Fuel Economy Calculator

Calculate MPG, track fuel costs, compare vehicles, and discover your potential savings. Get detailed insights into your vehicle's efficiency and environmental impact.

Calculate Fuel Economy

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Amount of fuel consumed

MPG Efficiency Guide

Outstanding50+ MPG
Excellent40-49 MPG
Very Good30-39 MPG
Good25-29 MPG
Average20-24 MPG
Poor<20 MPG

Fuel-Saving Tips

Maintain steady speeds, use cruise control
Keep tires properly inflated (+3% MPG)
Remove excess weight and roof racks
Avoid aggressive acceleration/braking
Plan routes to avoid traffic and hills

National Averages

Regular Gas$3.25/gal
Premium Gas$3.85/gal
Diesel$3.55/gal
*Average prices, varies by location

Everything You Need to Know About Fuel Economy

Why MPG Really Matters

Here's the deal - fuel economy isn't just about saving a few bucks at the pump. A difference of just 5 MPG can save you hundreds or even thousands of dollars per year. If you drive 12,000 miles annually, improving from 20 to 25 MPG saves you 120 gallons of gas yearly.

At $3.50 per gallon, that's $420 in your pocket every year. Over the life of your car? We're talking serious money. Plus, you're helping the environment - that's 2,400 pounds less CO₂ in the atmosphere annually.

The Truth About Real-World MPG

  • • EPA ratings are tested in labs - expect 10-20% lower in real driving
  • • City driving typically gets 20-30% worse MPG than highway
  • • Cold weather can reduce MPG by up to 20% in short trips
  • • Aggressive driving can lower MPG by 33% on highways
  • • AC use decreases fuel economy by 5-25% depending on conditions

Smart Ways to Maximize Your Fuel Economy

Driving Habits

Smooth acceleration and braking can improve MPG by up to 20%. Think of the accelerator like an egg under your foot.

Regular Maintenance

Clean air filters, proper oil, and tuned engines can improve MPG by 4-10%. It's like giving your car a breath of fresh air.

Smart Planning

Combine errands into one trip. Several short trips from cold starts use twice as much fuel as one longer trip.

Vehicle Choice

Every 100 pounds of extra weight reduces MPG by 1%. That ski rack? It's costing you 25% on the highway.

Real Questions, Straight Answers

Why is my actual MPG lower than the sticker said?

EPA tests are done in perfect conditions - no wind, ideal temperature, professional drivers. Real life has traffic, weather, and your lead foot. Expect 10-20% lower than the sticker, especially if you do mostly city driving or live somewhere with extreme weather.

Is premium gas worth it for better MPG?

Unless your car specifically requires premium (check your manual or gas cap), you're wasting money. Premium gas in a regular car doesn't improve MPG or performance - it's like feeding a house cat gourmet food. They don't know the difference, and neither does your engine.

How much does idling really waste?

More than you think! Idling for just 10 minutes a day wastes about 22 gallons per year. That's $77 literally going up in smoke. If you're stopped for more than 10 seconds (except in traffic), turn off the engine. Modern cars don't need to "warm up" by idling either.

Should I buy a hybrid to save on gas?

Do the math first! If a hybrid costs $5,000 more but saves you $500/year in gas, it'll take 10 years to break even. But if you drive a lot (20,000+ miles/year) or gas prices spike, hybrids can pay off much faster. Plus, there's the environmental benefit to consider.

Pro Tips Most People Don't Know

The Sweet Spot Speed

Most cars get their best MPG between 45-65 mph. Every 5 mph over 60 is like paying an extra $0.24 per gallon. At 80 mph, you're using 25% more fuel than at 60 mph. Physics doesn't care if you're late - air resistance increases exponentially with speed.

The First Mile Problem

Your car uses 20% more fuel in the first mile when the engine is cold. That's why five 2-mile trips use way more gas than one 10-mile trip. Pro tip: Do your furthest errand first to warm up the engine, then hit the closer stops on the way back.

Money-Saving Reality Check: Improving your MPG by just 5 points saves the average driver $300-500 per year. That's a car payment, a weekend getaway, or a really nice dinner out every month. Small changes in how you drive can make a real difference in your wallet.