Car Petrol Consumption Calculator

Calculating your car's petrol consumption helps you understand fuel efficiency, plan trips, and save money. This calculator provides accurate estimates based on distance traveled and fuel purchased.

How to Use This Calculator

Using our car petrol consumption calculator is simple:

Enter the distance you traveled in kilometers or miles
Enter the amount of petrol you purchased in liters or gallons
Click "Calculate" to see your petrol consumption
Review the results and chart visualization

The calculator will show your petrol consumption in liters per 100 kilometers (L/100km) or miles per gallon (mpg) depending on your unit preferences.

Formula Explained

The petrol consumption is calculated using the following formula:

Petrol Consumption (L/100km) = (Fuel Purchased (L) / Distance Traveled (km)) × 100

For miles per gallon (mpg):

Petrol Consumption (mpg) = Distance Traveled (miles) / Fuel Purchased (gallons)

Assumptions

This calculator assumes you're using standard petrol (gasoline) and that your vehicle's fuel efficiency remains consistent during the trip. For more accurate results, consider using your car's manufacturer's fuel consumption figures.

Worked Example

Let's say you traveled 500 kilometers and purchased 40 liters of petrol. Here's how to calculate your petrol consumption:

Petrol Consumption = (40 L / 500 km) × 100 = 8 L/100km

This means your car consumes 8 liters of petrol for every 100 kilometers traveled.

Interpreting Results

Understanding your petrol consumption helps you:

Compare fuel efficiency between different vehicles
Identify opportunities to improve fuel economy
Plan longer trips with accurate fuel estimates
Save money by optimizing your driving habits

Typical petrol consumption ranges from 5-10 L/100km for modern cars, with higher consumption for older or less efficient vehicles.

Frequently Asked Questions

How accurate is this calculator?

This calculator provides an estimate based on the inputs you provide. For precise figures, consult your vehicle's manufacturer or fuel consumption label.

Can I use this for electric vehicles?

No, this calculator is specifically designed for petrol (gasoline) consumption. For electric vehicles, use our electric consumption calculator instead.

What units should I use?

You can use either kilometers and liters or miles and gallons. The calculator will automatically convert between units.