Automotive calculator

Cost Per Mile Calculator

Combine fuel and annual ownership costs to estimate vehicle cost per mile, month, and year.

Build a complete driving-cost estimate

Fuel is only one part of vehicle ownership. A cost-per-mile estimate becomes more useful when it combines mileage-related fuel with annual maintenance, insurance, fees, and value loss or lease expense.

Worked example

At 12,000 miles, 28 MPG, and $3.50 per gallon, annual fuel is about $1,500. Adding $900 maintenance, $1,800 insurance, $250 registration, and $3,500 depreciation produces an estimated $7,950 per year, or about $0.66 per mile.

Which costs to include

• Maintenance: service, repairs, expected tires, inspections, and consumable parts.
• Insurance: the annual premium for the vehicle and coverage scenario being compared.
• Registration and taxes: recurring vehicle fees; avoid double-counting sales tax already included in purchase cost.
• Depreciation: estimated annual decline in value. For a lease, use annualized lease payments instead and avoid counting both.
• Financing: if relevant, add annual interest to another category or combine it with depreciation for planning.

Frequently asked questions

Why can cost per mile fall when I drive more?

Fixed annual costs are divided across more miles. Variable costs still rise with use, and unusually high mileage can accelerate depreciation and maintenance, so the relationship is not perfectly linear.

Should I include the car payment?

A loan payment contains principal and interest. Counting the full payment plus depreciation can double-count ownership value. For a planning shortcut, choose either a cash-flow view using payments or an economic-cost view using depreciation and interest.

Can I use this for reimbursement?

It can document your assumptions, but it does not establish a tax or employer reimbursement rate. Use the current rule or policy that applies to your situation.

How to get a dependable result

• Use measurements from the same trip, billing period, or planning scenario.
• Keep units consistent and enter positive numbers unless the field explicitly allows zero.
• Treat the result as an estimate. Real-world conditions, rounding, equipment efficiency, and changing prices can affect the final amount.

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Sources and review notes

This planning model uses user-entered costs. Tax, reimbursement, and accounting treatment may differ; consult the current official rule or a qualified professional when those decisions matter.

Last reviewed September 2026. This calculator provides an estimate for planning and education; it is not a substitute for a manufacturer specification, professional inspection, or safety advice.