This tool converts Power in dBm to Voltage.
The voltage represents the root-mean-square value or VRMS.
The default impedance (Z) is 50 ohm, although you can change that to any value.
Formula
VRMS = SQRT(Z/1000)*10(PdBm/20)
Example Calculation
1 dBm into a 50 ohm impedance translates to Voltage of 251 millivolt.
The same power into half the impedance value (25 ohm) gives 177 mV.
dBm to Volt Conversion Table
This table shows dBm values and their equivalent in Volt.
| dBm | Volt |
|---|---|
| -174 | 4.4615E-10 |
| -173 | 5.0059E-10 |
| -172 | 5.6167E-10 |
| -171 | 6.3021E-10 |
| -170 | 7.0711E-10 |
| -169 | 7.9339E-10 |
| -168 | 8.9019E-10 |
| -167 | 9.9881E-10 |
| -166 | 1.1207E-09 |
| -165 | 1.2574E-09 |
| -164 | 1.4109E-09 |
| -163 | 1.5830E-09 |
| -162 | 1.7762E-09 |
| -161 | 1.9929E-09 |
| -160 | 2.2361E-09 |
| -159 | 2.5089E-09 |
| -158 | 2.8150E-09 |
| -157 | 3.1585E-09 |
| -156 | 3.5439E-09 |
| -155 | 3.9764E-09 |
| -154 | 4.4615E-09 |
| -153 | 5.0059E-09 |
| -152 | 5.6167E-09 |
| -151 | 6.3021E-09 |
| -150 | 7.0711E-09 |
| -149 | 7.9339E-09 |
| -148 | 8.9019E-09 |
| -147 | 9.9881E-09 |
| -146 | 1.1207E-08 |
| -145 | 1.2574E-08 |
| -144 | 1.4109E-08 |
| -143 | 1.5830E-08 |
| -142 | 1.7762E-08 |
| -141 | 1.9929E-08 |
| -140 | 2.2361E-08 |
| -139 | 2.5089E-08 |
| -138 | 2.8150E-08 |
| -137 | 3.1585E-08 |
| -136 | 3.5439E-08 |
| -135 | 3.9764E-08 |
| -134 | 4.4615E-08 |
| -133 | 5.0059E-08 |
| -132 | 5.6167E-08 |
| -131 | 6.3021E-08 |
| -130 | 7.0711E-08 |
| -129 | 7.9339E-08 |
| -128 | 8.9019E-08 |
| -127 | 9.9881E-08 |
| -126 | 1.1207E-07 |
| -125 | 1.2574E-07 |
| -124 | 1.4109E-07 |
| -123 | 1.5830E-07 |
| -122 | 1.7762E-07 |
| -121 | 1.9929E-07 |
| -120 | 2.2361E-07 |
| -119 | 2.5089E-07 |
| -118 | 2.8150E-07 |
| -117 | 3.1585E-07 |
| -116 | 3.5439E-07 |
| -115 | 3.9764E-07 |
| -114 | 4.4615E-07 |
| -113 | 5.0059E-07 |
| -112 | 5.6167E-07 |
| -111 | 6.3021E-07 |
| -110 | 7.0711E-07 |
| -109 | 7.9339E-07 |
| -108 | 8.9019E-07 |
| -107 | 9.9881E-07 |
| -106 | 1.1207E-06 |
| -105 | 1.2574E-06 |
| -104 | 1.4109E-06 |
| -103 | 1.5830E-06 |
| -102 | 1.7762E-06 |
| -101 | 1.9929E-06 |
| -100 | 2.2361E-06 |
| -99 | 2.5089E-06 |
| -98 | 2.8150E-06 |
| -97 | 3.1585E-06 |
| -96 | 3.5439E-06 |
| -95 | 3.9764E-06 |
