Fuel Cost Calculator

Let’s plan your trip

USD
Updates as you type

Total Fuel Cost

—

Fuel Needed

— US gal

Cost Per Mile

—
per mile

Distance Per Dollar

— miles / $1

Budget Driving Range

— miles
With your fuel budget
Input tips

Enter the total distance you’ll drive.

Use your vehicle’s average fuel efficiency.

All prices and costs are in US dollars.

See how far your budget can take you.

Enter your trip details to see an estimate.

An estimate for fuel only. Traffic, terrain, and driving habits can affect actual costs.

Make every dollar go further.

Free to use No sign-up Calculated in your browser

A LITTLE PLANNING. A BETTER DRIVE.

Know your fuel cost before you go. Calculate your trip cost
and see how far every dollar can take you.

THE MATH, MADE SIMPLE

How to Calculate Fuel Cost

A few numbers are all you need to estimate your next trip.

Start with a simple formula

Divide your distance by your fuel efficiency, then multiply by the fuel price. Keep the units consistent.

Using US units(Miles ÷ US MPG) × Price per US gallonUsing metric units(Kilometers × L/100km ÷ 100) × Price per liter

For example: A 150-mile trip at 30 US MPG uses 5 US gallons. At $3.50 per US gallon, your fuel cost is $17.50.

Understanding Fuel Efficiency Units

US MPG is the number of miles you can drive on one US gallon of fuel. A higher number means better fuel efficiency.

L/100km is the number of liters used to drive 100 kilometers. A lower number means better fuel efficiency.

This calculator uses US gallons, not Imperial gallons.
1 mile = 1.609344 km · 1 US gallon = 3.785411784 L

Frequently Asked Questions

How do I calculate fuel cost per mile?

Divide the price per US gallon by your vehicle’s US MPG. At $3.50 per US gallon and 30 US MPG, the fuel cost per mile is about $0.1167 (11.67 cents). This includes fuel only, not maintenance, insurance, or depreciation.

How far can I drive on a $100 fuel budget?

Divide your budget by the fuel cost per mile or kilometer. At 30 US MPG and $3.50 per US gallon, $100 covers about 857.14 miles. The same inputs give you about 8.57 miles per dollar. Change Fuel Budget above to calculate your own range, or leave it blank to skip it.

Will switching units change my trip cost?

No. Switching between US and metric units converts your distance, efficiency, and fuel price to equivalent values. The estimated total stays the same. Currency remains USD, and only US gallons are used.