Calculate the RC cutoff frequency

Calculation of the cut-off frequency of a capacitor-resistor circuit

RC cutoff frequency calculator


This function can be used to calculate the cutoff frequency of a capacitor and a resistor, or the capacitance or resistance at a given frequency. Two of the values ​​must be known in order to calculate the third.


Calculate cutoff frequency

  What should be calculated?
 Input
Capacitor
Cutoff frequency
Resistor
Decimal places
 Result
Capacitor
Cutoff frequency
Resistor

Formulas for calculating the cutoff frequency


The frequency is calculated according to the following formula. The resistance \(\displaystyle R \) and the capacity \(\displaystyle C \) must be known.

\(\displaystyle f=\frac{1}{2 ·\ π · R · C }\)

Formula for calculating the resistance


The resistance can be calculated using the following formula. The frequency \(\displaystyle f \) and the capacity \(\displaystyle C \) must be known.

\(\displaystyle R=\frac{1}{2 ·\ π · f · C }\)

Formula for calculating the capacity

The capacity is calculated according to the following formula. The frequency \(\displaystyle f \) and the resistance \(\displaystyle R \) must be known.

\(\displaystyle C=\frac{1}{2 ·\ π · f · R }\)

Related functions:

Calculate RC series connection, calculates the voltages, powers, current and reactance at a given frequency at a given frequency.

RC low pass calculation calculates the output voltage, attenuation and phase rotation for the given frequency

RC high pass calculate calculates the output voltage, attenuation and phase shift for the given frequency


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