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Water Pump Engineering Calculators

There are a number of complex equations that deal with water pump engineering. Although not difficult to work with pen and paper, they can be time-consuming. This page eliminates much of the labor. Simple "plug in" your values in the blanks and press the "Calculate" button.

The results will be computed for you. Best of all, if the answer is used as a variable in another equation, it will automatically be placed in any other such equation, allowing for rapid calculation of pump technical data.

Pressure head
   
Pressure (psi)
Specific Gravity
Head (ft)
Total Dynamic Head
   
Pumping Water Level
from Datum (ft)
Head above Datum (ft)
Velocity Head (ft)
Column Friction
Losses (ft)
Friction Loss through
Discharge Head (ft)
Bowl Horsepower
   
Capacity (gal/min)
Total Dynamic Head (ft)
Specific Gravity
Bowl Efficiency
Total Thrust Acting on Driver Thrust Bearing
   
Bowl Thrust Factor
(lbs/ft of head)
Total Dynamic Head (ft)
Shaft Weight (lbs/ft)
Setting from Head Base
to Top of Bowls (ft)
Field Head
   
Pumping Water Level
from Datum (ft)
Head above Datum (ft)
Power Loss due to Shafting
   
Unit Power Loss (hp/ft)
Setting from Head Base
to Top of Bowls (ft)
Power Loss in Thrust Bearings
   
Rotational Speed (rpm)
Total Thrust (lbs)
Motor Load
   
Bowl Horsepower
Power Loss due to
Shafting
Power Loss through
Thrust Bearing
Field Efficiency
   
Capacity (gal/min)
Field Head (ft)
Specific Gravity
Brake Horsepower
(Motor Load)
Input Horsepower (Power Supplied to Driver)
   
Brake Horsepower
(Driver Load)
Driver Efficiency
Overall Efficiency
   
Field Efficiency
Driver Efficiency
Shaft Elongation
   
Total Dynamic Head (ft)
Setting from Head Base
to Top of Bowls (ft)
Bowl Thrust Factor
(lbs/ft of head)
Shaft Cross-Section (in)