Coax Calculator Dipole / Inverted Vee Antenna Design
Here's a quick line loss calculator to use  Note that the simple program used for this web page gives a very close approximation for additional losses due to SWR. 
Set Parameters as Desired
Line Type:
Line Length: Feet Meters
Frequency:  MHz
Load SWR:  : 1
Power In:  W
Results
Matched Loss:  dB
SWR Loss:  dB
Total Loss:  dB
Power Out:  W
This program is provided "as-is". It is thought to be accurate but it is the responsibility of the user to verify the accuracy of the calculations when using this program. 


Types of Coax Cable and Line Loss  

  • Belden
    • Belden 8215    (RG-6A)
    • Belden 8237    (RG-8)
    • Belden 9913    (RG-8)
    • Belden 9258    (RG-8X)
    • Belden 8213    (RG-11)
    • Belden 8261    (RG-11A)
    • Belden 8240    (RG-58)
    • Belden 9201    (RG-58)
    • Belden 8219    (RG-58A)
    • Belden 8259    (RG-58C)
    • Belden 8212    (RG-59)
    • Belden 8263    (RG-59B)
    • Belden 9269    (RG-62A)
    • Belden 83241   (RG-141A)
    • Belden 8216    (RG-174)
    • Belden 8267    (RG-213)
    • Belden 9913F7   
    • Belden 7810A   
    • Belden 7808A   

  • Davis RF
    • Davis RF Bury-Flex

  • Times Microwave Systems
    • TMS LMR-100A
    • TMS LMR-200
    • TMS LMR-240
    • TMS LMR-400
    • TMS LMR-600
    • TMS LMR-900

  • Wireman (coax)
    • Wireman CQ102    (RG-8)
    • Wireman CQ106    (RG-8)
    • Wireman CQ125    (RG-58)
    • Wireman CQ127    (RG-58C)
    • Wireman CQ110    (RG-213)

  • Radio Shack
    • Tandy Cable RG-8X
    • Tandy Cable RG-58
    • Tandy Cable RG-59

  • Andrew
    • Andrew Heliax LDF4-50A
    • Andrew Heliax LDF5-50A
    • Andrew Heliax LDF6-50A

  • Wireman (ladder line)
    • Wireman 551 Ladder Line
    • Wireman 552 Ladder Line
    • Wireman 553 Ladder Line
    • Wireman 554 Ladder Line
    • Wireman 551 (wet)
    • Wireman 552 (wet)
    • Wireman 553 (wet)
    • Wireman 554 (wet)

  • Miscellaneous
    • Generic 300 ohm Tubular
    • Generic 450 ohm Window
    • Generic 600 ohm Open
    • Ideal (lossless) 50 ohm
    • Ideal (lossless) 75 ohm

The "wet" numbers represent worst case for lines covered with ice or snow.