Here are the various dimensions you will need when you build an antenna for 146.565 Mhz, the de facto standard Transmitter-hunt frequency. You may also find this list handy when you're reading 2-meter antenna-design articles, for comparison. Or, when you eventually become addicted to transmitter-hunting, you can memorize these dimensions to impress the other hunters :-).
Dimensional data for 146.565 Mhz antennas
Phase
Wavelength Deg.s Meters Ft. In. mm
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1.0 1 360 2.046 6.715 80.585 2046
0.75 3/4 270 1.535 5.036 60.438 1535
0.625 5/8 225 1.279 4.197 50.366 1278
0.5 1/2 180 1.023 3.358 40.292 1023
0.375 3/8 135 0.768 2.518 30.219 768
0.25 1/4 90 0.512 1.679 20.146 512
0.2 1/5 72 0.409 1.343 16.117 409.4
0.125 1/8 45 0.255 0.839 10.073 255.9
0.1 1/10 36 0.204 0.672 8.058 204.7
0.0625 1/16 22.5 0.128 0.420 5.037 127.8
Fraction-to-decimal Conversion
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1/16 0.0625
1/8 0.125
3/16 0.1875
1/4 0.25
5/16 0.3125
3/8 0.375
7/16 0.4375
1/2 0.5
5/8 0.625
3/4 0.75
7/8 0.875