LPFM Power Chart

Maximum LPFM ERP based on HAAT

§73.811(a) of the Commission's Rules states that a maximum facility for an LPFM station is a 60 dBu contour of 5.6 kilometers (rounded to the tenth).  For stations at 30 meters height above average terrain (HAAT), this is 100 watts effective radiated power (ERP).  For stations at HAATs greater than 30 meters, you can use this chart to determine an LPFM station's maximum ERP:

HAAT Maximum ERP
<= 30 100
31 95
32 89
33 84
34 80
35 75
36 71
37 67
38 64
39 61
40 57
41 55
42 52
43 49
44 47
45 45
46 42
47 41
48 39
49 37
50 35
51 34
52 32
53 31
54 30
55 29
56 28
57 27
58 26
59 25
60 24
61~62 23
63 22
64~65 21
66 20
67~68 19
69~70 18
71~72 17
73~74 16
75~77 15
78~79 14
80~82 13
83~85 12
86~89 11
90~93 10
94~98 9
99~104 8
105~111 7
112~120 6
121~134 5
135~151 4
152~177 3
178~231 2
>= 232 1

Minimum LPFM ERP based on HAAT

§73.811(b) of the Commission's Rules requires an LPFM station to operate a minimum facility with a 60 dBu contour of 4.7 kilometers (rounded to the nearest tenth).  For LPFM stations at 30 meters HAAT or less, the ERP is 50 watts.  For stations at higher HAATs, this chart will apply:

HAAT Minimum ERP
<= 30 50
31 46
32 43
33 40
34 38
35 36
36 34
37 32
38 30
39 29
40 27
41 26
42 25
43 23
44 22
45 21
46 20
47 19
48~49 18
50 17
51 16
52~53 15
54~55 14
56~57 13
58~60 12
61~63 11
64~67 10
68~71 9
72~76 8
77~82 7
83~90 6
91~101 5
102~118 4
119~150 3
151~249 2
>= 250 1