Enter the resistance and capacitance of a simple first order low pass filter into the calculator to determine the cutoff frequency.

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## Cutoff Frequency Formula

The following formula can be used to calculate a cutoff frequency.

f = 1/ 2 * pi * R * C

- Where f is the cutoff frequency (hz)
- R is the resistance (ohms)
- C is the capacitance (farads)

## Cutoff Frequency Definition

A cutoff frequency is defined as the frequency at which an electrical systems starts to reduce the amount of energy it lets through.

## Cuttoff Frequency Example

How to calculate cutoff frequency?

**First, determine the resistance.**Measure the resistance in ohms of the low pass filter system.

**Next, determine the capacitance.**Of the same system, measure the capacitance in microfarads.

**Finally, determine the cutoff frequency.**Calculate the cutoff frequency using the formula above.

## FAQ

**What is a cutoff frequency?**

A cutoff frequency is a certain frequency in which the system starts to reduce the amount of energy it lets pass through begins to be reduced.