THE NUMBERS, EXPLAINED
How to use this calculator.
One common reporting period. Available hours equal nominal hours minus excluded downtime; booked hours must be within availability.
Start with your inputs
Enter nominal hours by vehicle, excluded downtime hours, booked hours. Keep amounts in the units shown on each field. The example is a starting point, not a recommended value.
| Input | Example value |
|---|---|
| Nominal hours by vehicle | 40,40 |
| Excluded downtime hours | 5,10 |
| Booked hours | 28,24 |
A worked example
With the example inputs above, available hours by vehicle is 35, 30. Change the inputs to explore your own scenario.
| Result | Example answer |
|---|---|
| Available hours by vehicle | 35, 30 |
| Utilization by vehicle (%) | 80, 80 |
| Fleet weighted utilization (%) | 80 |
How this is calculated
Available hours by vehicle
Subtract excluded downtime from nominal hours.
Utilization by vehicle (%)
Divide booked hours by available hours.
Fleet weighted utilization (%)
Divide total booked hours by total available hours.
Symbols and units
- a
- Nominal hours by vehicle
- b
- Excluded downtime hours
- c
- Booked hours
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
One common reporting period. Available hours equal nominal hours minus excluded downtime; booked hours must be within availability.
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?
Available hours by vehicle; Utilization by vehicle (%); Fleet weighted utilization (%). 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: One common reporting period. Available hours equal nominal hours minus excluded downtime; booked hours must be within availability.
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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