Power Coefficient Calculator

Power Coefficient (C_P):

Shaft Power (P):

Density of fluid (ρ):

Propeller rotational speed (n):

Diameter of the propeller (D):

How This Is Calculated

$$ C_P = \frac{P}{\rho n^3 D^5} $$ where:

C_P = Power Coefficient (Dimensionless)

P = Shaft power delievered to the propeller (W)

ρ = Density of fluid (kg/m³)

n = Rotational speed of propeller (rev/s)

D = Diameter of the propeller (m)

Assumptions

The system is in steady state.
Fluid is incompressible.
The flow is at the propeller disk is uniform.
The fluid behaves as an ideal gas.
There are no propeller interaction effects.

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