THE NUMBERS, EXPLAINED
How to use this calculator.
User supplies counted overlap days under their agreements. Reports double-housing cash outlay and incremental old-home-plus-extra costs relative to paying only the new home.
Start with your inputs
Enter overlap days, old housing daily cost (currency/day), new housing daily cost (currency/day), extra daily utilities (currency/day), temporary storage total (currency). Keep amounts in the units shown on each field. The example is a starting point, not a recommended value.
| Input | Example value |
|---|---|
| Overlap days | 10 |
| Old housing daily cost (currency/day) | 40 |
| New housing daily cost (currency/day) | 50 |
| Extra daily utilities (currency/day) | 5 |
| Temporary storage total (currency) | 100 |
A worked example
With the example inputs above, both homes during overlap is 900. Change the inputs to explore your own scenario.
| Result | Example answer |
|---|---|
| Both homes during overlap | 900 |
| Total overlap outlay | 1,050 |
| Incremental overlap cost | 550 |
How this is calculated
Both homes during overlap
Multiply overlap days by both daily housing rates.
Total overlap outlay
Add both housing rates, extra utilities and storage.
Incremental overlap cost
Exclude the new-home cost that would occur anyway.
Symbols and units
- a
- Overlap days
- b
- Old housing daily cost (currency/day)
- c
- New housing daily cost (currency/day)
- d
- Extra daily utilities (currency/day)
- e
- Temporary storage total (currency)
Use the units shown. A list keeps the order in which you enter its values. The symbol ^ means “raised to the power of”.
Assumptions and limits
User supplies counted overlap days under their agreements. Reports double-housing cash outlay and incremental old-home-plus-extra costs relative to paying only the new home.
Calculations use the values you enter. Blank or invalid inputs show an error instead of silently substituting zero. Results are displayed to useful precision; calculations retain the underlying numeric precision.
Questions about this tool
What does the result tell me?
Both homes during overlap; Total overlap outlay; Incremental overlap cost. The result applies to the method and inputs described above. Check the units and assumptions before using it in a decision.
Why might another calculator differ?
Differences in units, rounding, timing or model definitions can produce different answers. Compare the input definitions and the method, rather than only the final number. For this tool: User supplies counted overlap days under their agreements. Reports double-housing cash outlay and incremental old-home-plus-extra costs relative to paying only the new home.
Are my inputs stored or sent to AI?
Calculations on this page happen in your browser. The separate AI question finder sends its submitted conversation to OpenAI; these calculator fields are not sent. Favourites and recent tool names are stored locally. A shared link contains the inputs you choose to include.
Further reading
OpenStax: Solve proportions and their applications ↗
Background reading; this does not imply endorsement or independent review of SumFizz.
Review status
Software example and browser checks are recorded in our quality report. No external expert review is claimed. Created with coding assistance; calculations run as ordinary browser code.
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