Fuel Cost Calculator

Whether you are planning a road trip, tracking monthly fuel expenses, or comparing petrol vs diesel costs, our Fuel Cost Calculator on Diztool gives you an accurate answer in seconds. How to Use: 1. Enter the trip distance in kilometres or miles. 2. Enter your vehicle fuel efficiency — litres per 100km, km per litre, or miles per gallon. 3. Enter the current fuel price per litre or gallon. 4. Click Calculate to see the estimated fuel cost for the trip. 5. Use the round trip toggle to double the distance automatically. Fuel Efficiency Units: Litres per 100km (L/100km) — Standard in most countries including India, Europe, and Australia. Lower is better. Kilometres per litre (km/L) — Common in Asia and South America. Higher is better. Miles per gallon (MPG) — Standard in the United States and United Kingdom. Higher is better. The tool converts between units automatically so you can mix and match inputs. Factors affecting real-world fuel consumption: Speed: Fuel consumption rises sharply above 90 to 100 km/h due to aerodynamic drag. Load: Heavier loads increase fuel use. Roof racks and trailers add significant drag. Tyre pressure: Under-inflated tyres increase rolling resistance and fuel use by up to 3 percent. Air conditioning: AC can increase fuel consumption by 5 to 20 percent in city driving. City vs highway: Stop-start city driving uses significantly more fuel per km than steady highway driving. Tip for road trips: Enter the one-way distance, check the round trip toggle, and see your total fuel budget before you leave.