Examples
Examples
Try the starting example
- Prepaid amount ($)
- 310
- Coverage starts, inclusive
- 2026-10-01
- Coverage ends, exclusive
- 2026-11-01
- Expense through this cutoff, exclusive
- 2026-10-11
- Coverage days
- 31
- Elapsed covered days at cutoff
- 10
- Cumulative allocated expense ($)
- $100.00
- Unexpired prepaid balance ($)
- $210.00
Try another scenario
- Prepaid amount ($)
- 310
- Coverage starts, inclusive
- 2026-10-01
- Coverage ends, exclusive
- 2026-11-01
- Expense through this cutoff, exclusive
- 2026-11-02
- Coverage days
- 31
- Elapsed covered days at cutoff
- 31
- Cumulative allocated expense ($)
- $310.00
- Unexpired prepaid balance ($)
- $0.00
Calculation method
Calculation method
Coverage days
End-exclusive date−start-inclusive date.
Elapsed covered days at cutoff
Clamp(cutoff−start,0,total covered days).
Cumulative allocated expense ($)
Round prepaid amount×elapsed/total days half-up to US cents.
Unexpired prepaid balance ($)
Original prepaid amount−allocated expense.
Symbols and units
- a
- Prepaid amount ($)
- b
- Coverage starts, inclusive
- c
- Coverage ends, exclusive
- d
- Expense through this cutoff, exclusive
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
- An equal-calendar-day allocation with explicit inclusive/exclusive endpoints. It does not infer the recognition pattern required for a contract.
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
OpenStax: financial-accounting model background ↗
Background reading; this does not imply endorsement or independent review of SumFizz.