AllsquareRoad trip gas money calculator
Miles, mpg and the gas price in; what each person in the car owes out.
Free. No account. Nothing to install.
A worked example: 280 miles each way, three people
Three friends drive 280 miles to a lake and back, in a car that gets 28 miles per gallon. Gas is $3.40 a gallon, and parking and a toll come to $12.00.
- Distance: 280 miles there and back is 560 miles.
- Gas used: 560 miles ÷ 28 mpg is 20 gallons.
- Gas cost: 20 gallons × $3.40 is $68.00.
- With $12.00 in tolls and parking, the drive costs $80.00.
- Split three ways: $26.67, $26.67, $26.66. The amounts add up to exactly $80.00.
Does the driver pay a share? In this example they do: the gas is for everyone's trip. If your group wants the driver to ride free for doing the driving, count one person fewer.
For the rest of the trip's costs, use the trip cost calculator before you go, and the trip splitter once people start paying.
How to use it
- Step 1Type the distance one way, and tick round trip if you're coming back.
- Step 2Type the car's miles per gallon and the price of gas.
- Step 3Add tolls and parking, if any.
- Step 4Type how many people are splitting it.
Questions
How do you calculate gas money for a road trip?
Divide the miles by the car's miles per gallon to get gallons, multiply by the price per gallon, add tolls and parking, and divide by the number of people.
Where do I find my car's mpg?
Your car's trip computer often shows it, or look up the highway figure for your model. Highway driving usually gets better mileage than city driving.
Should the driver pay for gas too?
That's up to your group. Many split it evenly including the driver; some let the driver ride free. Change the number of people to match.
What about wear on the car?
This calculator counts gas, tolls and parking. If your group wants to add something for the car, add it to tolls and parking.
Is anything saved?
No. The numbers stay on this page in your browser.