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Here you have the possibility to calculate the cos φ, the active power, and the apparent power
of e.g.,three-phase motors.

cos φ = P / S
cos φ
cos φ has to be between -1 and 1 sein!
Power: P
Apparent Power: S
Please fill all mandatory inputs.

An example:

A 4.0 kW three-phase motor (or 400V electric motor) has a cos phi of 0.85.
What apparent power results from these specifications?

cos φ=P / S
S=P / cos φ
S=4.0kW / 0.85
S=4.706 kVA

Units of measurement:

Active power P=kilowatt [kW]
Apparent power S=kilovolt ampere [KVA]
cos φ=no unit of measurement

To the "Three-phase motors" product page
To the product page "Three-phase motors"