Cost Per Mile Calculator

Background.

Ask most drivers what their car costs per mile and they will quote a fuel number — cents per gallon divided by miles per gallon — because fuel is the cost they see and pay for at the pump every week. It is also, according to AAA's annual "Your Driving Costs" study, usually the SMALLEST line item in what a vehicle actually costs to own. This calculator adds back everything the pump receipt leaves out: depreciation (the vehicle quietly losing trade-in value every year you own it), insurance, maintenance and tires, finance charges if you borrowed to buy it, and license/registration/tax fees — and combines all six into one honest all-in cost-per-mile figure, the number AAA itself has published annually since 1950 specifically because sticker price alone tells a driver almost nothing about what a car costs to actually live with.

The reason an all-in figure matters is that fixed and variable costs behave completely differently as your driving habits change, and conflating them leads to bad decisions. Fuel and maintenance genuinely scale with miles driven — drive twice as far and you burn twice the gas and wear twice the brake pads, roughly speaking. Insurance, depreciation, financing, and registration do NOT scale with miles the same way — a car sitting in a garage depreciates on a calendar, not an odometer, and an insurance premium and a loan payment are due whether you drive the car once a month or every single day. That means the SAME vehicle has a dramatically different true cost per mile depending on how much you drive it: a low-mileage driver spreads those fixed dollars over fewer miles and pays a much higher cost per mile, while a high-mileage driver dilutes the same fixed dollars over more miles and pays a lower cost per mile — even though their fuel and maintenance costs, and the total dollars they spend on the fixed items, may be nearly identical.

AAA's 2025 "Your Driving Costs" study — the fifth consecutive year of data behind this calculator's default values — put the average new vehicle's total ownership cost at $11,577 per year, assuming 15,000 miles of driving over a five-year ownership horizon: $4,334 a year in depreciation (the single largest line item by a wide margin), $1,694 in insurance, $1,131 in finance charges, $813 in license/registration/taxes, 13.0 cents per mile in fuel, and 11.04 cents per mile in maintenance, repairs, and tires combined. Run those defaults through this calculator and the arithmetic reproduces AAA's own headline figure almost exactly — 77.19 cents per mile, or $11,578 a year at 15,000 miles — independent confirmation that the underlying study numbers are transcribed correctly and that the fixed-plus-variable framework this calculator uses is the same one AAA itself relies on.

What makes this calculator useful beyond just reading AAA's number off a PDF is that every one of the six inputs is editable, so you can replace the national average with YOUR actual insurance quote, YOUR actual loan's interest cost, and YOUR real annual mileage, and see how your specific ownership situation compares to the national baseline. Comparing a cheap-to-buy but expensive-to-insure car against an expensive-to-buy but reliable and cheap-to-insure one, deciding whether financing versus paying cash meaningfully changes your true cost per mile, or figuring out whether driving an older paid-off car is actually cheaper than it feels once depreciation has already mostly happened — all of these are the exact comparisons an all-in cost-per-mile figure is built to support, and none of them show up if you only ever look at the number on the gas pump.

What is cost per mile calculator?

Cost per mile is the total amount a vehicle costs its owner, divided by the number of miles driven, expressed as a single blended rate — the automotive-finance equivalent of a per-unit cost in any other budgeting exercise. It differs fundamentally from a fuel-only cost-per-mile figure (like the one on this site's dedicated fuel-cost calculator) because it captures the FULL financial picture of ownership rather than just the marginal cost of driving one more mile. Economists and cost accountants split those costs into two categories that behave very differently: variable costs (fuel, and most routine maintenance and tire wear) scale roughly proportionally with miles driven, while fixed costs (depreciation, insurance premiums, loan interest, and government registration/title fees) accrue on a calendar basis largely independent of mileage. AAA's annual "Your Driving Costs" study, published continuously since 1950 and the most widely cited independent source for these figures in the United States, calculates both categories across nine vehicle segments (small sedan through half-ton pickup, plus hybrid and electric categories) using a standardized five-year, 75,000-mile ownership assumption, so that different vehicle types can be compared on equal footing. The Internal Revenue Service's standard mileage rate — the flat per-mile figure taxpayers can use instead of tracking actual vehicle expenses for business, medical, or charitable driving — is built on a similar all-in logic, bundling depreciation, insurance, maintenance, and fuel into one number, which makes it a useful sanity-check reference point even though it is calibrated for tax purposes rather than personal budgeting. This calculator's total-cost-per-mile figure is the same conceptual number AAA and the IRS both publish, built from inputs you control so it reflects your actual vehicle and your actual driving habits rather than a national average.

How to use this calculator.

