How to Calculate Fuel Cost
The formula: Fuel Cost = (Distance / MPG) x Gas Price. First divide your trip distance by your vehicle's MPG to get gallons needed, then multiply by the price per gallon.
Average Gas Prices by Region (US)
| Region | Regular | Mid-Grade | Premium |
|---|---|---|---|
| West Coast | $4.20 - $5.00 | $4.50 - $5.30 | $4.80 - $5.60 |
| Northeast | $3.30 - $3.80 | $3.70 - $4.20 | $4.10 - $4.60 |
| Southeast | $2.90 - $3.40 | $3.30 - $3.80 | $3.70 - $4.20 |
| Midwest | $3.00 - $3.50 | $3.40 - $3.90 | $3.80 - $4.30 |
| Gulf Coast | $2.80 - $3.30 | $3.20 - $3.70 | $3.60 - $4.10 |
Fuel-Efficient Driving Tips
- Drive 55-60 mph on highways — fuel efficiency drops significantly above 60 mph. Every 5 mph over 50 is like paying an extra $0.20-$0.30 per gallon.
- Avoid idling — turn off the engine if you will be stopped for more than 30 seconds. Idling burns 0.25-0.50 gallons per hour.
- Plan your route — fewer stops, less traffic, and highway miles all improve fuel economy vs. city driving.
- Use the correct fuel grade — unless your engine requires premium, regular unleaded is fine. Premium in a regular-fuel car wastes money with no benefit.
FAQ
Is it cheaper to drive or fly?
For solo travel, driving is usually cheaper up to about 300-400 miles. Beyond that, flying often wins on time and cost. With 2+ passengers, driving becomes more economical up to 600+ miles since you split gas costs.
Does AC affect fuel cost?
Yes. Air conditioning can reduce MPG by 3-10%, especially in city driving. At highway speeds, AC is often more efficient than open windows (which create aerodynamic drag).