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Power Conversions

Unit Conversion Charts

dbm to dbw to watts to volts

Dbm Dbw Watts Volts Dbm Dbw Milliwatts Volts
60 30 1,000.0 223.61 30 0 1,000.0 7.07
59 29 794.3 199.29 29 -1 794.3 6.30
58 28 631.0 177.62 28 -2 631.0 5.62
57 27 501.2 158.30 27 -3 501.2 5.01
56 26 398.1 141.09 26 -4 398.1 4.46
55 25 316.2 125.74 25 -5 316.2 3.98
54 24 251.2 112.07 24 -6 251.2 3.54
53 23 199.5 99.88 23 -7 199.5 3.16
52 22 158.5 89.02 22 -8 158.5 2.82
51 21 125.9 79.34 21 -9 125.9 2.51
50 20 100.0 70.71 20 -10 100.0 2.24
49 19 79.4 63.02 19 -11 79.4 1.99
48 18 63.1 56.17 18 -12 63.1 1.78
47 17 50.1 50.06 17 -13 50.1 1.58
46 16 39.8 44.62 16 -14 39.8 1.41
45 15 31.6 39.76 15 -15 31.6 1.26
44 14 25.1 35.44 14 -16 25.1 1.12
43 13 20.0 31.59 13 -17 20.0 1.00
42 12 15.8 28.15 12 -18 15.8 0.89
41 11 12.6 25.09 11 -19 12.6 0.79
40 10 10.0 22.36 10 -20 10.0 0.71
39 9 7.9 19.93 9 -21 7.9 0.63
38 8 6.3 17.76 8 -22 6.3 0.56
37 7 5.0 15.83 7 -23 5.0 0.50
36 6 4.0 14.11 6 -24 4.0 0.45
35 5 3.2 12.57 5 -25 3.2 0.40
34 4 2.5 11.21 4 -26 2.5 0.35
33 3 2.0 9.99 3 -27 2.0 0.32
32 2 1.6 8.90 2 -28 1.6 0.28
31 1 1.3 7.93 1 -29 1.3 0.25
Dbm Dbw Nanowatts Microvolts Dbm Dbw MIcrowatts Microvolts
0 -30 1,000.0 223,607 | -30 -60 1,000.0 7,071.07
-1 -31 794.3 199,290 | -31 -61 794.3 6,302.10
-2 -32 631.0 177,617 | -32 -62 631.0 5,616.75
-3 -33 501.2 158,301 | -33 -63 501.2 5,005.93
-4 -34 398.1 141,086 | -34 -64 398.1 4,461.54
-5 -35 316.2 125,743 | -35 -65 316.2 3,976.35
-6 -36 251.2 112,069 | -36 -66 251.2 3,543.93
-7 -37 199.5 99,881 | -37 -67 199.5 3,158.53
-8 -38 158.5 89,019 | -38 -68 158.5 2,815.04
-9 -39 125.9 79,339 | -39 -69 125.9 2,508.91
-10 -40 100.0 70,711 | -40 -70 100.0 2,236.07
-11 -41 79.4 63,021 | -41 -71 79.43 1,992.90
-12 -42 63.1 56,167 | -42 -72 63.10 1,776.17
-13 -43 50.1 50,059 | -43 -73 50.12 1,583.01
-14 -44 39.8 44,615 | -44 -74 39.81 1,410.86
-15 -45 31.6 39,764 | -45 -75 31.62 1,257.43
-16 -46 25.1 35,439 | -46 -76 25.12 1,120.69
-17 -47 20.0 31,585 | -47 -77 19.95 998.81
-18 -48 15.8 28,150 | -48 -78 15.85 890.19
-19 -49 12.6 25,089 | -49 -79 12.59 793.39
-20 -50 10.0 22,361 | -50 -80 10.00 707.11
-21 -51 7.9 19,929 | -51 -81 7.943 630.21
-22 -52 6.3 17,762 | -52 -82 6.310 561.67
-23 -53 5.0 15,830 | -53 -83 5.012 500.59
-24 -54 4.0 14,109 | -54 -84 3.981 446.15
-25 -55 3.2 12,574 | -55 -85 3.162 397.64
-26 -56 2.5 11,207 | -56 -86 2.512 354.39
-27 -57 2.0 9,988 | -57 -87 1.995 315.85
-28 -58 1.6 8,902 | -58 -88 1.585 281.50
-29 -59 1.3 7,934 | -59 -89 1.259 250.89
Dbm Dbw Picowatts Microvolts Dbm Dbw Picowatts Microvolts
-60 -90 1,000.0 223.61 -90 -120 1.0000000 7.07
-61 -91 794.3 199.29 -91 -121 0.7943282 6.30
-62 -92 631.0 177.62 -92 -122 0.6309573 5.62
-63 -93 501.2 158.30 -93 -123 0.5011872 5.01
-64 -94 398.1 141.09 -94 -124 0.3981072 4.46
-65 -95 316.2 125.74 -95 -125 0.3162278 3.98
-66 -96 251.2 112.07 -96 -126 0.2511886 3.54
-67 -97 199.5 99.88 -97 -127 0.1995262 3.16
-68 -98 158.5 89.02 -98 -128 0.1584893 2.82
-69 -99 125.9 79.34 -99 -129 0.1258925 2.51
-70 -100 100.0 70.71 -100 -130 0.1000000 2.24
-71 -101 79.43 63.02 -101 -131 0.0794328 1.99
-72 -102 63.10 56.17 -102 -132 0.0630957 1.78
-73 -103 50.12 50.06 -103 -133 0.0501187 1.58
-74 -104 39.81 44.62 -104 -134 0.0398107 1.41
-75 -105 31.62 39.76 -105 -135 0.0316228 1.26
-76 -106 25.12 35.44 -106 -136 0.0251189 1.12
-77 -107 19.95 31.59 -107 -137 0.0199526 1.00
-78 -108 15.85 28.15 -108 -138 0.0158489 0.89
-79 -109 12.59 25.09 -109 -139 0.0125893 0.79
-80 -110 10.00 22.36 -110 -140 0.0100000 0.71
-81 -111 7.943 19.93 -111 -141 0.0079433 0.63
-82 -112 6.310 17.76 -112 -142 0.0063096 0.56
-83 -113 5.012 15.83 -113 -143 0.0050119 0.50
-84 -114 3.981 14.11 -114 -144 0.0039811 0.45
-85 -115 3.162 12.57 -115 -145 0.0031623 0.40
-86 -116 2.512 11.21 -116 -146 0.0025119 0.35
-87 -117 1.995 9.99 -117 -147 0.0019953 0.32
-88 -118 1.585 8.90 -118 -148 0.0015849 0.28
-89 -119 1.259 7.93 -119 -149 0.0012589 0.25

