Car Running Costs Calculator

Enter annual miles, mpg, and the US pump price per gallon, plus insurance, service, tires, parking, and registration. At 12,000 miles, 28 mpg and 3.20 per gallon plus the fixed costs from example 1 you get 3,881.43 for the year. That is a running-cost year, not TCO.

Inputs

Fuel (required when mileage is greater than zero)
Fixed costs (optional)

Results

Annual miles, mpg, US pump price, and service. The result shows up here.

Need mpg first? Use the MPG calculator. One trip: trip fuel cost. Receipts: cost per mile. This page totals a US running-cost year in miles and US gallons.

How the results are calculated

How yearly fuel is counted
Mileage12,000 mi
Economy28 mpg
Price3.20
Fuel1,371.43

The calculator calculates fuel as miles divided by mpg, then times the pump price. 12,000 miles at 28 mpg and 3.20 per gallon is about 428.57 gallons and 1,371.43 for fuel. You then add service, insurance, tires, monthly parking times 12 (or a yearly parking amount if you choose that option), and annual tax. Example 1 totals 3,881.43, or 323.45 a month and 0.3235 per mile. Fuel is about 35.3% of that total. Insurance is about 30.9%.

Example 2 at 5,000 miles, 32 mpg, and 3.20 plus the fixed costs from that example totals 2,640 a year and 0.5280 per mile, because the fixed costs do not shrink with mileage. Example 3 at 25,000 miles, 24 mpg, and 3.20 plus higher fixed costs totals 6,163.33, with fuel at about 54.1% of the total and 0.2465 per mile.

The fields are annual mileage, fuel economy, price, service, insurance, tires, parking or wash, and registration or vehicle tax. Parking is monthly by default and the calculator multiplies it by 12; you can enter an amount that is already yearly. The other amounts are yearly. Auto insurance goes in as one yearly premium. This form does not price those policies.

The default is a US year: miles, mpg, and a US gallon (about 3.785 L), not a UK imperial gallon. UK readers can still enter miles and mpg; put MOT in service and Vehicle Excise Duty in the tax line. Metric labels are optional. A typed 12,000 is not rewritten as kilometers. A comma and a period in 3.20 parse the same way.

One trip is on the trip fuel cost page. Receipts divided by mileage are on cost per mile. The TCO calculator adds purchase, a payment, and value loss. There is no car price here. Blank mileage does not fill 12,000 from the example and does not calculate a yearly total. With mileage at zero, only the fixed costs remain, with no fuel.

Enter the example 1 numbers, click Calculate, and match 3,881.43. Then drop to 5,000 miles: 2,640. That is an estimate from the categories you enter, not a live pump feed.

How to use

  1. Enter annual mileage and fuel economy, for example 12,000 miles and 28 mpg. At mileage zero the calculator uses the fixed costs only, with no fuel.
  2. Enter fuel price, for example 3.20 per gallon, matching the field label.
  3. Add service and state inspection, insurance, tires, and registration or vehicle tax as yearly amounts. Parking is monthly and the calculator multiplies it by 12, unless you choose an amount that is already yearly. Enter a US gallon price, not an imperial gallon.
  4. In Advanced mode you can build mileage from a commute: one-way × 2 × workdays plus extra miles. You can also compare a second car there.
  5. Click Calculate. Example 1 is 3,881.43 a year, 323.45 a month, and 0.3235 per mile. The result also shows gallons, a weekly amount (the yearly total divided by 52), and mileage or price variants.
  6. Open the TCO calculator for purchase and value loss. Here you count a year of upkeep from six categories.

Running costs: mpg and fixed costs

Fuel from mileage plus service, insurance, tires, parking, and tax. 12,000 miles, 28 mpg, and 3.20 a gallon plus example 1 fixed costs total 3,881.43 for the year.

mpg
Fuel economy in example 1: 28 mpg at 12,000 miles and 3.20 per gallon. Fuel is about 35.3% of 3,881.43. That is not TCO with value loss.
insurance
The annual insurance line. 1,200 in example 1 is about 30.9% of 3,881.43. At 5,000 miles the fixed share grows because mileage is lower.
service
Yearly upkeep. 600 in example 1. At 25,000 miles, service 900 and fuel dominate, total 6,163.33.

Usage examples

Example 1

  • 12,000 mi/year · 28 mpg · 3.20 / gal
  • service 600 · insurance 1200 · tires 200
  • parking 30/mo · tax 150

Total annual cost 3,881.43

Monthly 323.45 · Per mile 0.3235

Year at 12,000 mi, 28 mpg, $3.20/gal + fixed costs? ≈ $3,881.43 (fuel $1,371.43 ≈ 35.3%).