1. 01Start with the AAA 2025 national-average defaults already filled in, or replace each one with your own numbers if you know them — your actual insurance premium, your actual loan's annual interest cost, and so on.
2. 02Enter your realistic annual mileage. This single number matters more than almost any other input, because it determines how thinly your fixed costs (insurance, depreciation, finance, registration) get spread — the same fixed dollar amount produces a very different cost-per-mile figure at 8,000 miles a year versus 25,000.
3. 03Enter fuel cost in cents per mile. If you only know your MPG and local gas price, divide the price per gallon by your MPG and multiply by 100 to get cents per mile (for example, $3.75/gal ÷ 28 mpg × 100 = 13.4 cents/mile) — or use this site's dedicated fuel-cost or MPG calculators to get that figure first.
4. 04Enter maintenance, repair, and tire costs per mile — this covers routine service (oil changes, brakes, fluids) specified by the manufacturer plus an amortized replacement-tire cost. If you don't know your own figure, AAA's 11.04 cents/mile national average is a reasonable starting estimate for a typical new vehicle over five years.
5. 05Enter your annual insurance premium, your vehicle's estimated annual depreciation (how much trade-in value it loses per year — a car's own year-over-year value drop from a dealer trade-in quote or a valuation tool is the most accurate source), your annual loan interest (enter $0 if you paid cash), and your annual registration/title/tax fees.
6. 06Read the total cost per mile as your headline number, and use the fixed-versus-variable breakdown to understand WHY it is what it is: a high total driven mostly by the fixed side means driving more would actually lower your per-mile cost, while a high total driven mostly by the variable side means the vehicle itself (its fuel economy or its maintenance needs) is the real cost driver.
7. 07Use cost per 1,000 miles as a practical planning number for a specific trip or a specific month, and use total annual cost to compare this vehicle's full-year cost against your budget, a different vehicle, or a lease/finance alternative.

The formula.

The calculator splits every ownership cost into two buckets and combines them at the end. Fixed annual costs — insurance, depreciation, finance charges, and license/registration/taxes — are added together in dollars, then divided by annual miles and multiplied by 100 to convert them into cents per mile: fixedCostPerMile = (annualInsurance + annualDepreciation + annualFinance + annualRegistration) / annualMiles × 100. This is the step that makes fixed costs mileage-SENSITIVE in the final output even though the underlying dollars are not: the same $7,972 of annual fixed cost becomes 53.15 cents per mile at 15,000 miles a year but only 26.57 cents per mile at 30,000 miles a year, because the identical dollar amount is being divided by twice as many miles. Variable costs — fuel and maintenance/tires — are already expressed as a per-mile rate, so they simply add on top without any division: variableCostPerMile = fuelCostPerMile + maintenanceCostPerMile. This part of the total does NOT change no matter how much you drive, because it is already a rate rather than a fixed pool of dollars. The total is the sum of the two: totalCostPerMile = fixedCostPerMile + variableCostPerMile. From there, totalAnnualCost simply reverses the first division to recover a full-year dollar figure (totalCostPerMile / 100 × annualMiles), and costPer1000Miles is a convenience scaling of the per-mile rate for trip-planning purposes (totalCostPerMile × 10, since 1,000 miles is 10× the base 100-cents-to-dollars conversion already embedded in the rate). Every AAA input in this calculator's defaults is itself a national average across nine vehicle categories and five top-selling models per category, standardized to a five-year, 75,000-mile ownership horizon — which is why plugging in the unmodified defaults reproduces AAA's own published $11,577 average annual cost almost exactly, off by only about a dollar due to independent rounding in AAA's source figures.

A worked example.

Frequently asked questions.

References& sources.

1. [1]AAA — "Your Driving Costs 2025: How Much Does it Really Cost to Own a New Car?" National-average per-mile and per-year figures for depreciation, finance, fuel, insurance, license/registration/taxes, and maintenance/repair/tires, based on a five-year, 75,000-mile ownership study across nine vehicle categories.
2. [2]Internal Revenue Service — Standard Mileage Rates (Notice / Revenue Procedure, issued annually). The federal all-in per-mile reference rate bundling depreciation, insurance, maintenance, and fuel for business, medical, and charitable driving.
3. [3]AAA Newsroom — "AAA Releases Annual Report on Vehicle Costs" (press summary of the Your Driving Costs methodology and category breakdowns).
4. [4]U.S. Bureau of Labor Statistics — Consumer Expenditure Surveys, transportation cost category (independent government data on household spending on vehicle purchases, fuel, insurance, and maintenance).
5. [5]Consumer Financial Protection Bureau — Auto loans consumer guide (context on financing costs as a component of total vehicle ownership cost).