Carolina DX Association - W4DXA  

Enter primary operating frequency in Mhz.   
Inverted Vee, approximate angle from horizontal. 22 Degree - 2% shorter 30 Degree - 3% shorter 37 Degree - 4% shorter 45 Degree - 5% shorter

Click to or

Dipole's length		Assuming level ground, the minimum height of vee will be  (length of leg * sin(angle from horizontal) plus the height of endpoints of vee above ground. The horizontal spread of Vee will be the distance from endpoint to endpoint, plus the tie off points..
Each leg
Total Vee length
Each Vee leg
Min vert. height
Min horiz. spread

NOTE: Remember that location, height, obstructions, wire type, wire coating, etc will effect the calculated lengths.  Always cut your wire a little longer and then trim for your installation.

The basic formula for determining the wire length of a center fed, 1/2 wave wire dipole or inverted Vee antenna (30 mhz or less) is 468/freq(mhz).

The inverted Vee antenna will be shorter by 2 - 5%  depending on the angle from horizontal.  

Dipoles and inverted vee antennas have a feed point of about 75 ohm's in free space, and can be fed with 52 to 72 ohm coax with or without a 1:1 balum.