• FM Channel to Frequency
  • FM Frequency to Channel
  • TV Channel to Frequency Band
  • Feet to/from Meters
  • Miles to/from Kilometers
  • Field Strength Units: dBu to/from mV/m
  • Power Units: kW to/from dBk
  • Power: Relative Field
  • Transmission Line Efficiency (FM broadcast band only)
  • Electrical Degrees To/from Meters
  • Degrees Minutes Seconds to Decimal Degrees
  • Decimal Degrees to Degrees Minutes Seconds
  • The conversions below require Javascript to function.


    FM and TV Channel / Frequency conversions


    FM Channel to Frequency:    
       Enter Channel: 
      Frequency:  MHz

    FM Frequency to Channel Number:  
       Enter Frequency: 

    TV Channel to Frequency Band

      Enter TV Transmit Channel: 
    (2 to 69)
    Band:   MHz


    Metric / English distance conversions

      Feet To/From meters
      Enter the distance
    Select meters or feet 
    , Result:

    meters = feet * 0.3048     feet = meters / 0.3048

    Miles To / From Kilometers

      Enter the distance
    Select miles or km 

    kilometers = miles * 1.609344     miles = kilometers / 1.609344


    Field Strength -- dBu to / from mV/m

      Enter field strength 
    Select mV/m or dBu

    mV/m = 10(dBu/20) / 1000.     dBu = 20 log10 ((mV/m) * 1000.)
    The factor of 1000 is used to convert millivolts per meter to microvolts per meter.


    • Common FCC-Defined Equivalent dBu and mV/m Values
      (dB above 1 microvolt
      per meter (uV))
      (millivolts per meter
      electric field strength)
      100 dBu 100 mV/m
      80 dBu 10 mV/m
      70 dBu 3.16 mV/m
      60 dBu 1.0 mV/m
      54 dBu 0.5 mV/m
      40 dBu 0.1 mV/m
      34 dBu 0.05 mV/m
      28 dBu 0.025 mV/m
      Note: Higher field strength values are found closer to a transmitter site. For FM and TV field strengths and distances, use the propagation curves program.



        kW (kilowatts) to / from dBk (dB kilowatts)


        Enter power value 
      Select kilowatts or dBk 

      kW = 10(dBk / 10)     dBk = 10 log10 (kW)


      Relative Field Values for Directional Pattern

        Enter the maximum ERP, in kW       
        Enter the radial ERP in kW, 
        or relative field value (0.000 to 1.000) 

      Select Relative Field or Radial ERP


      Radial ERP = (Maximum ERP) * (relative field) 2

      Transmission Line Efficiency -- Computed values are valid for the FM radio band only.
      -- This function does not cover all cable types.


        FM Channel number (200 to 300): 

      efficiency (as decimal) = 10-[(dB/100 feet) * (length in meters)] / [1000 * 0.3048]
      where dB/100 feet is the manufacturer's value for the attenuation in the cable.


      Electrical Degrees to/from Meters



      Necessary Parameters:


          Meters per wavelength
          at this frequency (computed):
      meters per wavelength
      Electrical Degrees to Meters

        electrical degrees
      Meters to Electrical Degrees

      electrical degrees

      wavelength (m) = [speed of light (m/sec)] / [frequency (Hz = cycles/sec)]
      where speed of light = 2.99792456 * 108 meters/second

      360 electrical degrees = 1 wavelength




      Enter Degrees Minutes Seconds

      Degrees Minutes Seconds to Decimal Degrees

            Search for FM Stations in a Frequency Range:

                    Lower Frequency:                         Select Lower Frequency:

      Select Upper Frequency
      Results:  Latitude:   Longitude:           

      Decimal Degrees to Degrees Minutes Seconds

      Results:  Latitude:   Longitude:           

      AM Wavelength, given Frequency

      Enter AM Frequency in kHz: 
      (1000 kHz = 1 MHz) 


      meters in wavelength
      Speed of light = (frequency) * (wavelength), where frequency is in Hz, wavelength in meters, and speed of light = 2.99792458 * 108 meters/second.

      Thursday, November 17, 2022