How to Calculate a Car's Fuel Consumption per 100 Kilometers?
3 Answers
Divide the amount of money spent on refueling by the price per liter of fuel to determine how many liters of fuel were added. Then, divide this figure by the number of kilometers driven before the next refueling to get the fuel consumption per kilometer. Multiply this by 100 to obtain the fuel consumption per 100 kilometers. Below are some fuel-saving methods for vehicles: 1. Control RPM: The engine's RPM is a crucial factor affecting fuel consumption. Generally, for fuel-injected cars, maintaining RPM between 2,200 and 2,500 is more fuel-efficient. Too low RPM can lead to insufficient power, increased fuel consumption, and potential engine damage. 2. Maintain Speed: Speed is another key factor in determining fuel consumption. For small-displacement family cars, keeping speed between 60 km/h and 80 km/h results in lower fuel consumption. For mid-displacement cars, speeds between 80 km/h and 100 km/h are more fuel-efficient.
I'm a new driver and find calculating fuel consumption quite simple. Every time before refueling, I go to the gas station and fill up until the pump automatically stops, noting down the current odometer reading in kilometers. After driving a few hundred kilometers when the fuel is low, I return to the same gas station to fill up again. This time, I check how many liters of fuel were added and the new odometer reading. The distance traveled is the new odometer reading minus the old one. Then, the formula is: liters of fuel added divided by distance traveled multiplied by 100. For example, if 30 liters were added after driving 400 kilometers, the fuel consumption would be (30/400)*100=7.5 liters per 100 kilometers. This method works well for daily driving, and I recommend calculating it several times to get an average, avoiding large errors from a single calculation. Remember to drive smoothly, brake less, and avoid sudden acceleration to get a more accurate reflection of your driving habits. City driving with frequent stops and starts tends to have higher fuel consumption, while highway driving can be more economical. Manual recording throughout the journey is best, as the car's dashboard readings can sometimes be inaccurate and need to be verified with your own experience.
I've been driving for half my life, so I know exactly how to calculate fuel consumption. Fill up the tank, note the mileage, run it down to half a tank, refuel, note the amount of fuel used, divide by the distance traveled, and multiply by 100—done. But driving style has a huge impact. In the city with frequent traffic lights, aggressive acceleration and braking can easily push consumption up to over 10 liters per 100 km. On the highway, maintaining a steady speed of 60 to 80 km/h can drop it to around 6 liters. For accurate calculations, measure consumption over mixed routes 3-5 times and take the average. Low tire pressure or blasting the AC can add 0.5 to 1 liter. Short trips in winter with cold starts burn even more fuel. Don’t just calculate under ideal conditions—test different road conditions to get a true picture of your car’s performance. It’ll also teach you how to optimize your driving habits and save money.
