Calculator
Fuel Cost Calculator
Estimate trip fuel use, total fuel cost, and cost per passenger using metric or imperial fuel units.
Result
Estimated fuel used
41.67 L
Estimated total fuel cost
$75.00
Estimated cost per passenger
$37.50
How to use this calculator
What this calculator does
Estimate trip fuel use, total fuel cost, and cost per passenger using metric or imperial fuel units.
How to use it
Choose your unit system, enter trip distance, fuel efficiency, fuel price, and passengers, then review fuel used and estimated cost.
What the result means
Use the result as a direct calculation from the values you entered. If it looks off, check the inputs and formula shown on this page.
Browse more travel & location calculators for related estimates and comparisons.
Results are estimates for planning and education. Actual costs depend on exchange rates, local prices, taxes, fees, transport choices, accommodation terms, seasonality, visas, insurance, and personal spending habits.
Scenario guidance
When to use this
Use this when estimating the fuel cost of a road trip or shared drive.
Example scenario
Two friends are planning a 500 km weekend drive and want a simple estimate of fuel cost per person.
Inputs that usually matter most
- Trip distance, because it sets total driving distance.
- Fuel efficiency in distance per litre, which controls estimated fuel used.
- Fuel price and passengers, because they determine total and shared cost.
Common mistake to avoid
Do not use litres per 100 km in the fuel efficiency field; this calculator expects distance per litre.
How to interpret the result
Use fuel used, total cost, and cost per passenger as estimates, then adjust for traffic, terrain, driving style, fuel prices, tolls, and parking.
Results are estimates and are not travel, tax, legal, or financial advice.
Formula
Metric uses kilometres, km/L, and price per litre. Imperial uses miles, mpg, and price per gallon. Total fuel cost multiplies fuel used by the matching fuel price, then divides by passengers for cost sharing.
Example fuel cost
A 500 km trip at 12 km/L uses about 41.67 litres. At $1.80 per litre, fuel costs about $75, or $37.50 each for two passengers.
Frequently Asked Questions
What fuel efficiency format should I enter?
Enter distance per litre, such as 12 km/L. Do not enter litres per 100 km without converting it first.
What if passengers is zero?
The calculator shows cost per passenger as undefined because at least one passenger is needed for a shared-cost estimate.
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