Horsepower Calculator based on vehicle weight and best ET.

Vehicle Weight (in lbs. with driver)
Best Quarter Mile E.T. (seconds)

RPM calculator

Gear Ratio Tire Radius MPH
RPM =

CFM Calculator: CFM needed

* 1.0 is a good estimate for a mild performance engine

Engine size (cid) Max RPM Volumetric Efficiency *
CFM Needed =

Horsepower From MPH Calculator:

1/4 Mile Speed (mph) Vehicle Weight (lbs.)   Horsepower

Liter/CID Conversions Calculator:

Liters Cubic Inches

Displacement Calculator:

Bore Stroke # of Cylinders
CID=

Miles per Gallon Calculator:

Miles Travelled Gallons Used   Miles Per Gallon

Kilometers per Liter Calculator:

Kilometers Travelled LitersUsed   Kms Per Liter