Question 1

How do I estimate trip fuel cost?

Accepted Answer

Enter trip distance, fuel economy (mpg or L/100 km), and fuel price. The calculator multiplies gallons/liters needed by price.

Question 2

What is the difference between mpg and L/100 km?

Accepted Answer

mpg is distance per volume (higher is better). L/100 km is volume per distance (lower is better).

Question 3

How accurate is the estimate?

Accepted Answer

Traffic, speed, AC usage, terrain, and payload affect real economy. Use your car's recent average for best accuracy.

Question 4

Can I include multiple legs or stops?

Accepted Answer

Yes, add segments with different distances, speeds, or prices and the tool totals the cost.

Question 5

Does cruise speed affect fuel use?

Accepted Answer

Yes—higher speeds increase aero drag; economy often drops above 60-70 mph (100-115 km/h).

Fuel Cost Calculator