# Calculate frequency and period

Online calculators and formulas for calculating the frequency and period of AC voltages

## Calculate frequency or period

On this page you can calculate the duration of the period for a certain frequency, or the frequency for a period.

Period and frequency calculator

 What should be calculated? Period Frequency Input Frequency Hz kHz MHz GHz Period pSek nSek µSek mSek Sek Decimal places 0 1 2 3 4 6 8 10 Result Period Frequency

Tip: A calculator for calculating frequency and wavelengths can be found here

## Formula for frequency and period time

The frequency is the number of periods per second. The formula below applies to the calculation of the frequency:

$$\displaystyle f= \frac{1}{T}$$

The duration of a period is calculated using the following formula:

$$\displaystyle T= \frac{1}{f}$$

#### Legend

 $$\displaystyle f$$ Frequency in Hz $$\displaystyle T$$ Duration of a period in seconds