Question 1

How do I calculate gas cost for a trip?

Accepted Answer

Multiply the trip distance by your car’s fuel consumption rate, then multiply by the gas price. For example: a 300-mile trip at 25 MPG uses 12 gallons. At $3.50/gallon, the cost is 12 × $3.50 = $42.

Question 2

How many gallons of gas will I use?

Accepted Answer

Gallons used = distance ÷ MPG. For a 400-mile trip in a car averaging 30 MPG, you would use 400 ÷ 30 ≈ 13.3 gallons.

Question 3

What if my car uses liters per 100km?

Accepted Answer

Select metric mode. Enter distance in km, your car’s consumption in L/100km, and the fuel price per liter. The calculator handles the conversion automatically.

Question 4

How accurate is the gas cost estimate?

Accepted Answer

The estimate assumes steady fuel efficiency. Real costs vary with traffic, speed, terrain, AC use, and vehicle condition. City driving typically uses 10-20% more fuel than highway driving.