Fuel required calculator
Know exactly how much to fill before you set off. Enter the distance and your mileage to see the litres you need, plus the cost.
How much fuel you need
The distance divided by your km/L gives the litres the trip will use. Multiply that by the fuel price for the cost. On long highway runs, keep a little extra in reserve for traffic and detours.
FAQs about fuel required
How much fuel do I need for a trip?
Divide the distance by your mileage. For a 100 km drive at 18 km/L you need 100 ÷ 18 = 5.56 litres.
How do I know my mileage?
Use the mileage calculator with the full-tank method, or check your recent fuel logs. Most petrol cars manage 15–20 km/L and diesel cars 18–25 km/L.
Should I add a buffer?
Yes. Traffic, detours, and air-conditioning raise consumption, so it is wise to keep 10–15% extra fuel in the tank, especially on highways with few pumps.
Does this work for a round trip?
Yes. Turn on the round trip option and the distance is doubled before the litres are worked out.
Can I use it for CNG?
Yes — enter your km/kg figure in place of km/L and the result will be in kg of CNG.
Why is my real consumption higher?
City driving, heavy loads, under-inflated tyres, and hard acceleration all cut efficiency, so you may use more fuel than the ideal figure suggests.