Examples
Examples
Try the starting example
- SLO target (%)
- 99.9
- Good events
- 9900
- Total events
- 10000
- Observation window (minutes)
- 60
- Full budget period (minutes)
- 43200
- Observed error rate (%)
- 1
- Error-budget burn rate
- 10
- Full-period budget consumed at uniform traffic (%)
- 1.388889
- Hours to spend one full budget at this burn rate
- 72
Try another scenario
- SLO target (%)
- 99.9
- Good events
- 10000
- Total events
- 10000
- Observation window (minutes)
- 60
- Full budget period (minutes)
- 43200
- Observed error rate (%)
- 0
- Error-budget burn rate
- 0
- Full-period budget consumed at uniform traffic (%)
- 0
- Hours to spend one full budget at this burn rate
- No exhaustion at zero errors
Calculation method
Calculation method
Observed error rate (%)
(Total events − good events) / total events × 100.
Error-budget burn rate
Observed error fraction / (1 − SLO fraction).
Full-period budget consumed at uniform traffic (%)
Burn rate × observation duration / full budget duration × 100, assuming uniform event rate across the period.
Hours to spend one full budget at this burn rate
Full-period duration / burn rate / 60, or No exhaustion at zero errors.
Symbols and units
- a
- SLO target (%)
- b
- Good events
- c
- Total events
- d
- Observation window (minutes)
- e
- Full budget period (minutes)
Use the units shown. A list keeps the order in which you enter its values. The symbol ^ means “raised to the power of”.
Assumptions & limits
Assumptions & limits
- Event-based SLO arithmetic, with time extrapolation explicitly assuming uniform event volume. The consumed share can exceed 100%. Remaining real budget requires the complete period’s event counts, not this one observation.
Are these inputs private?
These calculations run in your browser. A shared link contains the values you choose to share. Only questions submitted to the separate AI finder are sent to OpenAI.
Further reading
Google SRE Workbook: burn-rate alerting ↗
Background reading; this does not imply endorsement or independent review of SumFizz.