Glossary › Units and data
Uptime and downtime
The share of time a service is available, and the time it is not.
99.9% (“three nines”) sounds like nothing is missing. It still allows about 44 minutes of downtime in an average month. Ratio turns the percentage into time.
In Ratio
| You type | Ratio shows |
|---|---|
99.9% uptime | 43 min 50 s |