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THE FEUTEX TOOLKIT

SLO Error Budget Burn Window

Translate observed error ratio into burn rate and remaining budget time.

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02 Your result
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FormulaBurn rate = e/(100-slo); Time to exhaust remaining budget = hours*left/100*(100-slo)/e

Made for real tasks

  • Translate observed error ratio into burn rate and remaining budget time.
Explore step-by-step workflows →

Worked example

Inputs

Success target
99.9 %
Observed errors
1 %
Window duration
720 hours
Budget remaining
50 %

Expected results

Burn rate
10 times
Time to exhaust remaining budget
36 hours

Load the example in the workspace to reproduce these results. Display rounding does not change the underlying calculation.

How to use this tool

  1. Enter success target, observed errors, window duration, budget remaining in the displayed units.
  2. Calculate the scenario, then compare it with measurements before changing a system.

Try this example

{
  "slo": 99.9,
  "e": 1,
  "hours": 720,
  "left": 50
}

Accuracy and scope

Assumes constant request volume and sustained observed error ratio; not time-based availability.

Is my data uploaded?

This tool runs locally in your browser. Input and output are not sent to a processing server. Copy or download your result before leaving the page.