Runs entirely in your browser - no upload, no sign-up.
Use a decimal point or scientific notation, such as 2.4e9.
1000 Hz ≈ 1 kHz
0.001 s
Period = 1 ÷ frequency in Hz
Enter a frequency and choose its source and target units. This frequency converter calculates equivalents from microhertz to terahertz, revolutions per minute and radians per second. It also shows the duration of one cycle. Results update as you type, and all calculations run locally in your browser.
Type zero or a positive number. Use a decimal point or scientific notation such as 2.4e9. Commas and unit suffixes are not accepted.
Select From unit and To unit. Swap units switches the selectors while keeping your entered number.
Check the converted frequency and period in seconds. Expand All 9 unit equivalents for a reference table, or copy the conversion equation.
Hertz counts cycles per second. SI prefixes change that count by powers of ten: 1 kHz = 1,000 Hz, 1 MHz = 1,000,000 Hz, and 1 GHz = 1,000,000,000 Hz. Watch the case: mHz means millihertz, while MHz means megahertz, a billion times larger.
For a shaft rotating at 3,000 rpm, divide by 60 to get 50 Hz. Each revolution takes 1 / 50 = 0.02 seconds. Angular frequency describes that same rotation as approximately 314.159265359 rad/s. The relationships follow the NIST SI definitions and SI prefixes.
No. The calculation runs in this page using your browser. Entered values are not sent to a conversion service or saved in your recent-tools history. That history records only that you opened this tool.
Yes. There is no account, payment or conversion quota. It converts frequency measurements; it does not alter an audio file or change the electrical frequency of a power supply.
Enter zero or a positive value from 1e-200 through 1e200, with at most 120 characters. Results use standard floating-point arithmetic and display up to 12 significant digits. SI scaling factors are exact definitions, but displayed decimal results can be rounded. Scientific notation keeps tiny nonzero values visible.
Divide revolutions per minute by 60. For example, 3,000 rpm is 50 Hz when one revolution is one cycle. Multiply Hz by 60 to convert back. For motors, electrical supply frequency and shaft rotation can differ; this converter does not model pole count, gearing or slip.
Multiply frequency in Hz by 2π. A 1 Hz cycle corresponds to approximately 6.28318530718 rad/s. Divide radians per second by 2π to return to Hz. The tool uses the browser's numerical approximation of π.
Period is the time for one cycle: T = 1 / f, with frequency f in Hz and period T in seconds. A 50 Hz signal has a 0.02-second period. At zero frequency there is no finite cycle period, so the tool shows an explanation instead of a number.
