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Wavelength Calculator



A wavelength is the distance a sound wave travels in the time it takes to complete one cycle.  Frequency is the number of cycles per second (hertz).  Frequency and wavelength are related as follows:

Speed of Sound
(feet per second)
Wavelength (feet)   =      ----------------------------------------   (1-1)
Frequency (hertz)

This can be written as:

Speed of Sound
Frequency =  ----------------------------   (1-2)

The speed of sound in air is approximately 1,130 feet per second (770 mph) at normal temperatures.
The 1-1 equation for sound travelling in air becomes:

Wavelength =  ----------------------------   (1-3)

= ft. (or inches.)
Example:200 KHz [0.2MHz] has a wavelength of 4920 feet, which is approximately 1500 metres

Free JavaScripts provided
by The JavaScript Source

The online wavelength calculator is designed to assist ham radio operators in converting a radio frequency to its wavelength in feet or inches. Other uses include acoustic measurement and adjustment, microphone placement, room tuning, and speaker positioning.  Visit the authors site to calculate voltage, resistance & current.

Scripts Author:- Jon Bronisz
Web Site:- www.frequencyzone.com (Site no longer available)
Modified by: Ronnie T. Moore, Editor

Webmaster note: Various people have asked why the script states MHz instead of Hz - as this script was provided by an external website and we present it 'as is' a response is provided below and further information can be found at Wikipedia - Hertz:

Abbreviation for megahertz. One MHz represents one million cycles per second. The speed of microprocessors, called the clock speed, is measured in megahertz. For example, a microprocessor that runs at 200 MHz executes 200 million cycles per second. Each computer instruction requires a fixed number of cycles, so the clock speed determines how many instructions per second the microprocessor can execute. To a large degree, this controls how powerful the microprocessor is. Another chief factor in determining a microprocessor's power is its data width (that is, how many bits it can manipulate at one time). In addition to microprocessors, the speeds of buses and interfaces are also measured in MHz.