How do I calculate fuel cost for a road trip?

To calculate fuel cost: divide the distance by your vehicle's fuel efficiency to get liters or gallons needed, then multiply by the fuel price. For example: 300 miles ÷ 30 MPG = 10 gallons × $3.50 = $35 total fuel cost.

What is the difference between MPG and L/100km?

MPG (miles per gallon) measures how many miles a vehicle travels per gallon of fuel. L/100km measures how many liters are consumed per 100 kilometers. Higher MPG means better efficiency; lower L/100km means better efficiency.

How can I reduce my fuel costs?

Key ways to reduce fuel costs: maintain proper tire pressure, avoid aggressive acceleration, reduce highway speed, remove unnecessary weight from your vehicle, use cruise control, and keep your engine well-maintained.

Fuel Cost Calculator

Distance km

Fuel Efficiency L/100km

Average car: 7–10 L/100km

Fuel Price per liter

Passengers (for per-person cost)

Compare Vehicles

Edit fuel efficiency values to compare costs for the same trip.

Vehicle L/100km Cost

How to Use

Select your unit system and enter the trip distance.

Enter your vehicle's fuel efficiency and the current fuel price.

Click Calculate to see total cost, fuel needed, and per-person cost.

Features

Metric & Imperial Switch between km/L/100km and miles/MPG with one click.

Multiple Currencies Supports USD, EUR, GBP, JPY, CAD, AUD, KRW and more.

Per-Person Cost Split the fuel cost between multiple passengers for carpooling.

Vehicle Comparison Compare up to 4 vehicles side by side for the same trip.

Use Cases

Road trip planning: Before a long drive, calculate total fuel costs to budget appropriately. Compare the cost of driving vs. flying or taking the train for your destination.

Carpooling cost splitting: Calculate the total fuel cost and divide equally between passengers to make cost-sharing fair and transparent.

New car purchase decision: Compare the annual fuel costs of different vehicle models with different fuel efficiencies to factor operating costs into your purchase decision.

Delivery and logistics: Drivers and business owners can estimate fuel costs for delivery routes to set competitive prices and maintain profit margins.

FAQ

How is fuel cost calculated?

For metric: (Distance ÷ 100) × Fuel efficiency (L/100km) × Fuel price = Total cost. For imperial: (Distance ÷ MPG) × Fuel price = Total cost.

What is a good fuel efficiency for a car?

Excellent is below 5 L/100km (hybrid/EV), good is 5–8 L/100km, average is 8–12 L/100km. For MPG: Excellent is above 45 MPG, good is 30–45 MPG, average is 20–30 MPG.

How can I reduce fuel costs on a road trip?

Key strategies: Maintain proper tire pressure, drive at optimal speed (80–90 km/h on highways), reduce air conditioning use, avoid excessive idling, and plan your route to minimize stops.

How do I convert MPG to L/100km?

To convert US MPG to L/100km: divide 235.21 by the MPG value. Example: 30 MPG = 235.21 ÷ 30 = 7.84 L/100km.

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