These formulas are helpful for those working with hydraulic cylinders. We also provide hydraulic cylinder calculator tools for rod and telescopic cylinders.
Common Hydraulic Cylinder Formulas
| Extend Area (in²) | = |
π * Bore Diameter (in)²
4
|
|---|---|---|
| Extend Volume (in³) | = |
π * Bore Diameter (in)² * Stroke (in)
4
|
| Extend Time (sec) | = |
Extend Volume (in³) * 60
Flow (gpm) * 231
|
| Extend Rate (in/sec) | = |
Flow (gpm) * 231
Extend Area (in²) * 60
|
| Extend Force (lbs) | = |
Extend Area (in²) * Pressure (psi)
|
| Retract Area (in²) | = |
π * (Bore Diameter (in)² – Rod Diameter (in)²)
4
|
| Retract Volume (in³) | = |
π * (Bore Diameter (in)² ‐ Rod Diameter (in)²) * Stroke (in)
4
|
| Retract Time (sec) | = |
Retract Volume (in³) * 60
Flow (gpm) * 231
|
| Retract Force (lbs) | = |
Retract Area (in²) * Pressure (psi)
|
| Retract Rate (in/sec) | = |
Flow (gpm) * 231
Retract Area (in²) * 60
|
| Retract Rod Area (in²) | = |
Rod Diameter (in)² * 0.7854
|
| Cylinder Ratio | = |
Extend Area (in²)
Retract Area (in²)
|
| Flow out rod (gpm) | = |
Flow in base (gpm)
Cylinder Ratio
|
| Flow out base (gpm) | = |
Flow in rod (gpm) * Cylinder Ratio
|
| Cycle Time (sec) | = |
Extend time (sec) + Retract Time (sec)
|
| Hydraulic Power (HP) | = |
Pressure (psi) * Flow (gpm)
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