How to use Business days
- 1. Set start and end dates. ISO dates.
- 2. Add N business days. Weekends skipped.
- 3. Set SLO % and window. Allowed downtime minutes.
- 4. Subtract burned minutes. Remaining budget.
About this tool
Weekday math and error budgets show up in the same runbooks. This tool adds or counts business days (Saturday/Sunday in UTC) and turns an SLO percentage into allowed downtime minutes.
Holidays
Not included. Plug a calendar in your own app.
SLO
99.9% over 30 days is a common example. Confirm the window your org actually uses.
Code examples
SLO
99.9% of 30d