This app calculate power required for agitation.

In this app following losses are also Considered:

Gland losses as 10%
Transmission losses as 20 %

this also gives result as total power required for agitation by considering gland losses and transmission losses.

In this you can following types of agitator:

Straight Blades
Pitched Blade
Curved Blades
Anchor
Propeller
Disc Type
Turbine type
narrow hydrofoil
wide hydrofoil

In this input required as following:

Agitator Diameter in mm.
Agitator Speed in RPM.
No. of agitator
Content density in kg/m3.