Fuel Calculator
Calculate trip cost, your vehicle's average fuel consumption, and total fuel expenses.
The fuel calculator helps plan trips and track vehicle consumption. In "Trip cost" mode, enter the distance, your car's average consumption, and the fuel price to find out how many liters you'll need and the total cost. In "Average consumption" mode, enter the distance traveled and the liters filled to calculate your vehicle's actual consumption.
How to use
- Choose between calculating a trip's cost or your vehicle's average consumption.
- Fill in the fields matching the chosen mode.
- Watch the result update automatically as you type.
Worked example
Picture a 450 km trip in a car that averages 13 km/l, with fuel at $5.89 per liter. In "Trip cost" mode, the calculator divides 450 by 13 to get about 34.6 liters, which multiplied by $5.89 comes to roughly $203.90 of fuel for the journey — handy for splitting costs with friends or deciding whether driving beats taking the bus.
Frequently asked questions
How do I calculate the cost of a road trip?
Divide the distance by the vehicle's average consumption to find how many liters will be used, then multiply by the fuel price. For example, a 300 km trip with a car that does 12 km/l and fuel at $5.50 uses 25 liters, costing $137.50.
How do I calculate my car's average consumption?
Divide the distance traveled by the amount of fuel filled over the same period. If you drove 400 km using 32 liters, the average consumption is 12.5 km/l.
What does consumption in l/100km mean?
It's another common way to express fuel consumption, used in many countries: how many liters of fuel are needed to travel 100 km. The lower the number, the more efficient the vehicle — the opposite of km/l, where higher is better.
How do I know whether ethanol or gasoline is cheaper to run?
A common rule of thumb is that ethanol pays off when its price is at or below 70% of gasoline's, since it yields fewer kilometers per liter. Compare the per-liter price of both at the pump and use the calculator with your car's consumption on each fuel for a more precise answer.
Is my car's real consumption the same as the manufacturer's figure?
Almost never. Consumption depends on driving style, traffic, air-conditioning use, tire pressure, and route type (city vs. highway). That's why this calculator's "Average consumption" mode, which uses your real fill-up data, tends to be more accurate than the spec-sheet number.
Should I measure city and highway consumption separately?
Yes, for more accurate estimates. Highway consumption is usually much better than city driving, which has more stopping and accelerating. Measuring each separately helps you plan mixed trips more realistically.