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How This Calculator Works
A trip’s fuel cost is the distance traveled, divided by your vehicle’s fuel economy, multiplied
by the price of fuel. Enter your trip distance, your vehicle’s fuel economy (in MPG or L per 100
km, whichever you know), and the price of fuel, and this calculator returns how much fuel you’ll
need and what it will cost.
If you don’t already know your vehicle’s fuel economy, the Gas Mileage (MPG) Calculator
figures it out from your last fill-up, and its result carries straight into this calculator.
The Formula
Fuel Needed (L)=Distance (km)×(L per 100 km÷100)Total Cost=Fuel Needed×Price per LiterCost per km=DistanceTotal Cost
When working in MPG and price-per-gallon instead, this calculator converts internally so the math
comes out the same regardless of which unit system you’re more comfortable with.
Worked Example
A 500 km trip in a vehicle getting 8 L per 100 km, with fuel at $1.50 per liter:
Fuel Needed: 500×(8÷100)=40 liters.
Total Cost: 40×1.50=60.00.
Cost per km: 60.00÷500=0.12.
Cómo funciona esta calculadora
El costo de combustible de un viaje es la distancia recorrida, dividida entre el rendimiento de
combustible de tu vehículo, multiplicada por el precio del combustible. Ingresa la distancia de
tu viaje, el rendimiento de combustible de tu vehículo (en MPG o L por 100 km, el que conozcas) y
el precio del combustible, y esta calculadora indica cuánto combustible necesitarás y cuánto
costará.
Si aún no conoces el rendimiento de combustible de tu vehículo, la Gas Mileage (MPG) Calculator
lo calcula a partir de tu última carga de combustible, y su resultado pasa directamente a esta
calculadora.
La fórmula
Combustible necesario (L)=Distancia (km)×(L por 100 km÷100)Costo total=Combustible necesario×Precio por litroCosto por km=DistanciaCosto total
Cuando trabajas en MPG y precio por galón en su lugar, esta calculadora convierte internamente
para que el resultado matemático sea el mismo sin importar con qué sistema de unidades te sientas
más cómodo.
Ejemplo resuelto
Un viaje de 500 km en un vehículo que rinde 8 L por 100 km, con combustible a $1.50 por
litro:
How do I find my vehicle's fuel economy if I don't already know it?
Use Gas Mileage (MPG) Calculator to work it out from your last fill-up — enter the distance you drove and the fuel it took, and that result carries straight into this calculator.
Does this account for fuel price changes during a long trip?
No — this uses a single fuel price for the entire trip, which is a reasonable estimate for most trips. For a longer road trip where prices vary significantly by region, you could split it into legs and calculate each separately with that region's typical price.
Why do I need to know both MPG and price per gallon (or L/100km and price per liter)?
Fuel economy tells you how much fuel the trip needs; price per unit tells you what that fuel costs. This calculator multiplies the two together, so it needs both figures in a consistent unit pairing (MPG with price-per-gallon, or L/100km with price-per-liter) — switching the fuel economy unit automatically relabels the price field to match.
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