Fuel Cost Calculator

Planning a road trip or just trying to survive the commute without spending your rent money on gas? Our fuel cost calculator does the math so you can afford snacks.

What this calculator does

• Trip Cost: Estimate exactly how much cash you need for gas.
• Efficiency: Calculate your actual MPG (Miles Per Gallon).
• Comparisons: See if driving 10 miles out of your way for cheaper gas is actually worth it.

The Formula

$\text{Fuel Cost} = (\text{Distance} / \text{MPG}) \times \text{Price per Gallon}$

• Metric: $(\text{Distance} / 100) \times \text{L/100km} \times \text{Price per Liter}$.

Unlike math class, here's what that means

If you drive a truck that gets 15 MPG and gas is $4.00, every mile costs you 27 cents. If you drive a hybrid getting 50 MPG, every mile costs you 8 cents. That 100-mile road trip? $27 vs $8.

Example Calculation

You're driving 300 miles. Your car gets 25 MPG. Gas is $3.50/gal.

1. Fuel Needed: $300 / 25 = 12 \text{ gallons}$.
2. Cost: $12 \times 3.50 =$42.00$.

Did You Know? 💡

• The "Sweet Spot": Most cars are most efficient between 55-60 mph. Driving 80 mph can consume 25% more fuel due to wind resistance. It's like paying an extra dollar per gallon just to arrive 5 minutes early.
• Idling: Idling for more than 10 seconds uses more fuel than restarting your car.
• The First Hybrid: The Toyota Prius wasn't the first hybrid—Ferdinand Porsche built a gas-electric hybrid car in 1900!

Expert Insight

Hypermiling: This is the art of driving for maximum efficiency. Hardcore hypermilers draft behind trucks (dangerous, don't do it) and over-inflate tires (bumpy ride). Practical Tip: The single best way to save gas is to drive like you have an open cup of coffee on the dashboard. Smooth acceleration and braking can improve MPG by 30%.

Why this matters

Gas prices fluctuate wildly. Knowing your "Cost Per Mile" helps you budget better than just looking at the pump total. It also settles arguments about splitting gas money.

Frequently Asked Questions

Is "Premium" gas worth it? Only if your car requires it. Putting premium in a regular Civic does not improve MPG or power. It just burns money.

What is MPGe? "Miles Per Gallon Equivalent." It allows electric cars (EVs) to be compared to gas cars. 33.7 kWh of electricity contains the same energy as 1 gallon of gas. A Tesla Model 3 gets roughly 130 MPGe.

Does AC waste gas? Yes, but at highway speeds, opening the windows creates so much "drag" that using AC is actually more efficient.

Related Calculators

• Unit Converter: MPG to L/100km.
• Scientific Calculator: For complex trip splitting.

Disclaimer: Your actual mileage may vary based on how heavy your foot is.