Fuel Cost Per Mile at $4 Gas and 25 MPG
At $4.00 per gallon and 25 MPG fuel economy, your fuel cost is exactly $0.16 per mile.
Did this tool answer your question?
Thanks — this helps us improve the tool.
How to use this tool
- Enter the current price of fuel per gallon.
- Enter your vehicle's fuel economy in MPG.
- The calculator returns cost per mile and cost per 100 miles.
With gas at $4 a gallon and a car getting 25 MPG, you pay $0.16 for every mile you drive — see how it changes with your actual numbers.
Frequently asked questions
- How do I calculate fuel cost per mile?
- Divide the price per gallon by your MPG. For example, $3.50/gal ÷ 28 MPG = $0.125 per mile ($12.50 per 100 miles).
- What is the IRS mileage rate?
- The IRS standard mileage rate covers fuel, maintenance, and depreciation. For 2025 it is 70 cents per mile for business use. Fuel cost alone is typically 10–20 cents per mile.