Cost per Mile Calculator

The formula is simple: Cost per Mile = Total Cost ÷ Distance Traveled in Miles. For example, if your trip cost $50 in fuel and you drove 100 miles, your cost per mile is $0.50. This calculator handles the unit conversions automatically, so you can enter values in miles or kilometers, mpg or L/100km.

For fuel alone, the average American driver pays roughly $0.10–$0.18 per mile depending on their vehicle's fuel efficiency and local gas prices. When you include depreciation, insurance, maintenance, and other fixed costs, the AAA estimates total ownership costs closer to $0.50–$0.80 per mile for the average car.

The IRS sets a standard mileage reimbursement rate each year to account for all vehicle operating costs. For 2024, the business mileage rate is 67 cents per mile. This rate covers not just fuel but also depreciation, maintenance, and insurance — making it higher than the pure fuel cost per mile this calculator estimates.

To convert L/100 km to mpg, use the formula: mpg = 235.21 ÷ (L/100 km). For example, a car rated at 8 L/100 km gets approximately 29.4 mpg. This calculator handles that conversion automatically when you select your fuel efficiency unit from the dropdown.

Using the formula Cost per Mile = Total Cost ÷ Distance, a $175 total fuel cost over 350 miles works out to exactly $0.50 per mile. You can verify this by entering 350 miles as the trip distance, then adjusting your fuel efficiency and gas price inputs until the Total Fuel Cost reads $175.

This calculator focuses on fuel costs only. For a full cost-per-mile picture, you'd also need to factor in insurance, vehicle depreciation, loan payments, maintenance, tires, and registration fees. Truckers and business drivers often add fixed and variable cost categories to arrive at a true per-mile operating cost.

The most effective ways to reduce your fuel cost per mile are improving fuel efficiency (regular tune-ups, proper tire inflation, avoiding aggressive acceleration), choosing a more fuel-efficient vehicle, and shopping for lower gas prices. Combining trips and reducing idle time also help stretch every gallon further.

Yes — truckers can use this tool to estimate their fuel cost per mile by entering total trip distance, their truck's fuel efficiency (typically 5–8 mpg for a semi), and current diesel prices. For a full trucking cost-per-mile analysis including fixed costs like insurance and lease payments, you'd add those expenses on top of the fuel figure this calculator provides.