Antenna Length Calculator

Desired Resonant Frequency:

1/2 wave dipole: 1/4 wave whip:
Length in inches
Length in feet
Length in meters

Note: Actual length depends on conductor diameter and end effects. This program overestimates the length if the conductor diameter is larger than 1/20 wavelength. Length is also overestimated at very high frequencies. Use this program for estimated values, but use an SWR meter to prune to final dimensions.

© 1997 Mike Brosnan WB5MRN