Examples
Examples
Try the starting example
- Clock records: name, start timestamp, end timestamp
- Day,2026-10-20T09:07,2026-10-20T17:02
- Clock grid interval minutes, dividing 1440
- 15
- Endpoint rounding: nearest, floor or ceil
- nearest
- Flat hourly rate for effect comparison ($)
- 12
- Actual recorded minutes
- 475
- Minutes after endpoint rounding
- 480
- Rounded minus actual minutes
- 5
- Actual-minute flat pay ($)
- $95.00
- Rounded-minute flat pay ($)
- $96.00
- Rounded minus actual flat pay ($)
- $1.00
Try another scenario
- Clock records: name, start timestamp, end timestamp
- Day,2026-10-20T09:08,2026-10-20T17:07
- Clock grid interval minutes, dividing 1440
- 15
- Endpoint rounding: nearest, floor or ceil
- nearest
- Flat hourly rate for effect comparison ($)
- 12
- Actual recorded minutes
- 479
- Minutes after endpoint rounding
- 465
- Rounded minus actual minutes
- -14
- Actual-minute flat pay ($)
- $95.80
- Rounded-minute flat pay ($)
- $93.00
- Rounded minus actual flat pay ($)
- -$2.80
Calculation method
Calculation method
Actual recorded minutes
Sum supplied elapsed shift minutes.
Minutes after endpoint rounding
Round both clock endpoints to the specified grid. Nearest ties round forward; floor/ceil apply to both endpoints.
Rounded minus actual minutes
Rounded minutes−actual minutes.
Actual-minute flat pay ($)
Actual total minutes×rate/60, rounded to US cents.
Rounded-minute flat pay ($)
Rounded total minutes×rate/60, rounded to US cents.
Rounded minus actual flat pay ($)
Rounded pay−actual pay.
Symbols and units
- a
- Clock records: name, start timestamp, end timestamp
- b
- Clock grid interval minutes, dividing 1440
- c
- Endpoint rounding: nearest, floor or ceil
- d
- Flat hourly rate for effect comparison ($)
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
- Measures a rounding convention’s effect without endorsing its use. Actual-time, neutrality, recordkeeping and wage-law requirements must be assessed separately.
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.