Pump Sizing Calculator
Calculate total dynamic head and pump requirements
Flow Requirements
Head Components
Vertical distance from water level to discharge
Pressure needed at discharge point
Pump Requirements
Total Dynamic Head (TDH)
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Minimum Pump HP
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Static Head
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Friction Head
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Pressure Head
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Fitting Losses
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Selection Tip: Select a pump that operates at 80-110% of design point for best efficiency.
Pump Power Formula
HP = (GPM × TDH × SG) / (3960 × η)
GPM = Flow rate
TDH = Total dynamic head (feet)
SG = Specific gravity (1.0 for water)
η = Pump efficiency (typ. 0.5-0.8)
Common Pump Applications
Sump Pump
1/3-1 HP typical
30-60 GPM
8-20 ft head
Sewage Pump
1/2-2 HP typical
40-100 GPM
15-30 ft head
Booster Pump
1/2-3 HP typical
5-50 GPM
40-80 psi boost
Circulation
1/25-1/6 HP typical
5-20 GPM
5-15 ft head