If you learn how to calculate the cost of driving, you can determine how much of your paycheck you spend on driving. Calculate fuel costs, maintenance and insurance to get a rough idea of the most basic expenses.

Method 1
Method 1 of 3:

Calculating Fuel Costs

  1. Do not top off the tank. [1]
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  2. Do not top off when refilling. [2]
  3. Check the odometer again at refilling and subtract the old number on the odometer from the new number to see how far you drove. Write down the difference between the two odometer readings. If the number was 30,000 miles (48,280 km) when you filled the tank the first time and 30,300 (48,763 km) when you refilled, you drove 300 miles (482.8 km) on 1 tank of gas.
  4. For example, if you drove 300 miles (482.8 km) and burned 15 gallons (56.78 liters) of gasoline, your vehicle got about 20 miles per gallon (8.5 km per liter). [3]
  5. (If your car has 30,000 miles [48,280 km] and is 40 months old, you drive about 750 miles [1,207 km] per month.) In this hypothetical example, divide 750 (1,207 km) by 20 gallons (75.7 liters) to get the number of gallons or liters you burn per month: 37.5 gallons (142 liters).
  6. Multiply the total amount of fuel per month you burn by the cost of a gallon or liter of gasoline to get your monthly fuel costs. If gas costs $4 per gallon ($1.05 per liter), you spend $128 per month on fuel, or 17 cents per mile (10 cents per km).
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Method 2
Method 2 of 3:

Maintenance and Insurance

  1. Divide this total by 12 to get the monthly total. If the total is, for example, $1,890 per year, the monthly cost for maintenance, repairs and insurance is $157.50 per month.
  2. If the total is $100 per year, the monthly cost is $8.33. [4]
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Method 3
Method 3 of 3:

Costs of Driving

  1. Add the monthly totals for fuel ($128 in our example); maintenance, repairs and insurance ($157.50 a month); and inspection and registration ($8.33) to see how much it costs to drive the automobile per month. In the hypothetical scenario we used, the cost to drive the fictional car per month would be $293.83 per month.
  2. Divide vehicle operation costs, $293.83 per month in our hypothetical scenario, by the distance you drive per month, 750 miles (1,207 km) in our example, to calculate the cost per mile. The cost per mile for this hypothetical driver and vehicle is 39.17 cents per mile or 24 cents per kilometer. [5]
  3. Note that the costs in this calculation do not include finance charges drivers pay to buy the vehicle, travel time, depreciation of the automobile's value, accidents, parking and tolls, and societal costs of taxes and other costs from factors such as road construction and pollution abatement. One website calculates the cost of driving the average car at $1.41 per mile (83 cents per km) with all costs factored in.
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Community Q&A

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  • Question
    I drive 140 miles round trip once a week. I get 30 miles to the gallon on gas. How much is it costing me?
    Community Answer
    in order to find out, you must provide the cost of gas per gallon for your state.
  • Question
    What is the cost to go 25 miles at 40 cents a mile?
    Community Answer
    You would spend $10 to make a 25 mile trip at $.40 per mile.
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      Tips

      • Many websites offer a free service where drivers can input various numbers into a calculation program to come up with the cost per mile to drive a vehicle. Do a web search for "calculate driving costs" or a similar term to find a website that calculates cost of driving for you. [6]
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