THE NUMBERS, EXPLAINED
How to use this calculator.
All entered legs count against one hire allowance. Fuel, tax and deposits are excluded unless included in base hire.
Start with your inputs
Enter route leg distances (km), included mileage (km), excess fee (currency/km), base hire charge (currency). Keep amounts in the units shown on each field. The example is a starting point, not a recommended value.
| Input | Example value |
|---|---|
| Route leg distances (km) | 100,80,40 |
| Included mileage (km) | 150 |
| Excess fee (currency/km) | 0.5 |
| Base hire charge (currency) | 100 |
A worked example
With the example inputs above, total route (km) is 220. Change the inputs to explore your own scenario.
| Result | Example answer |
|---|---|
| Total route (km) | 220 |
| Excess mileage (km) | 70 |
| Hire charge | 135 |
How this is calculated
Total route (km)
Sum all route-leg distances.
Excess mileage (km)
Subtract included mileage, floored at zero.
Hire charge
Add excess mileage charge to base hire.
Symbols and units
- a
- Route leg distances (km)
- b
- Included mileage (km)
- c
- Excess fee (currency/km)
- d
- Base hire charge (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
All entered legs count against one hire allowance. Fuel, tax and deposits are excluded unless included in base hire.
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?
Total route (km); Excess mileage (km); Hire charge. 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: All entered legs count against one hire allowance. Fuel, tax and deposits are excluded unless included in base hire.
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.
Read the quality report →