 

Dbm Dbw Picowatts Microvolts
-120 -150 0.0010000 0.224
-121 -151 0.0007943 0.199 Dbw = Dbm – 30
-122 -152 0.0006310 0.178
-123 -153 0.0005012 0.158 Watts = 10^(dbm/10)/1000
-124 -154 0.0003981 0.141
-125 -155 0.0003162 0.126 Volts = Square Root (dbm*50)*
-126 -156 0.0002512 0.112
-127 -157 0.0001995 0.100 * Assumes a 50 ohm circuit
-128 -158 0.0001585 0.089
-129 -159 0.0001259 0.079
-130 -160 0.0001000 0.071
-131 -161 0.0000794 0.063
-132 -162 0.0000631 0.056
-133 -163 0.0000501 0.050
-134 -164 0.0000398 0.045
-135 -165 0.0000316 0.040
-136 -166 0.0000251 0.035
-137 -167 0.0000200 0.032
-138 -168 0.0000158 0.028
-139 -169 0.0000126 0.025
-140 -170 0.0000100 0.022
-141 -171 0.0000079 0.020
-142 -172 0.0000063 0.018
-143 -173 0.0000050 0.016
-144 -174 0.0000040 0.014
-145 -175 0.0000032 0.013
-146 -176 0.0000025 0.011
-147 -177 0.0000020 0.010
-148 -178 0.0000016 0.009
-149 -179 0.0000013 0.008
-150 -180 0.0000010 0.007

 

VSWR to Return Loss

Watts to Dbm

Return Loss VSWR Watts dbm
30 1.06 300 54.8
25 1.11 250 54.0
20 1.20 200 53.0
19 1.25 150 51.8
18 1.28 100 50.0
17 1.33 75 48.8
16 1.37 50 47.0
15 1.43 25 44.0
14 1.50 20 43.0
13 1.57 15 41.8
12 1.67 10 40.0
11 1.78 5 37.0
10 1.92 4 36.0
9 2.10 3 34.8
2 33.0
1 30.0
dbm = 10*log(Power/1mW
Power is in Watts

 

 

Power Input x Insertion Loss = Power Output

Insertion <===================================Input Power In Watts==================================>
Loss 25 50 75 100 125 150 200 250 300
5.0 8.0 16.0 24.3 32.0 40.3 48.0 64.0 80.0 96.0
4.0 10.0 20.0 30.4 40.0 50.4 60.0 80.0 100.0 120.0
3.0 12.5 25.0 38.0 50.0 63.0 75.0 100.0 125.0 150.0
2.5 14.0 28.0 42.0 56.0 70.0 84.0 112.0 141.0 169.0
2.0 16.0 32.0 47.0 63.0 79.0 95.0 126.0 158.0 189.0
1.5 17.5 35.0 53.0 71.0 88.0 106.0 142.0 177.0 212.0
1.0 20.0 40.0 60.0 79.0 99.0 119.0 159.0 199.0 238.0
0.5 22.5 45.0 67.0 89.0 111.0 134.0 178.0 223.0 267.0

Free Space Path Loss

Frequency <===================================Distance in Miles=======================================>
In MHz 0.25 0.5 0.75 1 2 5 10 15 20
150 -68db -74db -78db -80db -86db -94db -100db -104db -106db
220 -71db -77db -81db -83db -89db -97db -103db -107db -109db
460 -78db -84db -87db -90db -96db -104db -110db -113db -116db
860 -83db -89db -93db -95db -101db -109db -115db -119db -121db
940 -84db -90db -94db -96db -102db -110db -116db -120db -122db
1920 -90db -96db -100db -102db -108db -116db -122db -126db -128db
Free Space Loss = 36.6 + 20*log(D) + 20*log(F) where D = distance in miles and F = frequency in MHz

Power Forward Revers VSWRPower in-out VS insertion lossBird Technologies Group

 

 

 

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