Road Trip Cost Calculator
Distance (miles)
Fuel Economy (MPG)
Fuel Price ($/gal)
A road trip fuel cost calculator estimates total petrol/gasoline expenditure from distance, fuel economy, and current fuel price. Add 10–20% for real-world driving conditions.
- 1Fuel used = Distance / Fuel economy
- 2Cost = Fuel used × Price per gallon or litre
- 3US MPG uses US gallon (3.785L); UK MPG uses imperial gallon (4.546L)
- 4EV trips: Cost = Distance / Efficiency × Electricity price
400 miles, 35 mpg, $3.60/gallon=Gallons used = 11.43; Cost = $41.14
| MPG | Gallons | Cost |
|---|---|---|
| 25 mpg | 16.0 gal | $57.60 |
| 30 mpg | 13.3 gal | $48.00 |
| 40 mpg | 10.0 gal | $36.00 |
| 50 mpg | 8.0 gal | $28.80 |
| EV (4mi/kWh) | — | ~$15–20 elec |
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