Calculate total pump head from static lift, friction losses and pressure requirements.
Static lift is fixed but loss terms rise with the square of flow, so a pump curve intersects the system curve at one operating point. Knowing the static share tells you how steeply the system curve rises. A system dominated by static lift behaves very differently under throttling from one dominated by friction, which determines whether variable-speed control saves energy.
Pump Head
TDH = static lift + friction losses + fitting losses + pressure head
TDH = static lift + friction losses + fitting losses + pressure head Static lift is fixed but loss terms rise with the square of flow, so a pump curve intersects the system curve at one operating point. Knowing the static share tells you how steeply the system curve rises.
A system dominated by static lift behaves very differently under throttling from one dominated by friction, which determines whether variable-speed control saves energy.
This calculator takes 5 inputs: Static lift, Friction head loss, Loss through fittings and valves, Required pressure at the outlet, Fluid density. The pre-filled defaults are a realistic starting point — replace them with figures from your own environment for a result you can act on.