Calculate generator output frequency from rotational speed and pole count.
Frequency is rigidly tied to speed and pole count, which is why grid-connected generators must run at exact synchronous speed. A 4-pole machine needs precisely 1,500 rpm for 50 Hz. Frequency stability on a grid is a direct measure of the balance between generation and demand, because any imbalance changes rotational speed.
Generator Frequency
f = n × poles ÷ 120
f = n × poles ÷ 120 Frequency is rigidly tied to speed and pole count, which is why grid-connected generators must run at exact synchronous speed. A 4-pole machine needs precisely 1,500 rpm for 50 Hz.
Frequency stability on a grid is a direct measure of the balance between generation and demand, because any imbalance changes rotational speed.
This calculator takes 3 inputs: Rotational speed, Number of poles, Target frequency. The pre-filled defaults are a realistic starting point — replace them with figures from your own environment for a result you can act on.