Work out pneumatic cylinder force instantly with clear inputs, formula shown and shareable results.
Cylinder force is pressure times effective area. Extending, the full piston face is exposed. Retracting, the rod occupies part of the face, so the annular area is smaller and the force lower for the same pressure. That asymmetry is why a double-acting cylinder is usually oriented to push rather than pull the heavy stroke.
Extend force
F = p x pi/4 x bore²
Retract force
F = p x pi/4 x (bore² - rod²)
F = p x pi/4 x bore². Cylinder force is pressure times effective area.
No. Seal friction and back pressure typically absorb 5-15 percent, and dynamic strokes need extra margin because pressure lags behind valve opening.
This calculator takes 3 inputs: Cylinder bore, Rod diameter, Working pressure. The pre-filled defaults are a realistic worked example — replace them with your own site or project figures.