Fuel Cost Calculator
Calculate how much gas you'll need and what it will cost for your trip
How to Use This Fuel Cost Calculator
- Enter your trip distance in miles or kilometers
- Input your vehicle's fuel efficiency (MPG, L/100km, or km/L)
- Enter current fuel price per gallon or liter
- Toggle 'Round Trip' if calculating both ways
- Click calculate to see fuel needed, total cost, and cost per mile
Example: A 500-mile road trip in a car getting 28 MPG with gas at $3.50/gallon costs $62.50 one way or $125 round trip. That same trip in a 20 MPG SUV costs $87.50 one way - $50 more round trip.
Tip: Compare rental car options by calculating total fuel costs for your trip - a fuel-efficient compact often costs less overall than a 'cheaper' SUV rental.
Why Use a Fuel Cost Calculator?
Knowing fuel costs helps budget for trips, compare vehicle options, and understand true transportation expenses.
- Budget accurately for road trips and vacations
- Calculate daily commute costs when considering a job offer
- Compare driving vs flying costs for medium-distance travel
- Estimate delivery or rideshare driving profitability
- Evaluate hybrid or EV cost savings for your driving patterns
- Split fuel costs fairly among carpooling passengers
Understanding Your Results
Results show gallons/liters needed, total cost, and cost per distance unit.
| Result | Meaning | Action |
|---|---|---|
| Under $0.10/mile | Very efficient | Typical for hybrids, EVs, or efficient compacts |
| $0.10-0.15/mile | Moderate | Average for midsize sedans and small SUVs |
| $0.15-0.25/mile | Higher cost | Typical for trucks, large SUVs, and sports cars |
| Over $0.25/mile | Expensive | Very inefficient vehicles or high fuel prices |
Meaning: Very efficient
Action: Typical for hybrids, EVs, or efficient compacts
Meaning: Moderate
Action: Average for midsize sedans and small SUVs
Meaning: Higher cost
Action: Typical for trucks, large SUVs, and sports cars
Meaning: Expensive
Action: Very inefficient vehicles or high fuel prices
Note: Fuel costs are just one component of driving expenses. IRS 2026 standard mileage rate of $0.70/mile includes depreciation, insurance, and maintenance.
About Fuel Cost Calculator
Formula
Fuel Cost = (Distance / MPG) x Price per Gallon For metric: Fuel Cost = (Distance in km x L/100km / 100) x Price per Liter. Our calculator converts between systems automatically.
Current Standards: EPA fuel economy ratings assume 55% highway, 45% city driving. Real-world mileage varies by 10-20% based on driving conditions and style.
Frequently Asked Questions
What's the current national average gas price?
As of early 2026, US regular gasoline averages approximately $3.40/gallon. California is highest at around $4.80/gallon, while Texas, Oklahoma, and Gulf states are lowest at $2.90-3.10/gallon. Prices typically rise in summer (driving season) and fall in winter. Premium gas costs $0.50-0.80 more per gallon.
Is it cheaper to drive or fly?
For a 500-mile trip: driving costs about $60-80 in fuel alone. Add $100-150 for car costs (IRS rate), plus 8+ hours of time. Flying might cost $150-300 but takes 2-3 hours. For solo travelers, flying often wins for 400+ miles. For families, driving is usually cheaper since car costs are shared. Consider tolls, parking, and rental car needs at your destination.
How much does a 2,000 mile road trip cost?
At 28 MPG and $3.40/gallon: about $243 in fuel. A full-size SUV at 18 MPG: $378 in fuel. Add lodging, food, tolls, and vehicle wear (roughly $0.30/mile for maintenance/depreciation) and a 2,000-mile trip typically costs $600-1,200 depending on vehicle and travel style. That's often comparable to or more than airfare for two people.
Should I buy premium gas for better mileage?
No, unless your car specifically requires it. Premium gas in a car designed for regular provides no benefit - you're just paying 20-25% more. Cars requiring premium may suffer from knock, reduced performance, or engine damage with regular. Check your owner's manual: 'premium required' means you must use it; 'premium recommended' means you can use regular with slightly reduced performance.
How do I calculate fuel cost for an electric vehicle?
EVs use kWh instead of gallons. The average EV uses about 0.30 kWh/mile. At $0.16/kWh home charging, that's about $0.048/mile - roughly 75% cheaper than a 30 MPG car at $3.40/gallon ($0.113/mile). A 500-mile EV trip costs about $24 vs $57 for gas. DC fast charging costs more ($0.30-0.40/kWh), reducing savings to 40-50%.