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Fuel Cost Calculator

Estimate your trip fuel cost based on distance, efficiency, and gas price.

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Fuel Cost Calculator

Distance · Efficiency · Price → Total cost

Quick Presets

Distance

Fuel Efficiency

Fuel Price

per liter

Fuel Cost Calculator — Estimate Gas Expenses for Any Trip

Planning a road trip or just want to know your daily commute cost? This fuel cost calculator estimates your total gas expense based on the distance you'll travel, your vehicle's fuel efficiency, and the current fuel price. It supports both metric (km, L/100km) and imperial (miles, MPG) units, plus multiple currencies. Use the quick presets for common trip distances or enter your own values for a precise estimate. The calculator also shows your cost per kilometer and per mile for easy comparison.

When to Use This Calculator

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Road Trips

Budget fuel costs before hitting the road

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Daily Commute

Calculate monthly commute fuel expenses

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Vehicle Comparison

Compare fuel costs between different cars

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Drive vs. Fly

Compare driving cost to airfare

Frequently Asked Questions

How do I find my car's fuel efficiency?

Check your car's manual, the sticker on the driver's door jamb, or look it up on fueleconomy.gov. You can also calculate it: fill your tank, drive, fill again, then divide miles driven by gallons used.

What's the difference between L/100km and MPG?

L/100km (liters per 100 kilometers) is used in Europe, Asia, and Australia — lower is better. MPG (miles per gallon) is used in the US and UK — higher is better. 30 MPG ≈ 7.8 L/100km.

How can I reduce fuel costs?

Drive at steady speeds (cruise control helps), avoid aggressive acceleration, keep tires inflated, remove roof racks when not in use, and plan routes to avoid traffic. Even 5 MPH slower on the highway can improve efficiency by 5-10%.

Does AC affect fuel consumption?

Yes, running AC can increase fuel consumption by 5-25% depending on the vehicle and conditions. However, at highway speeds, AC is generally more fuel-efficient than rolling down windows (which creates aerodynamic drag).

Related Calculators

Alex Kim

UX Researcher & Life Efficiency Consultant

DailyFlow Solutions

"Fuel costs are one of the biggest variable expenses in most households. Before any road trip, I always run the numbers—it's often the deciding factor between driving and flying, especially with a family. This calculator handles both metric and imperial units so it works no matter where you are in the world."

UX Research Specialist Productivity Coach Stanford Design Alum

Average Fuel Efficiency

Small Car 6.5 L/100km (36 MPG)

Sedan 8.0 L/100km (29 MPG)

SUV 10.5 L/100km (22 MPG)

Truck 12.0 L/100km (20 MPG)

Hybrid 4.5 L/100km (52 MPG)

💡 Fuel Saving Tips

🚗 Drive 55-65 mph for optimal fuel efficiency

🛞 Check tire pressure monthly — low tires waste fuel

⛽ Fill up on weekdays when gas prices are often lower

🗺️ Use GPS to find the most fuel-efficient route