Water Pump Engineering Calculators

A series of calculators that calculate a number of water pump related values based on a variety of different values

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)