Vehicle Depreciation Per Mile Calculator
Estimate straight-line depreciation cost per mile from purchase price, expected resale value and miles driven during ownership.
What this result actually means
Estimate straight-line depreciation cost per mile from purchase price, expected resale value and miles driven during ownership. The page keeps the formula visible—Depreciation per mile = (purchase price − resale value) ÷ ownership miles.—so you can see exactly which assumption moves the answer instead of treating the calculator as a black box.
Straight-line depreciation per mile is a planning simplification. Purchase price, resale value, age, market conditions, mileage bands, accidents, and time all affect real depreciation, so use the output as a cost allocation rather than a resale forecast.
Inputs that control the answer
Driving-cost estimates become more useful when distance, fuel economy, time, and per-mile costs are kept in the same time period. The calculator handles one defined slice of that problem so you can combine it with other vehicle-cost tools without double counting.
| Input | Example | What to enter |
|---|---|---|
| Purchase price ($) | 30000 | Use the current quote, contract rate, or price that applies to this scenario. Small price changes can materially move the final cost. |
| Expected resale value ($) | 12000 | Use the value that applies to the exact scenario you are modeling; keep its units consistent with the label. |
| Miles driven during ownership | 90000 | Measure or source this value from the real job, route, or record. Unit mistakes here propagate directly into the result. |
Worked example
Using the example values loaded in the calculator (Purchase price = 30000, Expected resale value = 12000, Miles driven during ownership = 90000), the browser-side formula produces the outputs below. These are example numbers, not recommended project or business settings.
| Output | Example result |
|---|---|
| Total depreciation | $18,000.00 |
| Depreciation per mile | $0.20 |
| Depreciation per 1,000 miles | $200.00 |
First checkpoint: Total depreciation = $18,000.00. Change the inputs to your real scenario before using the number for an order, budget, quote, bid, reimbursement, or operating decision.
Where estimates go wrong
- Mixing weekly, monthly, and annual mileage in the same scenario.
- Using an optimistic MPG or cost-per-mile figure that does not match the route or vehicle.
- Counting the same toll, parking, fuel, or reimbursement item twice.
Straight-line depreciation per mile is a planning simplification. Purchase price, resale value, age, market conditions, mileage bands, accidents, and time all affect real depreciation, so use the output as a cost allocation rather than a resale forecast.
Related calculators
Questions people run into
How is depreciation per mile calculated?
Subtract expected resale value from purchase price, then divide the depreciation amount by the ownership miles you expect to drive.
Does a car depreciate in a straight line?
Not in reality. This calculator allocates depreciation evenly across ownership miles for planning. Market value changes nonlinearly with age, condition, mileage, and demand.
Should taxes and financing be included?
Not unless you deliberately add them to your cost basis outside this formula. This page isolates purchase-to-resale depreciation.
Method and limits
Formula: Depreciation per mile = (purchase price − resale value) ÷ ownership miles.
The calculator runs locally in your browser from the values you enter. The mathematical result is deterministic from those inputs; the planning accuracy depends on whether the inputs represent the real job, route, policy, product, or operating conditions. When the result is close to a purchase threshold, package boundary, safety limit, or financial break-even point, verify the controlling assumption before acting.
Reviewed for calculator depth and clarity · September 2026 · Methodology