This tool calculates period in** nanosecond** (ns) from the frequency in **Hertz** (Hz).

Enter the frequency in Hz.

## Formula

The period T is the inverse of frequency f

**T (seconds) = 1/f (Hz)**

**T (nanoseconds) = [1/f (Hz)]*10 ^{9} **

Since

**1 s = 1,000,000,000 ns**

**T (nanoseconds) = 1,000,000,000/f (Hz)**

**Example Calculations**

- A frequency value of 50 Hz is equivalent to 20,000,000 ns
- A frequency of 100 Hz is equivalent to 10,000,000 ns

**Understanding Frequency and Period**

**Frequency** is the number of occurrences of a repeating event per unit of time. It is commonly measured in hertz (Hz), with one hertz equal to one cycle per second. Higher frequencies are often measured in kilohertz (kHz), megahertz (MHz), or gigahertz (GHz).

**Period** is the duration of one complete cycle of a repeating event, and it is the reciprocal of the frequency. It is measured in units of time such as seconds, milliseconds (ms), microseconds (ยตs), or nanoseconds (ns).