Guides
Fuel and driving cost guides
Step-by-step formulas, multiple worked examples, common mistakes, and practical limits for fuel cost, MPG, commuting, and road-trip planning.
Start with a guide that matches the question you are trying to answer. Each guide connects the arithmetic to a calculator so you can replace the examples with your own distance, vehicle economy, and fuel price.
How to Calculate Fuel Cost for a Road TripA step-by-step road trip fuel estimate using distance, MPG, and your expected pump price.How Much Does It Cost to Drive 100 Miles?Work out the fuel cost of 100 miles with examples at different MPG and gas prices.How to Calculate Gas Cost Per MileFind fuel expense per mile from US MPG and the price per US gallon.How to Calculate Fuel Cost From MPGTurn a US MPG figure into gallons used and estimated trip fuel expense.What Is MPG and How Is It Calculated?Learn what miles per gallon means and how to measure your own US MPG.How Much Gas Does a Road Trip Use?Estimate road trip gallons from trip distance and vehicle MPG before pricing the journey.How to Calculate Commute Fuel CostEstimate daily and monthly commute fuel expense without assuming a fixed work schedule.How to Compare Fuel Costs Between Two CarsCompare vehicle fuel expense using the same distance and price for each car.MPG vs L/100km: What's the Difference?Understand why MPG and L/100 km move in opposite directions and keep US and Imperial gallons distinct.