How to Calculate Fuel Consumption?

[OHector]

Automobile fuel consumption is generally calculated based on a hundred kilometers. The calculation formula is: fuel consumption per 100 kilometers = fuel consumption in liters divided by driving distance in kilometers multiplied by 100. However, fuel consumption calculation is not absolute, as it is related to individual driving habits, vehicle load, and road conditions. More methods for calculating automobile fuel consumption are as follows: 1. Search for a fuel consumption calculator in a browser. 2. First, input the total kilometers driven since the last full tank of fuel, or the kilometers driven after the last refueling. Accurate data can be obtained by checking the odometer. 3. Input the fuel tank capacity or the amount of fuel added, depending on your actual situation. 4. Then input the fuel price at the time of refueling, based on the actual amount paid. 5. Click calculate to get the fuel consumption result.

[Brady]

Having driven for over a decade, calculating fuel consumption is actually quite simple. The most common method is to fill up the tank, reset the trip meter, drive 200-300 kilometers, then refill to full. For example, if you add 25 liters of fuel on the second fill-up after driving 300 kilometers, divide 25 by 3 to get 8.3 liters per 100 kilometers. Installing a fuel consumption app on your phone makes it even easier—just input the data each time you refuel, and it calculates automatically. The key is to use the same fuel pump for full fills. Winter fuel consumption tends to be 1-2 liters higher than in summer, and new cars in the break-in period may also show inflated consumption. Maintaining steady throttle on highways saves the most fuel, while frequent braking in city driving can easily push consumption above 10 liters per 100 kilometers. Regularly calculating this way helps you understand your car's true fuel appetite.

[SanStephanie]

Last time a friend asked about this, I taught him to use the odometer to assist in calculations. First, record the mileage before refueling, say 5,000 kilometers, and fill up with 300 yuan worth of fuel. Wait until the fuel light comes on next time and check the mileage again, for example, it reaches 5,360 kilometers, and 30 liters of fuel were used during this period. Divide the distance traveled, 360 kilometers, by 30 liters, and the fuel consumption per 100 kilometers is (100÷12)×30=8.33 liters. Note that when the fuel light comes on, there are about 8 liters left in the tank, so don't wait until it's completely empty to refuel. Different road conditions make a big difference; city driving consumes 30% more fuel than highway driving, and using the air conditioning can burn an additional liter of fuel. Calculate it once a month; the number displayed by the onboard computer is only a reference, and the actual consumption is always about 0.5 liters more.

[NathanMarie]

I remember being really nervous the first time I calculated fuel consumption. Filled the tank until the pump clicked off, noted the mileage. After a week of normal driving, refueled to the click again to see how many liters were added. Divide the fuel amount by the distance traveled, then multiply by 100. For example, 22 liters over 250 km equals 8.8L/100km. The key is using the same refueling method, as pump pressure varies between stations affecting accuracy. New cars consume 0.5-1L more in winter cold. Keep tires at 2.3-2.5bar for optimal economy - underinflation increases consumption.

[DelAsher]

Once a mechanic taught me a simple method: fill up with 200 yuan worth of 95# gasoline, noting the price per liter, say 8 yuan/liter, which equals 25 liters. After running through this tank, record the mileage and calculate using 25 ÷ kilometers × 100. The key is to stick to the same fuel grade, as the difference in fuel consumption between 92 and 95 can be up to 5%. The first 3 kilometers after startup consume the most fuel, so calculating based on single short trips under 3 kilometers can give inflated results. It's best to accumulate over 300 kilometers before calculating. Manual transmissions are more fuel-efficient than automatics, but the difference is less than 1 liter. Coasting in gear downhill saves more fuel than coasting in neutral. Taking the average of three calculations using this method yields the most accurate result.