# Cylinder Retraction Speed Calculator

Calculate the retraction speed of a cylinder with this Cylinder Speed Calculator.

## How do you calculate the retraction speed of a cylinder?

To find the retraction speed of a cylinder, use this

cylinder retraction speed formula:

Cylinder Rod Retraction Speed (Inches/Minute) = ( 231 x Q ) / Annulus

Area

Q = Flow Rate in Gallons per Minute

Annulus Area = Piston Area - Rod Area

A cylinder with a piston diameter of 4 inches, rod diameter of 2 inches,

and a flow rate of 10 Gallon/Minute into the rod end has a retraction

speed of:

Retraction Speed = ( 231 x 10 ) / (12.5664-3.1416)

Retraction Speed = 245.0980 inches/minute or 4.0850 inches/second

(rounded to the nearest
10,000th)