MPG Calculator

• •Use the MPG Calculator when you need accurate results quickly without the risk of manual computation errors or unit conversion mistakes.
• •Use it to verify calculations made by hand or in spreadsheets — an independent check can catch errors before they lead to costly decisions.
• •Use it to explore how changing input parameters affects the output — a quick way to develop intuition and identify the most influential variables.
• •Use it when collaborating with others to ensure everyone is working from the same numbers and applying the same assumptions.

Miles per gallon (MPG) is the standard measure of fuel efficiency in the United States. The MPG Calculator determines your vehicle's real-world fuel economy by dividing the distance you drove by the amount of fuel you consumed. The EPA provides estimated MPG ratings for all new vehicles, but actual efficiency depends on driving habits, road conditions, vehicle maintenance, and weather. Tracking your MPG over multiple fill-ups gives you a reliable picture of your car's actual efficiency and helps you detect problems (a sudden drop in MPG can indicate maintenance issues). This calculator also converts to liters per 100 km, the metric standard used in most other countries.

• !Not filling the tank completely at each measurement, leading to inaccurate gallon readings.
• !Resetting the trip odometer at the wrong time (should reset when you fill up).
• !Comparing a single tank MPG to the EPA rating; average over 3-5 fill-ups for a reliable number.