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Power Factor Correction Capacitor Calculator

Find the exact capacitor size in µF needed to correct a lagging power factor to a target value in AC electrical systems. Widely used by electrical engineers designing industrial motor circuits and utility billing compliance solutions.

Real Power (kW) (kW)

Current Power Factor

Target Power Factor

System Voltage

System Frequency

Fill in the required fields to see your result.

Electrical

Capacitor Charge Time Calculator

Calculates how long a capacitor takes to charge fully through a resistor, using the RC time constant. A capacitor is considered effectively fully charged after five time constants (5 × R × C).

Resistance (Ω)

Capacitance (µF)

Fill in the required fields to see your result.

Key differences

	Power Factor Correction Capacitor Calculator	Capacitor Charge Time Calculator
Category	Electrical	Electrical
Inputs required	5	2
Result	Required Capacitance (µF)	Full Charge Time (seconds)
What it does	Find the exact capacitor size in µF needed to correct a lagging power factor to a target value in AC electrical systems. Widely used by electrical engineers designing industrial motor circuits and utility billing compliance solutions.	Calculates how long a capacitor takes to charge fully through a resistor, using the RC time constant. A capacitor is considered effectively fully charged after five time constants (5 × R × C).