 36m | 3d 15h |
| 99.5% | 7m 12s | 50m 24s | 3h 36m | 10h 48m | 1d 19h |
| 99.9%three nines | 1m 26s | 10m 5s | 43m 12s | 2h 9m | 8h 45m |
| 99.95% | 43s | 5m 2s | 21m 36s | 1h 4m | 4h 22m |
| 99.99%four nines | 9s | 1m | 4m 19s | 12m 58s | 52m 34s |
| 99.999%five nines | 1s | 6s | 26s | 1m 18s | 5m 15s |
Every common service level, and the downtime each one allows per month.
Calculators: Uptime calculator · SLA calculator · Downtime calculator · Availability calculator · Downtime cost calculator
Uptime, cron, synthetic, logs, RUM, incidents, and status pages. Free tier on every product.