Pumps, Fans and Turbines - Horsepower
Calculator for horsepower calculations related to pumps, fans, and turbines. Includes water horsepower, brake horsepower, and electrical motor input calculations with various unit options.
| Parameter | Formula | Description |
|---|---|---|
| Water Horsepower (mass flow - lbm/min) | Php = (inputs.mass_flow_min * inputs.head * 32) / 33000 | Power in horsepower based on mass flow rate per minute and head height |
| Water Horsepower (mass flow - lbm/s) | Php = (inputs.mass_flow_sec * inputs.head * 32) / 550 | Power in horsepower based on mass flow rate per second and head height |
| Water Horsepower (volume flow - ft³/min) | Php = (inputs.spec_weight * inputs.vol_flow_cfm * inputs.head) / 33000 | Power in horsepower based on volume flow rate and specific weight |
| Water Horsepower (flow in gal/min) | Pwhp = (inputs.spec_gravity * inputs.vol_flow_gpm * inputs.head) / 3960 | Power in horsepower based on flow rate in gallons per minute |
| Brake Horsepower - Pump/Fan | Pbhp = (inputs.spec_weight * inputs.vol_flow_cfm * inputs.head / 33000) / inputs.efficiency | Actual horsepower available for work on the fluid in a pump or fan |
| Brake Horsepower - Turbine | Pbhp = inputs.efficiency * (inputs.spec_weight * inputs.vol_flow_cfm * inputs.head / 33000) | Actual horsepower available from a turbine |
| Input Horsepower to Motor | Php_el = inputs.brake_hp / inputs.motor_efficiency | Input power required from electrical motor |
| Horsepower to Kilowatts | PkW = inputs.horsepower * 0.746 | Conversion from horsepower to kilowatts |
Calculator
Inputs
Results
Water Horsepower (mass/min)-- hp
Water Horsepower (mass/sec)-- hp
Water Horsepower (ft³/min)-- hp
Water Horsepower (gal/min)-- hp
Brake Horsepower (Pump/Fan)-- hp
Input Horsepower to Motor-- hp
Power in Kilowatts-- kW