Coax Attenuation Chart

The following charts measure the attenuation (loss) of different types of coax at 50 and 100 foot lengths for each of the amateur radio bands. Attenuation is measured in dB.

50′ 160 80 40 20 15 10 6 2 70
RG-8 0.1 0.2 0.2 0.4 0.4 0.5 0.7 1.2 2.2
RG-8/U 0.1 0.2 0.2 0.4 0.4 0.5 0.7 1.2 2.2
RG-8X 0.2 0.3 0.5 0.7 0.8 1.0 1.3 2.2 4.0
RG-58 0.3 0.4 0.6 0.8 1.0 1.2 1.6 2.8 4.9
RG-59 0.2 0.3 0.4 0.6 0.8 0.9 1.2 2.0 3.6
RG-142 0.3 0.4 0.5 0.7 0.9 1.0 1.4 2.3 4.1
RG-213 0.1 0.2 0.2 0.4 0.4 0.5 0.7 1.2 2.2
RG-214 0.1 0.2 0.3 0.4 0.5 0.6 0.8 1.4 2.5
RG-393 0.1 0.2 0.3 0.4 0.5 0.5 0.7 1.2 2.3
RG-400 0.3 0.4 0.6 0.8 1.0 1.2 1.6 2.7 4.7
LMR-240 0.2 0.2 0.3 0.5 0.6 0.7 0.9 1.5 2.6
LMR-240 Ultra 0.2 0.3 0.4 0.5 0.7 0.8 1.1 1.8 3.1
LMR-400 0.1 0.1 0.2 0.2 0.3 0.3 0.4 0.8 1.3
LMR-400 Ultra 0.1 0.1 0.2 0.3 0.3 0.4 0.5 0.9 1.6
100′ 160 80 40 20 15 10 6 2 70
RG-8 0.3 0.4 0.5 0.7 0.9 1.0 1.4 2.4 4.4
RG-8U 0.3 0.4 0.5 0.7 0.9 1.0 1.4 2.4 4.4
RG-8X 0.5 0.7 0.9 1.3 1.6 1.9 2.6 4.5 8.1
RG-58 0.6 0.9 1.2 1.7 2.1 2.4 3.3 5.5 9.8
RG-59 0.4 0.6 0.9 1.2 1.5 1.8 2.4 4.1 7.2
RG-142 0.5 0.7 1.0 1.4 1.7 2.0 2.7 4.6 8.2
RG-213 0.3 0.4 0.5 0.7 0.9 1.0 1.4 2.4 4.4
RG-214 0.3 0.4 0.6 0.8 1.0 1.2 1.6 2.7 4.9
RG-393 0.3 0.4 0.5 0.7 0.9 1.1 1.4 2.5 4.5
RG-400 0.6 0.8 1.1 1.6 2.0 2.3 3.1 5.3 9.4
LMR-240 0.3 0.5 0.6 0.9 1.1 1.3 1.8 3.0 5.2
LMR-240 Ultra 0.4 0.6 0.8 1.1 1.3 1.6 2.1 3.6 6.2
LMR-400 0.2 0.2 0.3 0.5 0.6 0.7 0.9 1.5 2.7
LMR-400 Utra 0.2 0.3 0.4 0.6 0.7 0.8 1.1 1.8 3.2