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Frequency and wavelength conversion calculator

Full λ m
3/4 λ m
5/8 λ m
Half λ m
1/4 λ m

The relationship between wavelength and frequency:

Frequency is the number of times a periodic change is completed per unit time. It is a quantity that describes the frequency of periodic motion. It is usually represented by the symbol f or u, and the unit is one part of a second. Wavelength refers to the distance that a wave propagates in one vibration cycle. That is, along the propagation direction of the wave, the distance between two adjacent points with a phase difference of 2π. The wavelength λ is equal to the product of the wave speed V and the period T, that is, λ=VT.

Radio spectrum: Usually radio waves refer to the range from extremely low frequency 10KHz to the ultra-high frequency peak 30GHz (Giga Hertz), because the characteristics of the radio spectrum outside this range are very different, such as light, X-rays, etc., and in the above 10KHz to 30GHz, it is usually divided into seven areas, see the table below, among which the high frequency 3~30MHz is the short wave we are discussing.

Allocation of radio spectrum:

  • Very Low-Frequency VLF Very Low-Frequency Frequency Range 10KHz – 30KHz
  • Low-Frequency LF (commonly known as Long Wave LW) Low-Frequency Frequency Range 30KHz – 300KHz
  • Medium-Frequency MF (commonly known as Medium Wave MW) Medium-Frequency Frequency Range 30KHz – 3000KHz
  • High-Frequency HF (commonly known as Short Wave SW) High-Frequency Frequency Range 3MHz – 30MHz
  • Very High-Frequency VHF (commonly known as Ultra Short Wave, while Civilian Broadcasting with a Frequency Range of 88-108MHZ is commonly known as FM Radio) Very High Frequency Frequency Range 30MHz – 300MHz
  • UHF Ultra High-Frequency Frequency Range 300MHz – 3000MHz
  • Super High-Frequency SHF Super High-Frequency Frequency Range 3000MHz – 30000MHz

International shortwave broadcasting bands:

All radio frequencies used around the world are allocated by the International Telecommunications Union. The International Telecommunication Union (ITU: International Telecommunication Union) is an international telecommunications management organization affiliated with the United Nations. It regularly convenes member states to meet to decide on the allocation and use of radio frequencies. There are 13 international shortwave broadcasting bands established by ITU. Each meter band has a certain frequency range. You may find it strange that 2.3-26.1MHZ is divided into 13 segments. Why are they not connected together? This is because: in the high-frequency spectrum (3-30MHz), the International Telecommunications Management Organization (ITU) has regulations that in addition to international shortwave broadcasting, there are many other communication uses. You can easily find the meter band division table in the radio manual

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