Burn-Rate Alert Calculator
Compute multi-window, multi-burn-rate alert thresholds (the Google SRE workbook pattern) from an SLO.
Runs 100% in your browser. Nothing you enter is uploaded or stored.
| Long / short window | Burn rate | Budget consumed over window | Action | Time to exhaust |
|---|---|---|---|---|
| 1h / 5m | 14.4x | 2.00% | Page (Fast burn) | 1d 21h |
| 6h / 30m | 6x | 5.00% | Page (Fast burn) | 4d 12h |
| 1d / 2h | 3x | 10.00% | Ticket (Slow burn) | 9d |
| 3d / 6h | 1x | 10.00% | Ticket (Slow burn) | 27d |
Time-to-exhaust assumes the listed sustained burn rate against your remaining 90.0% of budget.
# Multi-window, multi-burn-rate alert (SLO = 99.9%, error budget = 0.100% bad) # Fast burn -> PAGE ( job:slo_errors_ratio:rate1h > (14.4 * 0.00100) and job:slo_errors_ratio:rate5m > (14.4 * 0.00100) ) or ( job:slo_errors_ratio:rate6h > (6 * 0.00100) and job:slo_errors_ratio:rate30m > (6 * 0.00100) ) # Slow burn -> TICKET or ( job:slo_errors_ratio:rate1d > (3 * 0.00100) and job:slo_errors_ratio:rate2h > (3 * 0.00100) ) or ( job:slo_errors_ratio:rate3d > (1 * 0.00100) and job:slo_errors_ratio:rate6h > (1 * 0.00100) )
Related tools
SLA Uptime Calculator
Turn an SLA target like 99.9% into the exact downtime you're allowed per day, week, month, and year.
Error Budget Calculator
See how much error budget an SLO gives you, how much you've burned, and how much is left.
Composite SLA Calculator
Calculate end-to-end availability across serial and parallel service dependencies.
Downtime Cost Calculator
Estimate the business cost of an outage from revenue, engineers engaged, and duration.
Apdex Score Calculator
Compute an Apdex score from satisfied, tolerating, and frustrated request counts.
SLO Downtime Table
Generate the classic 'nines' allowed-downtime table for any custom SLO target and window.
From the makers of these tools
Run production tasks with agents you can trust.
BitSentry turns recurring investigations into reusable runbooks your agents follow step by step, with AI-explained evidence and a full audit trail.
Try BitSentry Desktop Free