Gas Mileage Calculator

Calculate gas mileage and fuel economy

Unit System

Distance Driven (miles)

Fuel Used (gallons)

Fuel Price ($/gallon)

Current: 300 mi, 12 gal

How It Works

Calculate vehicle fuel efficiency in miles per gallon or liters per 100 kilometers.

A gas mileage calculator determines a vehicle's fuel economy based on distance traveled and fuel consumed. It supports both US and UK gallons for MPG calculations and the metric L/100km standard. Tracking fuel economy over time can help identify maintenance issues, improve driving habits, and compare the efficiency of different vehicles.

Results

Enter values to see results

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Quick Tips

• Results update automatically as you type
• Use Tab to navigate between fields
• Press Enter to calculate

Frequently Asked Questions

How does the Gas Mileage Calculator work?

Simply enter your values into the input fields above. The Gas Mileage Calculator uses standard formulas to compute results instantly as you type or click.

Is the Gas Mileage Calculator free?

Yes, this calculator is completely free to use. No registration, no hidden fees, no limits.

How accurate are the results?

Results are computed using industry-standard mathematical formulas. For critical decisions, we recommend consulting a professional.

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