Engineers often require power factor calculator especially when they are working on site. This is a handy calculator for calculating power factor making it easier for engineers.

**How to use the calculator?**

- For this calculator, note down the values of kW of an equipment.
- Note down kVA. If you do not have kVA ratings of equipment then you can use this calculator ‘Volt-ampere Calculator‘ to find it.
- Enter the values in respective field.
- The calculator would show automatically the calculated value.

**How to calculate power factor?**

You can find power factor with help of following formula:

Power Factor cos Φ = kW / kVA

where,

kW = True power

kVA = Apparent power

Example: Let us say you have 415 VAC motor of 450 kW having rated current 716 amps. The kVA ratings of this motor is 514.0. The power factor is ** 0.87**.

Note that, normally on motor name plate, kVA ratings may not be mentioned. So use the ‘Volt-ampere Calculator‘ to find kVA.