Air Cylinder Force Calculator

Accurate engineering. Calculate the exact push and pull (retract) force of your pneumatic cylinders at any pressure.

Required for calculating pull force.
Push Force (Extension)
251 lbs
Pull Force
226 lbs
Piston Area
3.14 in²

Push vs Pull Force

I genuinely believe that the "rod diameter" is the most forgotten variable in pneumatic design. When you push a cylinder, air acts on the full surface of the piston. But when you pull it back (retract), the air acts on the piston surface *minus* the area taken up by the rod. This means your cylinder is always weaker when it's pulling than when it's pushing.

Efficiency Factor: In a real-world setting, you should multiply the calculated force by 0.7 or 0.8. Internal friction, seal drag, and pressure drops in the valves mean you'll rarely get 100% of the theoretical force.

Formulas Used:

  • Area: (π × Bore²) / 4
  • Push Force: Pressure × Area
  • Pull Force: Pressure × (Piston Area - Rod Area)