How to use (3 steps)
- Pick what you need: real-world fuel economy, gas cost from distance, or full trip cost with split per person.
- Select Metric or US/Imperial units, enter distance and fuel economy (or odometer data), and add tolls or parking if needed.
- Results update automatically. Use “Copy URL” to keep the same inputs when sharing.
Switching unit systems changes labels only; it does not convert the numbers you already typed.
Inputs
Enter typical values for your route. Currency is cosmetic; the calculator works with any symbol.
Enter or adjust the values on the left to see fuel economy, gas cost, and per-person totals here.
What these results mean
Values will summarize your chosen mode: fuel economy in km/L, gas cost per trip, or cost per person.
Figures are rounded to 2 decimals. Real-world results vary with traffic, driving style, weather and load.
How it’s calculated
- Fuel economy (km/L) = distance (km) ÷ fuel used (L). Fuel consumption in L/100km is fuel per 100 km. mpg shows miles per gallon. All three are converted internally so you can compare them.
- Gas cost = fuel used × price per liter (or per gallon converted into price per liter).
- Round-trip calculations double the one-way distance; monthly estimates multiply by the number of round trips.
- Total trip cost = gas cost + tolls + parking + rental + other. Cost per person divides that total by the number of people.
- These are estimates only; actual fuel economy and prices change with road, weather, and vehicle conditions.
FAQ
Which unit system should I pick?
Choose Metric (km, L) for km/L or L/100km inputs. Choose US/Imperial for miles and gallons. The calculator converts between them internally, so results stay comparable.
How are km/L, L/100km and mpg converted?
All fuel economy values are turned into liters per kilometer internally. km/L is inverted, L/100km is divided by 100, and mpg is converted from miles and gallons. The calculator then reports all three formats rounded to two decimals.
Do I have to enter tolls or parking?
They are optional. If you leave them blank or zero, totals will only include gas. Adding tolls, parking or rental fees gives a fuller picture for road trips.
Is my data saved or sent somewhere?
Everything runs in your browser. Values are not sent to a server. Use the “Copy URL” button only when you want to share a scenario deliberately.