Hydraulic Cylinder Calculator

Inputs

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Inside diameter of the cylinder barrel (the piston diameter).
mm
Piston-rod diameter. Subtracted from the piston area on the pull (retract) stroke.
mm
Working hydraulic pressure.
bar
Derates theoretical pressure × area for seal friction and pressure losses. Use 100 for ideal force.
%
Push (extend, full bore) or pull (retract, annulus area).
Oil flow into the cylinder — used for the stroke speed.
L/min

Results

Default result
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Usable force (F_use)
28,270 N
Pass

28.27 kN · 6,356 lbf · 2.88 t

Push stroke (full bore) after 90% efficiency.

Selected stroke after the efficiency allowance.

Also computed

Theoretical force (F) 31,420 N

31.42 kN · 7,063 lbf · 3.2 t

Push stroke (full bore).

Selected stroke before efficiency losses.

Push force (theoretical) 31,420 N

7,063 lbf

Pull force (theoretical) 25,330 N

5,695 lbf

Rod area subtracted.

Rod-area differential 6,082 N

1,367 lbf

Force the rod removes on the pull stroke (P × rod area).

Piston area 1,963 mm²

Rod area 380.1 mm²

Method notes 2 notes
  • Usable force applies the entered mechanical efficiency to pressure × area. Set efficiency to 100% for ideal theoretical force.
  • Pull (retract) force is lower than push by exactly the rod-area differential, because the rod removes area on the rod side.

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