// multi-utility computation suite · offline · instant · precise
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sci.hydraulic-pump-displacement Calculator
Calculates hydraulic pump theoretical displacement, actual flow rate, and mechanical efficiency from pressure, RPM, and torque. Pump volumetric efficiency = actual flow/theoretical flow — internal leakage reduces efficiency at high pressure; axial piston pumps achieve 95% volumetric, 90% mechanical efficiency.
Inputs
Dp Cc Rev
Net position change from start to end — a vector. Different from distance, which is the total path length.
N Rpm
Rate of movement. 1 m/s = 3.6 km/h = 2.237 mph.
Eta Vol
Useful output divided by total input, as a percentage. 100% is impossible due to losses (heat, friction, resistance).
P Bar
Force per unit area (Pa). Atmospheric pressure at sea level: 101,325 Pa. Check whether gauge or absolute pressure is required.
Eta Mech
Useful output divided by total input, as a percentage. 100% is impossible due to losses (heat, friction, resistance).
Results
flow rate Q (L/min)
Flow rate Q — the volume of fluid passing a point per unit time.
hydraulic power (kW)
Reference formula or conversion factor shown for context.
shaft power required (kW)
Reference formula or conversion factor shown for context.
overall efficiency η
Useful output divided by total input, as a percentage. True 100% efficiency is impossible — losses appear as heat. LEDs: 30–50%. Electric motors: 85–97%. Switching supplies: 85–95%.