Question 1

What does the error budget calculator show?

Accepted Answer

Enter an SLO target as a percentage and a compliance window. The calculator returns the error budget percentage plus the allowed downtime in a human-readable duration and minutes. For example, a 99.9% SLO over 30 days allows 0.1% of errors, which is about 43.2 minutes of downtime.

Question 2

Which formula does the error budget calculator use?

Accepted Answer

It uses error budget = 100% minus the SLO target, then allowed downtime = error budget times the window in minutes. With total requests, allowed failed requests = error budget times total requests. For example, a 99.95% SLO over 30 days gives 0.05% times 43200 minutes, which is about 21.6 minutes.

Question 3

Which inputs are accepted?

Accepted Answer

Enter an SLO target from 90 to below 100 percent and choose a 24-hour, 7-day, 30-day, or 90-day window. Optionally enter total requests as a whole number from 1 to 1000000000000 to also see the allowed failed-request count. Empty values, non-numeric text, and values outside these ranges show a clear error instead of a result.

Question 4

Do my numbers stay private?

Accepted Answer

Yes. The calculation and copy action run locally in your browser. CodeASystem does not upload or store the values you enter.

Error Budget Calculator for everyday work.