Examples
Examples
Try the starting example
- Shift starts
- 2026-10-20T09:00
- Shift ends
- 2026-10-20T17:00
- Breaks: name, start, end, deduct yes/no
- Lunch1,2026-10-20T12:00,2026-10-20T12:30,yes Lunch2,2026-10-20T12:20,2026-10-20T12:50,yes Rest,2026-10-20T15:00,2026-10-20T15:10,no
- Flat hourly rate ($)
- 12
- Elapsed shift minutes
- 480
- Distinct deducted break minutes
- 50
- Remaining paid minutes under supplied flags
- 430
- Flat pay under supplied flags ($)
- $86.00
Try another scenario
- Shift starts
- 2026-10-20T09:00
- Shift ends
- 2026-10-20T17:00
- Breaks: name, start, end, deduct yes/no
- Lunch1,2026-10-20T12:00,2026-10-20T12:30,yes Lunch2,2026-10-20T12:30,2026-10-20T13:00,yes Rest,2026-10-20T15:00,2026-10-20T15:10,no
- Flat hourly rate ($)
- 12
- Elapsed shift minutes
- 480
- Distinct deducted break minutes
- 60
- Remaining paid minutes under supplied flags
- 420
- Flat pay under supplied flags ($)
- $84.00
Calculation method
Calculation method
Elapsed shift minutes
Shift end−start on the supplied fixed-offset clock.
Distinct deducted break minutes
Merge overlapping intervals explicitly marked deduct yes; do not deduct a minute twice.
Remaining paid minutes under supplied flags
Elapsed−union of deducted breaks.
Flat pay under supplied flags ($)
Paid minutes×flat rate/60, rounded half-up to US cents.
Symbols and units
- a
- Shift starts
- b
- Shift ends
- c
- Breaks: name, start, end, deduct yes/no
- d
- Flat hourly rate ($)
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
- Deduction flags must already reflect the applicable agreement and law. The calculator measures their arithmetic effect; it does not determine whether a break may be unpaid.
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
US Department of Labor: pay/time recordkeeping background; actual rules vary ↗
Background reading; this does not imply endorsement or independent review of SumFizz.