Examples
Examples
Try the starting example
- Created timestamp on one fixed-offset clock
- 2026-10-23T16:30
- Response allowance in counted business minutes
- 120
- Business windows: weekday Monday 1–Sunday 7, start HH:MM, end HH:MM
- 1,09:00,17:00 2,09:00,17:00 3,09:00,17:00 4,09:00,17:00 5,09:00,17:00
- Holiday dates comma-separated, or none
- 2026-10-26
- Paused timestamp intervals: start,end, or none
- none
- Business-clock deadline
- 2026-10-27T10:30
- Counted allowance (business minutes)
- 120
- Elapsed calendar minutes to deadline
- 5400
- Calendar minutes not counted
- 5280
Try another scenario
- Created timestamp on one fixed-offset clock
- 2026-10-23T16:30
- Response allowance in counted business minutes
- 120
- Business windows: weekday Monday 1–Sunday 7, start HH:MM, end HH:MM
- 1,09:00,17:00 2,09:00,17:00 3,09:00,17:00 4,09:00,17:00 5,09:00,17:00
- Holiday dates comma-separated, or none
- none
- Paused timestamp intervals: start,end, or none
- none
- Business-clock deadline
- 2026-10-26T10:30
- Counted allowance (business minutes)
- 120
- Elapsed calendar minutes to deadline
- 3960
- Calendar minutes not counted
- 3840
Calculation method
Calculation method
Business-clock deadline
Advance through supplied weekday windows, excluding whole holiday dates and the union of pause intervals. Stop when counted minutes equal allowance.
Counted allowance (business minutes)
Entered whole-minute allowance; zero allowance returns the creation timestamp even outside opening hours.
Elapsed calendar minutes to deadline
Deadline−creation timestamp.
Calendar minutes not counted
Calendar elapsed−business allowance, without double-counting overlapping windows or pauses.
Symbols and units
- a
- Created timestamp on one fixed-offset clock
- b
- Response allowance in counted business minutes
- c
- Business windows: weekday Monday 1–Sunday 7, start HH:MM, end HH:MM
- d
- Holiday dates comma-separated, or none
- e
- Paused timestamp intervals: start,end, or none
Use the units shown. A list keeps the order in which you enter its values. The symbol ^ means “raised to the power of”.
Assumptions & limits
Assumptions & limits
- A fixed-offset business clock with explicit calendar, holidays and pauses. It does not infer timezones, daylight-saving changes, contractual SLA rules or automatic acknowledgement exclusions. Deadline horizon is bounded.
Are these inputs private?
These calculations run in your browser. A shared link contains the values you choose to share. Only questions submitted to the separate AI finder are sent to OpenAI.
Further reading
Zendesk: response metrics and business-hour definitions; this tool uses its displayed convention ↗
Background reading; this does not imply endorsement or independent review of SumFizz.