Hydropower from available net head calculator

Net head excludes hydraulic losses and overall efficiency includes turbine and generator losses.

Units

P = \frac{Q \times H \times \eta \times 0.746}{3960}

Calculator

Enter the values you know and leave one box empty. Calculate finds the empty one, the result or any input.

Given

P = \frac{1800 \times 68 \times 0.78 \times 0.746}{3960} \approx 17.985

Symbol	Meaning	Unit
$P$	electric output with overall efficiency	kW
$Q$	water flow	gpm
$H$	available net head	ft
$\eta$	overall hydraulic-to-electric efficiency	fraction

Results are estimates for study and screening. Check the inputs, units and assumptions before you use them for design, billing or contract decisions.