With the illustrative inputs below, the result is 382.5 .
Try this with your own numbersFormula and worked example
Fuel spend = distance / 100 × litres per 100 km × price per litre
| Input | Example |
|---|---|
| Distance in period | 2,500 km |
| Fuel consumption | 9 L / 100 km |
| Fuel price per litre | 1.7 |
| Calculated result | 382.5 |
Choose reliable inputs
Separate parts, technician time and bay availability for each repair order. For this mobile mechanic calculation, use repair orders, parts invoices and technician time logs and a consistent definition of one repair visit.
- Parts: include the portion belonging to this repair visit or reporting period, and record where the value came from.
- Travel: include the portion belonging to this repair visit or reporting period, and record where the value came from.
- Diagnostic time: include the portion belonging to this repair visit or reporting period, and record where the value came from.
Use the same currency for every money input. Do not mix weekly costs with monthly revenue, or count the same expense in both an itemised cost and allocated overhead.
How do distance and consumption change fuel cost?
This covers fuel only. Idling, loading and actual driving conditions can change consumption.
What if this input changes?
If distance in period rises by 10%, this example changes by 38.25 . This shows the effect of one change; it does not predict what will happen.
Open the calculator, save your baseline, then change the input supported by the least reliable estimate in your records. Compare both scenarios before committing to a price or capacity promise.