Fuel Consumption Calculator

Calculator

Enter Trip Details

Distance (miles)

Enter the distance traveled in miles.

Fuel Used (gallons)

Enter the amount of fuel used in gallons.

Preferred Unit

Miles per Gallon (MPG)

Liters per 100 km (L/100km)

1 Fuel Consumption Formulas

2 How to Calculate

3 Understanding Units

4 Practical Examples

Concept

Fuel Consumption Formulas

Fuel consumption can be calculated using these formulas:

Formulas:

MPG = Distance / Fuel Used

L/100km = (Fuel Used × 100) / Distance

Steps

How to Calculate

To calculate fuel consumption, follow these steps:

1
Fill up your fuel tank completely
2
Record your odometer reading
3
Drive normally until you need to refuel
4
Fill up again and note the amount of fuel used
5
Calculate the distance traveled and use the formula

Tips

Understanding Units

The calculator supports two common units for fuel consumption:

MPG (Miles per Gallon): Higher numbers indicate better fuel efficiency
L/100km (Liters per 100 kilometers): Lower numbers indicate better fuel efficiency

Tip:

For more accurate results, measure fuel consumption over longer distances and multiple fill-ups.

Examples

Practical Examples

Example 1 Highway Driving

A car travels 300 miles and uses 10 gallons of fuel.

MPG = 300 miles / 10 gallons = 30 MPG

L/100km = (10 gallons × 3.78541 L/gallon × 100) / (300 miles × 1.60934 km/mile) = 7.84 L/100km

Example 2 City Driving

A car travels 100 miles and uses 5 gallons of fuel.

MPG = 100 miles / 5 gallons = 20 MPG

L/100km = (5 gallons × 3.78541 L/gallon × 100) / (100 miles × 1.60934 km/mile) = 11.76 L/100km

Example 3 Mixed Driving

A car travels 200 miles and uses 8 gallons of fuel.

MPG = 200 miles / 8 gallons = 25 MPG

L/100km = (8 gallons × 3.78541 L/gallon × 100) / (200 miles × 1.60934 km/mile) = 9.41 L/100km