fuel_pump Fuel Cost Calculator
Calculate your trip fuel costs before you drive. Know exactly how much you will spend on gas for any journey based on your vehicle's fuel efficiency.
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Frequently Asked Questions - Fuel Cost Calculator
How can I improve my fuel efficiency?
Maintain proper tire pressure, reduce excess weight, drive at steady speeds (optimal is 50-65 mph), use cruise control on highways, avoid aggressive acceleration and braking, keep your engine tuned, and remove roof racks when not in use.
Is it cheaper to drive with windows down or AC on?
At low speeds (under 40 mph), windows down is more efficient. At highway speeds, the aerodynamic drag from open windows outweighs the energy used by AC, so use AC. Modern cars have efficient AC systems that minimize the fuel penalty.
How do I convert between MPG and L/100km?
To convert MPG to L/100km: divide 235.215 by the MPG value. For example, 30 MPG = 235.215 / 30 = 7.84 L/100km. To convert L/100km to MPG: divide 235.215 by the L/100km value. These formulas use the US gallon (3.785 liters).
How much does idling cost in fuel?
An idling car typically burns 0.2-0.5 gallons per hour depending on engine size. If you idle for 10 minutes a day, that can waste over 20 gallons per year. Modern start-stop systems help reduce this waste by shutting off the engine when stationary.
What is the most fuel-efficient speed to drive?
Most vehicles achieve peak fuel efficiency between 50-65 mph (80-105 km/h). Fuel economy drops significantly above 65 mph. For every 5 mph above 65, you can lose about 7-10% in fuel efficiency. Planning routes to maintain steady speeds helps maximize economy.
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