Observability & SRE
SLO Error Budget Burndown
Enter your SLO target, window, and observed downtime to compute remaining error budget, current burn rate, and projected exhaustion time. Supports rolling and calendar windows.
No data is transmitted — everything runs locallyTool
About this tool
SLO Error Budget Burndown
The SLO Error Budget Burndown computes remaining error budget, burn rate, and time-to-exhaustion from SLO target, window size, and observed downtime.
• Check whether current downtime has triggered a fast-burn alert threshold
• Project when the error budget will exhaust at the current incident burn rate
• Communicate SLO status to engineering leadership with remaining budget percentage
• Model the impact of a 30-minute incident on a 99.9% monthly SLO
Affiliate disclosure
Uptime, incident, and on-call management. Better Stack provides status pages, incident management, and on-call scheduling for engineering teams.
View SLOs with Better Stack
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FAQ
What does this tool tell you?
The SLO Error Budget Burndown computes remaining error budget, burn rate, and time-to-exhaustion from SLO target, window size, and observed downtime.
What affects the result most?
Error budget remaining = (1 - SLO) × window_seconds - downtime_seconds observed so far. Burn rate at current pace: if 20% of budget consumed in 5% of window, burn rate = 4×. Time to exhaustion: at current burn rate, when does the error budget reach 0?.
How should I use the result?
The calculation is deterministic — the same inputs always produce the same output — so the most useful workflow is to vary one input at a time and see which factor moves the result most. That tells you where to focus your attention before committing to a decision.