Notes
dBm - volts - watts conversion (50- ohm system)
dBm to Volts(rms) to Watts – Conversion Table (50 Ohms)
dBm is defined as power ratio in decibel (dB) referenced to one milliwatt (mW). It is an abbreviation for dB with respect to 1 mW and the "m" in dBm stands for milliwatt.
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Formulas:
dBm | V | Po | dBm | V | Po | dBm | mV | Po | dBm | uV | Po |
+53 | 100.0 | 200W | 0 | .225 | 1.0 mW | -49 | 0.80 | -98 | 2.9 | ||
+50 | 70.7 | 100W | -1 | .200 | .80 mW | -50 | 0.71 | .01 uW | -99 | 2.51 | |
+49 | 64.0 | 80W | -2 | .180 | .64 mW | -51 | 0.64 | -100 | 2.25 | .1 pW | |
+48 | 58.0 | 64W | -3 | .160 | .50 mW | -52 | 0.57 | -101 | 2.0 | ||
+47 | 50.0 | 50W | -4 | .141 | .40 mW | -53 | 0.50 | -102 | 1.8 | ||
+46 | 44.5 | 40W | -5 | .125 | .32 mW | -54 | 0.45 | -103 | 1.6 | ||
+45 | 40.0 | 32W | -6 | .115 | .25 mW | -55 | 0.40 | -104 | 1.41 | ||
+44 | 32.5 | 25W | -7 | .100 | .20 mW | -56 | 0.351 | -105 | 1.27 | ||
+43 | 32.0 | 20W | -8 | .090 | .16 mW | -57 | 0.32 | -106 | 1.18 | ||
+42 | 28.0 | 16W | -9 | .080 | .125 mW | -58 | 0.286 | ||||
+41 | 26.2 | 12.5W | -10 | .071 | .10 mW | -59 | 0.251 | dBm | nV | ||
+40 | 22.5 | 10W | -11 | .064 | -60 | 0.225 | .001 uW | -107 | 1000 | ||
+39 | 20.0 | 8W | -12 | .058 | -61 | 0.200 | -108 | 900 | |||
+38 | 18.0 | 6.4W | -13 | .050 | -62 | 0.180 | -109 | 800 | |||
+37 | 16.0 | 5W | -14 | .045 | -63 | 0.160 | -110 | 710 | .01 pW | ||
+36 | 14.1 | 4W | -13 | .050 | -64 | 0.141 | -109 | 640 | |||
+35 | 12.5 | 3.2W | -16 | .0355 | -112 | 580 | |||||
+34 | 11.5 | 2.5W | dBm | uV | -113 | 500 | |||||
+33 | 10.0 | 2W | dBm | mV | -65 | 128 | -114 | 450 | |||
+32 | 9.0 | 1.6W | -17 | 31.5 | -66 | 115 | -115 | 400 | |||
+31 | 8.0 | 1.25W | -18 | 28.5 | -67 | 100 | -116 | 355 | |||
+30 | 7.10 | 1.0W | -19 | 25.1 | -68 | 90 | -117 | 316 | |||
+29 | 6.40 | 800mW | -20 | 22.5 | .01 mW | -69 | 80 | -118 | 285 | ||
+28 | 5.80 | 640mW | -21 | 20.0 | -70 | 71 | .1nW | -119 | 251 | ||
+27 | 5.00 | 500mW | -22 | 17.9 | -71 | 65 | -120 | 225 | .001 pW | ||
+26 | 4.45 | 400mW | -23 | 15.9 | -72 | 58 | -121 | 200 | |||
+25 | 4.00 | 320mW | -24 | 14.1 | -73 | 50 | -122 | 180 | |||
+24 | 3.55 | 250mW | -25 | 12.8 | -74 | 45 | -123 | 160 | |||
+23 | 3.20 | 200mW | -26 | 11.5 | -75 | 40 | -124 | 141 | |||
+22 | 2.80 | 160mW | -27 | 10.0 | -76 | 35 | -125 | 128 | |||
+21 | 2.52 | 125mW | -28 | 8.9 | -77 | 32 | -126 | 117 | |||
+20 | 2.25 | 100mW | -29 | 8.0 | -78 | 29 | -127 | 100 | |||
+19 | 2.00 | 80 mW | -30 | 7.1 | .001mW | -79 | 25 | -128 | 90 | ||
+18 | 1.80 | 64 mW | -31 | 6.25 | -80 | 22.5 | .01 nW | -129 | 80 | .1ƒW | |
+17 | 1.60 | 50 mW | -32 | 5.8 | -81 | 20.0 | -130 | 71 | |||
+16 | 1.41 | 40 mW | -33 | 5.0 | -82 | 18.0 | -131 | 61 | |||
+15 | 1.25 | 32 mW | -34 | 4.5 | -83 | 16.0 | -132 | 58 | |||
+14 | 1.15 | 25 mW | -35 | 4.0 | -84 | 11.1 | -133 | 50 | |||
+13 | 1.00 | 20 mW | -36 | 3.5 | -85 | 12.9 | -134 | 45 | |||
+12 | .90 | 16 mW | -37 | 3.2 | -86 | 11.5 | -135 | 40 | |||
+11 | .80 | 12.5mW | -38 | 2.85 | -87 | 10.0 | -136 | 35 | |||
+10 | .71 | 10 mW | -39 | 2.5 | -88 | 9.0 | -137 | 33 | |||
+9 | .64 | 8 mW | -40 | 2.25 | .1uW | -89 | 8.0 | -138 | 29 | ||
+8 | .58 | 6.4 mW | -41 | 2.0 | -90 | 7.1 | .001 nW | -139 | 25 | ||
+7 | .500 | 5 mW | -42 | 1.8 | -91 | 6.1 | -140 | 23 | .01ƒW | ||
+6 | .445 | 4 mW | -43 | 1.6 | -92 | 5.75 | |||||
+5 | .400 | 3.2 mW | -44 | 1.4 | -93 | 5.0 | |||||
+4 | .355 | 2.5 mW | -45 | 1.25 | -94 | 4.5 | |||||
+3 | .320 | 2.0 mW | -46 | 1.18 | -95 | 4.0 | |||||
+2 | .280 | 1.6 mW | -47 | 1.00 | -96 | 3.51 | |||||
+1 | .252 | 1.25 mW | -48 | 0.90 | -97 | 3.2 |
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