Hydraulic Pressure Calculator
SI
Imp
Imperial
Inputs
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Target force
(F)
Required cylinder output force.
N
Bore diameter
(B)
Cylinder bore (piston diameter).
mm
Rod diameter
(d)
Piston rod diameter, subtracted on the pull stroke.
mm
Stroke
Push uses full piston area; pull uses annulus area after subtracting the rod.
Push (extend)
Pull (retract)
Efficiency factor
(η)
Optional derating for seal friction and pressure losses. Use 1.0 for theoretical pressure.
Results
Default result
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Required pressure
(P)
141.5
bar
Pass
Also computed
Theoretical pressure
127.3
bar
Before the efficiency factor.
Working area
(A)
1,963
mm²
Piston area
1,963
mm²
Rod area
380.1
mm²
Annulus area
1,583
mm²
Method notes
3 notes
Pressure is target force divided by working area: P = F / A.
Push uses the full piston area; pull uses the annulus area after subtracting rod area.
Efficiency factor is a practical derating for seal friction, pressure drop and back pressure.
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