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Online Calculator
RC cutoff frequency calculator
Calculate fc = 1/(2πRC) for an ideal first-order RC circuit.
Information
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Local processing
The values are processed directly in your browser.
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Free
No registration, external API or subscription required.
Frequently asked questions
What is the RC cutoff frequency formula?
fc = 1 / (2πRC).
What units does the calculator use?
Ohms for R and microfarads for C.
Does it also display the RC time constant?
Yes.
Does it apply to complex real-world filters?
It is the ideal model of a first-order RC filter.