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Trip gas cost calculator
See what a drive will cost in gas before you go. Choose round trip or one way, and split the cost with your passengers.
Your trip's gas cost
$58.04 in gas
- Distance
- 500 mi
- Gallons needed
- 17.9
- Per person
- $58.04
- Cost per mile
- $0.12
Gas is usually the smaller half of what a car costs. Milebook tracks fuel, insurance, repairs and tolls together, so you see the real cost per mile.
Track every trip freeFree for 2 vehicles. No credit card.
How it's worked out
Gallons needed = trip miles ÷ your MPG. Gas cost = gallons × price per gallon. For a round trip the miles are doubled. Split between people, each pays the total divided by the number of people.
Getting a realistic number
Use your car's real MPG, not the sticker. Highway driving usually beats the city figure, while heavy loads, roof boxes and mountain roads cost more. Gas prices vary by region, so use what you're seeing at the pump.
What gas doesn't include
A trip also wears tires, brakes and oil, and adds miles that lower your car's value. That's why the IRS business rate (over 70¢ a mile) is far higher than the gas cost alone.
Questions
How much gas does a 100-mile trip use?
At 25 MPG, 4 gallons. At $3.25 a gallon that's $13.
Should I split gas or the IRS rate with passengers?
Most people split just the gas, which is what this calculator shows. The IRS rate covers the whole cost of running a car and is meant for business reimbursement.
Does it include tolls and parking?
No. Add those on top. Milebook can track tolls and parking alongside your fuel.
Tired of typing in receipts? Milebook's Smart Receipt Scanner reads your gas and repair receipts from a photo and fills in the entry for you, free. See how it works