Travel Cost Per Mile Calculator
What Is a Mile of Driving Actually Costing You?
"Cost per mile" gets used two different ways in practice: sometimes you already know a trip's total cost and want to spread it evenly across the distance, and sometimes you're building the figure up from fuel price and fuel economy plus a maintenance allowance. This calculator supports both directions so you can use whichever inputs you actually have.
The Formula
From total cost:
Cost per Mile = Total Cost ÷ Total Miles
From fuel price and economy:
Fuel Cost per Mile = Fuel Price per Gallon ÷ MPG
Cost per Mile = Fuel Cost per Mile + Maintenance Cost per Mile
Worked Examples
| Mode | Inputs | Cost per mile |
|---|---|---|
| Fuel-based | $3.50/gallon ÷ 25 MPG | $0.1400/mile |
| Fuel-based | $4.00/gallon ÷ 30 MPG | $0.1333/mile |
Fuel-based figures above cover fuel only; add a maintenance cost per mile in the calculator to include wear, tires, and servicing in the total.
Where This Calculation Matters
- Comparing your own car against a rental — a true cost-per-mile figure, not just fuel, is what you need to compare against a flat rental-plus-fuel quote.
- Splitting a road trip's cost fairly — charging fellow passengers a per-mile rate based on actual expenses rather than an arbitrary flat fee.
- Deciding whether to drive or fly — a solid cost-per-mile figure, multiplied by the route distance, is directly comparable to an airfare quote.
How to Use This Calculator
- Select a mode: From Total Cost or From Fuel Price + MPG.
- In total-cost mode, enter Total Cost ($) and Total Miles.
- In fuel-based mode, enter Fuel Price per Gallon ($), Fuel Economy (MPG), and optionally a Maintenance Cost per Mile.
- Select Calculate to see the resulting cost per mile.
Related Calculations
Compare your computed figure against a flat rate with the Mileage Reimbursement Calculator, or estimate fuel cost alone with the Road Trip Fuel Cost Calculator.