Torque Calculator

Torque Equation

$$ Q = \frac{1}{2} \rho n^2 D^5 C_Q $$ where:

Q = Torque (Nm)

ρ = Density of fluid (kg/m³)

n = Propeller rotational speed (rev/s)

D = Propeller diameter (m)

C_Q = Torque Coefficient (dimensionless)

Calculator

Property to Calculate:

Torque (Q):

Density of fluid (ρ):

Propeller rotational speed (n):

Propeller diameter (D):

Torque Coefficient (C_Q):

Equation Assumptions

The system is in steady state.
Flow is uniform.
The fluid is incompressible.
The blade flexibility is negligible.
System is under isothermal conditions.