Estimate fuel spending for a District of Columbia car from mileage, efficiency and fuel price.
Fuel spending for a District of Columbia car: annual miles ÷ efficiency gives gallons used, which multiplies by the fuel price to get yearly and monthly cost.
Cost
Cost = miles ÷ mpg × price
Estimate.
Divide miles between fill-ups by gallons added; dashboard estimates often run high.
Rates are approximate reference values. Local rates, exemptions and rules can differ, so treat the output as a planning figure only.