Miles-Per-Gallon Estimation Calculations By Bowling & Grippo

The following calculates the estimated miles-per-gallon fuel consumption, based on the aerodynamic horsepower equilibrium occuring when propelling a vehichle with the given coefficient of drag, frontal area, tire pressure, brake-specific fuel consumption, and speed. The default speed of 55 MPH corresponds to the calculation used by the EPA to estimate fuel consumption. A value for drivetrain horsepower loss is also provided. To aid in the program usage, a chart of drag coefficients is provided.


Program Inputs:

Coefficient of drag:

Frontal Area (Square Feet):

Vehicle Miles Per Hour (MPH):

Vehicle Weight in Lbs:

Tire Inflation Pressure in psi:

Engine Brake Specific Fuel Consumption (gal/hr-hp):

Drivetrain Horsepower Loss:


Press this button to submit a computation: .

To reset the form input: .


Bruce Bowling
Al Grippo