SLA / Error Budget Calculator
Calculate error budgets, allowed downtime, and burn rates from your SLA targets. Compare standard uptime tiers side by side.
Uptime Target
Error Budget
0.1000%
Allowed Downtime (monthly)
43m 48s
Daily Downtime
1m 26s
Burn Rate Analysis (Optional)
SLA Tier Comparison
| SLA Tier | Monthly Downtime | Annual Downtime | Daily Downtime |
|---|---|---|---|
| 99%(Two Nines) | 7h 18m | 3d 15h 36m | 14m 24s |
| 99.5% | 3h 39m | 1d 19h 48m | 7m 12s |
| 99.9%(Three Nines)Selected | 43m 48s | 8h 45m 36s | 1m 26s |
| 99.95% | 21m 54s | 4h 22m 48s | 43s |
| 99.99%(Four Nines) | 4m 23s | 52m 34s | 9s |
| 99.999%(Five Nines) | 26s | 5m 15s | 1s |
How SLA Error Budgets Work
An error budget is the maximum amount of unreliability your service can have before violating its SLA. It is the difference between 100% uptime and your SLA target.
Burn rate measures how fast you are consuming your error budget. A burn rate of 1.0x means you will exhaust your budget exactly at the end of the period. A burn rate of 2.0x means you will exhaust it halfway through.
SRE teams use error budgets to make deployment decisions -- when the budget is healthy, ship faster. When it is depleted, focus on reliability.
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