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Engine Idling Cost Calculator - Calculate Gas Wasted While Idling

Engine idling wastes more fuel and money than most drivers realize. Our idling cost calculator helps you understand exactly how much you're spending when your vehicle sits running with the engine on. Whether you're waiting in a drive-through, warming up your car, or stuck in traffic, idling costs add up quickly. This calculator uses industry-standard formulas based on engine size to estimate fuel consumption during idle time and calculate the associated costs. You'll also see a comparison with the cost to restart your engine, helping you make informed decisions about when to turn off your vehicle during stops. Modern engines are designed for frequent starts, and turning off your engine for stops longer than 10 seconds typically saves both fuel and money while reducing environmental impact. Plan smarter pauses with MeetingTime Pro and map EV-friendly alternatives using ElectricRoutePro.

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Disclaimer: Idling costs are estimates based on industry averages. Actual costs may vary based on vehicle condition, engine type, and other factors.

How to Use This Calculator

  1. Enter how long your engine typically idles (in minutes)
  2. Enter your current fuel price per gallon
  3. Select your engine size category
  4. See your idling cost and compare it to restart cost
  5. Make informed decisions about when to turn off your engine

General Rule of Thumb

If you're going to be stopped for more than 10 seconds, it's generally more fuel-efficient to turn off your engine and restart it when you're ready to move.

Note: Modern vehicles are designed for frequent starts. The myth that restarting uses more fuel than idling is outdated.