Auto calculator
Fuel Cost Calculator
Estimate trip fuel cost from distance, MPG, and gas price.
Quick answer
How do you calculate the fuel cost of a trip?
Divide the distance by your car's MPG to get gallons, then multiply by the price per gallon. A 300-mile trip at 30 MPG and $3.50 a gallon uses 10 gallons and costs $35.
Trip cost = (distance / MPG) × fuel price
⚡ Answer updates as you type · Enter = calculate · Esc = reset
The Fuel Cost Calculator estimates trip fuel expense from distance, MPG, and gas price.
About this Fuel Cost Calculator
Estimate the cost of fuel for a road trip or daily commute based on distance, vehicle MPG, and current gas price. Compare two cars or two routes side by side.
What you'll need
- • Trip distance
- • Vehicle MPG
- • Fuel price per gallon (or per liter)
How it works
- 1. Enter your trip distance.
- 2. Enter the car's MPG.
- 3. Enter the local fuel price.
- 4. View total cost and gallons used.
Worked example
A 600-mile trip in a car that gets 30 MPG with gas at $4/gal costs $80.
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Fuel Cost Calculator FAQ
What is the Fuel Cost Calculator?
The Fuel Cost Calculator is a free online tool that helps you estimate trip fuel cost from distance, mpg, and gas price.
How do I use the Fuel Cost Calculator?
Open the Fuel Cost Calculator, enter the requested values, and review the instant estimate on the page.
Is the Fuel Cost Calculator free?
Yes. The Fuel Cost Calculator is free to use on Fast Online Calculator and does not require an account.
Can I use this for a daily commute?
Yes—use round-trip miles and multiply by working days for monthly or yearly fuel cost.
Does it work in liters and km?
Yes, the calculator supports both US (MPG/gallon) and metric (L/100km) inputs.
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