J-Pole Antenna Length Calculator

Enter your target frequency: MHz  

The calculated J-Pole measurements for 146 MHz are:

Long Side Short Side Feed Point Spacing
A B C D
4.829 ft 1.603 ft 0.158 ft 0.151 ft
57.945 in 19.233 in 1.89 in 1.808 in
1.472 M 0.489 M 0.048 M 0.046 M
1471.8 mm 488.5 mm 48 mm 45.9 mm