What Is the Gas Cost Trip Calculator?
This calculator estimates how much you'll spend on fuel for a trip. Enter the distance you plan to drive, your vehicle's fuel efficiency in miles per gallon (MPG), and the current price per gallon. It instantly returns the total gas cost and the number of gallons you'll burn — perfect for budgeting a road trip, comparing routes, or splitting fuel costs with passengers.
How to Use It
1. Enter the trip distance in miles. 2. Enter your car's MPG (check your dashboard average or window sticker). 3. Enter the price per gallon at the pump. The result shows your total fuel cost and gallons needed. Try a few prices to see how rising gas affects your budget.
The Formula Explained
The math is simple: divide the distance by your MPG to find how many gallons you need, then multiply by the price per gallon.
$$\text{Gas Cost} = \frac{\text{Distance (mi)}}{\text{MPG}} \times \text{Price per Gallon (\$)}$$
For example, a 300-mile trip in a car that gets 25 MPG needs \(300 \div 25 = 12\) gallons. At $3.50 per gallon, that's \(12 \times \$3.50 =\) $42.00.
Worked Example
Suppose you drive 450 miles for a weekend getaway, your SUV averages 30 MPG, and gas costs $4.20/gal. Gallons needed = \(450 \div 30 = 15\). Total cost = \(15 \times \$4.20 =\) $63.00.
FAQ
What units does this use? Miles, MPG, and US dollars per gallon. Convert other units first if needed.
Should I use city or highway MPG? Use the figure closest to your trip — highway MPG for long drives, combined for mixed driving.
Does it include round trips? Enter the total distance you'll actually drive. For a round trip, double the one-way distance.
