Road Trip Cost Calculator
Fuel, tolls and time for a driving trip.
Enter your values
Enter the one-way distance in miles.
Choose one of: One way, Round trip.
Enter the fuel economy in mpg.
Enter the fuel price in $/gal.
Enter the average speed in mph.
Enter the tolls and parking in $.
Enter the people sharing costs you are working with.
Results update instantly as you type — no submit needed. Your values are remembered on this device, and the shareable link reopens the calculator with exactly these numbers.
- Total cost
- $178.69
- Fuel cost
- $133.69
- Fuel used
- 38.8 gallons
- Cost per person
- $59.56
- Driving time
- 20h 0m
- Cost per mile
- $0.14
Working
- 1Fuel = (1,240 ÷ 32) × $3.45 = $133.69
Quick answer
Fuel cost equals distance divided by fuel economy, multiplied by the price per gallon or litre.
Fuel cost = (distance ÷ mpg) × price
At a glance
| What it does | Fuel, tolls and time for a driving trip. |
|---|---|
| Category | Travel |
| Inputs needed | One-way distance, Trip type, Fuel economy, Fuel price, Average speed, Tolls and parking, People sharing costs |
| Main output | Total cost |
| Formula | Fuel cost = (distance ÷ mpg) × price |
| Cost | Free — no sign-up, no download |
How to use the Road Trip Cost Calculator
- 1Enter the one-way distance and pick one-way or round trip.
- 2Enter your car's fuel economy and local fuel price.
- 3Add tolls and the number of people sharing.
Inputs explained
- One-way distance(miles)
- Enter the one-way distance in miles.
- Trip type
- Choose one of: One way, Round trip.
- Fuel economy(mpg)
- Enter the fuel economy in mpg.
- Fuel price($/gal)
- Enter the fuel price in $/gal.
- Average speed(mph)
- Enter the average speed in mph.
- Tolls and parking($)
- Enter the tolls and parking in $.
- People sharing costs
- Enter the people sharing costs you are working with.
Worked example
Using the values the calculator loads with:
Inputs
- One-way distance620 miles
- Trip typeRound trip
- Fuel economy32 mpg
- Fuel price3.45 $/gal
- Average speed62 mph
- Tolls and parking45 $
- People sharing costs3
Results
- Total cost$178.69
- Fuel cost$133.69
- Fuel used38.8 gallons
- Cost per person$59.56
- Driving time20h 0m
- Cost per mile$0.14
- Fuel = (1,240 ÷ 32) × $3.45 = $133.69
Frequently asked questions
Does speed change fuel cost?
Yes. Most cars lose 10–15% efficiency going from 65 to 80 mph, and drag rises with the square of speed.
Should I include depreciation?
For a true cost, add about 10–20 cents per mile for wear, tyres and maintenance.
What do I need to enter into the Road Trip Cost Calculator?
Just 7 values: one-way distance, trip type, fuel economy, fuel price, average speed, tolls and parking, people sharing costs. Every field starts with a realistic example, so you can change one number at a time and watch the result update instantly.
How does the Road Trip Cost Calculator work out the answer?
Fuel cost equals distance divided by fuel economy, multiplied by the price per gallon or litre. It applies the formula Fuel cost = (distance ÷ mpg) × price and shows the working so you can check each step by hand.
Is the Road Trip Cost Calculator free, and do I need an account?
It is completely free with no sign-up, no download and no usage limit. Everything is calculated in your browser, so the numbers you type never leave your device.
Results are estimates for general information. For medical, legal, structural or financial decisions, confirm with a qualified professional.