Example 2

  • 5,000 mi/year · 32 mpg · 3.20 / gal
  • service 400 · insurance 900 · tires 120
  • parking 50/mo · tax 120

Total annual cost 2,640.00

Monthly 220.00 · Per mile 0.5280

5,000 mi/yr + example 2 fixed costs → ≈ $2,640 (higher cost per mile at lower mileage).

Example 3

  • 25,000 mi/year · 24 mpg · 3.20 / gal
  • service 900 · insurance 1400 · tires 350
  • parking 0 · tax 180

Total annual cost 6,163.33

Monthly 513.61 · Per mile 0.2465

25,000 mi/yr + example 3 fixed costs → ≈ $6,163.33 (fuel ≈ 54.1% of the total).

Common questions

How do I calculate annual car running costs?

Compute fuel as miles ÷ mpg × pump price per US gallon, then add service, insurance, tires, annual parking, and tax. Example: 12,000 miles, 28 mpg, $3.20/gal plus the form fixed costs → about $3,881.43 a year.

What is the yearly total at 12,000 miles, 28 mpg, and $3.20 per gallon plus fixed costs?

About $3,881.43 a year, $323.45 a month, and $0.3235 per mile. Fuel is about $1,371.43 (about 35.3%). That is a running-cost year, not TCO.

Is this the same as a trip fuel-cost calculator?

No. Trip fuel cost covers gallons for one stretch. Here you also add service, insurance, tires, parking, and tax for a full year.

Does the result include purchase price and depreciation?

No. Purchase, loan, lease, and trade-in stay outside the result. For full ownership cost use the car TCO calculator.

Is this a free car running costs calculator?

Yes. Enter mileage, mpg, pump price, and fixed costs and you see year, month, and per-mile totals at once. No account required.

What is the total at 12,000 miles, 28 mpg, 3.20 and example 1 fixed costs?

The total is 3,881.43 a year, 323.45 a month, and 0.3235 per mile. Fuel is about 1,371.43 (35.3%). Insurance is 1,200 (30.9%).

What about 5,000 miles in example 2?

The total is 2,640 a year and 0.5280 per mile. The fixed share is larger than in example 1, because the same kinds of yearly costs sit on fewer miles.

What about 25,000 miles in example 3?

The total is 6,163.33 a year and 0.2465 per mile. Fuel is about 54.1% of the total.

How is this different from TCO?

There is no purchase, loan payment, or value loss here. The TCO calculator adds those. This page uses six running-cost lines for one year.

Is parking yearly?

By default, the field is monthly and the calculator multiplies it by 12. If you choose an amount that is already yearly, it does not multiply again. Tax and insurance are yearly amounts you enter.

Is the default in miles and US gallons?

Yes. This English page is built for a US year: miles, mpg, and a US gallon, not an imperial gallon. Metric labels are optional. UK readers can keep miles and mpg; put MOT in service and Vehicle Excise Duty in the tax line. A typed 12,000 is not converted by itself.

What if mileage is blank?

A blank mileage field: the calculator does not calculate a yearly total and does not fill 12,000 from the example. Zero in that field: service, insurance, tires, parking, and tax remain, with no fuel.

Do pump prices update themselves?

No. You enter 3.20 or another pump price. The station does not connect to this page.

Where do I measure 28 mpg?

On the MPG calculator from miles driven and gallons filled. Here you already enter a known economy.

Are tires a yearly average?

Yes: a yearly average for sets, not one tire. Zero is fine in a year you do not buy any.

How do I build mileage from a commute?

In Advanced mode enter one-way distance, workdays, and extra miles. A blank field counts as zero. The calculator uses one-way × 2 × workdays plus extra miles, then writes that into the mileage field. Example: 15 miles, 240 days, and 2,000 extra miles is 9,200 miles.

How is weekly cost calculated?

The calculator divides the yearly total by 52. In example 1 that is 3,881.43 ÷ 52, or 74.64 a week. That is an average from the year, not a line from a pump receipt.

How do I compare two cars at the same mileage?

In Advanced mode turn on the comparison. When mileage is above zero, enter car B economy. If car B price, service, insurance, or tire fields are blank, the calculator copies car A. Mileage, parking, and tax stay shared. At mileage zero the comparison uses the fixed costs only, with no fuel. The result shows the car B year total and the difference B minus A.

This is a running-cost year, not TCO and not a pump receipt. Measure tank mpg on the MPG calculator.

Knowledge sources

Use and cost come from your own numbers. Below is the FuelEconomy.gov and EPA vocabulary.

Page updated October 29, 2026.