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Fuel Cost Calculator

Calculate gas and fuel costs for road trips and daily commutes in Metric or Imperial units.

Runs in your browser. Nothing you add is uploaded.

What the Fuel Cost Calculator does

Planning a road trip or budgeting daily vehicle commutes requires knowing how much gasoline or diesel you will burn and what it will cost. This calculator computes fuel volume, total journey cost, and per-passenger splits in either Metric (km, L/100km, $/L) or Imperial (miles, MPG, $/gal) with preloaded vehicle efficiency presets.

How to calculate fuel and road trip costs

  1. Select your measurement system: Metric (km, Liters) or Imperial (miles, Gallons).
  2. Enter the one-way distance, or toggle Round Trip to automatically double the mileage.
  3. Input your vehicle's fuel efficiency, or select a preset (Hybrid, Sedan, SUV, Truck, Motorcycle).
  4. Enter the local price per liter or gallon of fuel.
  5. Set the number of passengers to split the cost, and copy the full travel expense summary.

The Fuel Cost Calculator runs entirely in your browser — nothing you enter is uploaded, stored, or logged.

When to use it

Road Trip Travel Planning & Expense Sharing

Work out total gas costs before departing on holiday and split fuel expenses fairly among carpool passengers.

Daily Commute Budgeting

Calculate your monthly fuel expenditure for work commutes to evaluate the financial benefits of public transit or electric vehicles.

Business Mileage Reimbursement

Generate clear fuel consumption and cost-per-mile figures for freelance or business expense reporting.

Good to know

  • Highway driving typically yields 15-25% better fuel efficiency than stop-and-go city traffic.
  • Maintaining proper tire pressure and steady highway speeds significantly improves vehicle gas mileage.
  • Toggle Round Trip to avoid forgetting the return journey when estimating weekend road trip budgets.

Frequently asked questions

How do I calculate fuel cost for a road trip?

For Metric: (Distance in km / 100) × Fuel Efficiency in L/100km × Price per Liter. For Imperial: (Distance in miles / MPG) × Price per Gallon.

How does passenger splitting work?

The total fuel expense is divided evenly among all specified passengers, giving each traveler's exact fair share for carpools or vacation road trips.

How do I convert MPG to L/100km?

Divide 235.215 by the US MPG value (e.g. 235.215 / 30 MPG ≈ 7.84 L/100km). Lower L/100km numbers indicate higher fuel efficiency.

Does vehicle air conditioning increase fuel consumption?

Yes. Running air conditioning at high settings can increase fuel consumption by roughly 5% to 10%, especially during city driving.

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