// multi-utility computation suite · offline · instant · precise
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│ [c] calcalyst_ │
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tool.pump-head-pressure Calculator
Calculates total dynamic head for a pump system — friction losses, static lift, and velocity head — and matches it to pump performance curves. Oversized pumps run in the wrong region of their curve, consuming excess energy and wearing out faster.
Inputs
Flow Lpm
Volume of fluid per unit time. Used to size pipes, pumps, and ducts.
Head M
Reference formula or conversion factor shown for context.
Efficiency Pct
Useful output divided by total input, as a percentage. 100% is impossible due to losses (heat, friction, resistance).
Fluid Density
Mass per unit volume (kg/m³). Water: 1,000. Air: 1.225. Steel: 7,850. Affects buoyancy, flow, and structural loads.
Results
shaft power (kW)
Reference formula or conversion factor shown for context.
hydraulic power (kW)
Reference formula or conversion factor shown for context.
pump efficiency
Useful output divided by total input, as a percentage. True 100% efficiency is impossible — losses appear as heat. LEDs: 30–50%. Electric motors: 85–97%. Switching supplies: 85–95%.
motor size recommendation (kW)
Suggested action or value based on the computed results and applicable best-practice guidelines.
P = ρgQH
Reference formula or conversion factor shown for context.