Piston Pump Calculator

Calculate flow and pressure for axial and radial piston pumps based on geometry and swashplate angle.

Input Parameters

Results

--
Disp/Piston
in³
--
Total Displacement
in³/rev
--
Flow Rate
GPM
--
Max Flow (full angle)
GPM
Note: Piston pumps achieve highest pressures (5000+ psi) and best efficiency (95%+). Odd piston count reduces flow ripple.

Reference

A_piston = π/4 × d² Effective Stroke = Stroke × sin(θ) / sin(θ_max) Disp/Piston = A × Eff. Stroke Total Disp = Disp/Piston × N_pistons Flow = (Total Disp × RPM × η_vol) / 231