Pump Power Calculator: Calculate Hydraulic and Shaft Power for Pumps

Calculate hydraulic and shaft power for centrifugal pumps using flow rate, density, head, and efficiency. Supports both SI and Imperial units.

Calculator

Flow Rate (m³/h)

Fluid Density (kg/m³)

Differential Head (m)

Pump Efficiency ((0-1))

Hydraulic Power-- kW

Hydraulic Power-- hp

Shaft Power-- kW

Shaft Power-- hp

Calculator

Flow Rate (gpm)

Differential Head (ft)

Specific Gravity ((dimensionless))

Pump Efficiency ((0-1))

Hydraulic Power-- hp

Shaft Power-- hp

Flow (m³/h)	Head (m)	Density (kg/m³)	Hydraulic Power (kW)	Shaft Power at 85% Efficiency (kW)
0.5	5	1000	0.0068	0.008
1	10	1000	0.0272	0.032
2	15	1000	0.0816	0.096
5	20	1000	0.272	0.32
10	25	1000	0.68	0.8
20	30	1000	1.63	1.92
50	40	1000	5.45	6.41
100	50	1000	13.6	16