| -94 | 4.4615E-06 |
| -93 | 5.0059E-06 |
| -92 | 5.6167E-06 |
| -91 | 6.3021E-06 |
| -90 | 7.0711E-06 |
| -89 | 7.9339E-06 |
| -88 | 8.9019E-06 |
| -87 | 9.9881E-06 |
| -86 | 1.1207E-05 |
| -85 | 1.2574E-05 |
| -84 | 1.4109E-05 |
| -83 | 1.5830E-05 |
| -82 | 1.7762E-05 |
| -81 | 1.9929E-05 |
| -80 | 2.2361E-05 |
| -79 | 2.5089E-05 |
| -78 | 2.8150E-05 |
| -77 | 3.1585E-05 |
| -76 | 3.5439E-05 |
| -75 | 3.9764E-05 |
| -74 | 4.4615E-05 |
| -73 | 5.0059E-05 |
| -72 | 5.6167E-05 |
| -71 | 6.3021E-05 |
| -70 | 7.0711E-05 |
| -69 | 7.9339E-05 |
| -68 | 8.9019E-05 |
| -67 | 9.9881E-05 |
| -66 | 1.1207E-04 |
| -65 | 1.2574E-04 |
| -64 | 1.4109E-04 |
| -63 | 1.5830E-04 |
| -62 | 1.7762E-04 |
| -61 | 1.9929E-04 |
| -60 | 2.2361E-04 |
| -59 | 2.5089E-04 |
| -58 | 2.8150E-04 |
| -57 | 3.1585E-04 |
| -56 | 3.5439E-04 |
| -55 | 3.9764E-04 |
| -54 | 4.4615E-04 |
| -53 | 5.0059E-04 |
| -52 | 5.6167E-04 |
| -51 | 6.3021E-04 |
| -50 | 7.0711E-04 |
| -49 | 7.9339E-04 |
| -48 | 8.9019E-04 |
| -47 | 9.9881E-04 |
| -46 | 1.1207E-03 |
| -45 | 1.2574E-03 |
| -44 | 1.4109E-03 |
| -43 | 1.5830E-03 |
| -42 | 1.7762E-03 |
| -41 | 1.9929E-03 |
| -40 | 2.2361E-03 |
| -39 | 2.5089E-03 |
| -38 | 2.8150E-03 |
| -37 | 3.1585E-03 |
| -36 | 3.5439E-03 |
| -35 | 3.9764E-03 |
| -34 | 4.4615E-03 |
| -33 | 5.0059E-03 |
| -32 | 5.6167E-03 |
| -31 | 6.3021E-03 |
| -30 | 7.0711E-03 |
| -29 | 7.9339E-03 |
| -28 | 8.9019E-03 |
| -27 | 9.9881E-03 |
| -26 | 1.1207E-02 |
| -25 | 1.2574E-02 |
| -24 | 1.4109E-02 |
| -23 | 1.5830E-02 |
| -22 | 1.7762E-02 |
| -21 | 1.9929E-02 |
| -20 | 2.2361E-02 |
| -19 | 2.5089E-02 |
| -18 | 2.8150E-02 |
| -17 | 3.1585E-02 |
| -16 | 3.5439E-02 |
| -15 | 3.9764E-02 |
| -14 | 4.4615E-02 |
| -13 | 5.0059E-02 |
| -12 | 5.6167E-02 |
| -11 | 6.3021E-02 |
| -10 | 7.0711E-02 |
| -9 | 7.9339E-02 |
| -8 | 8.9019E-02 |
| -7 | 9.9881E-02 |
| -6 | 1.1207E-01 |
| -5 | 1.2574E-01 |
| -4 | 1.4109E-01 |
| -3 | 1.5830E-01 |
| -2 | 1.7762E-01 |
| -1 | 1.9929E-01 |
| 0 | 2.2361E-01 |
| 1 | 2.5089E-01 |
| 2 | 2.8150E-01 |
| 3 | 3.1585E-01 |
| 4 | 3.5439E-01 |
| 5 | 3.9764E-01 |
| 6 | 4.4615E-01 |
| 7 | 5.0059E-01 |
| 8 | 5.6167E-01 |
| 9 | 6.3021E-01 |
| 10 | 7.0711E-01 |
| 11 | 7.9339E-01 |
| 12 | 8.9019E-01 |
| 13 | 9.9881E-01 |
| 14 | 1.1207E+00 |
| 15 | 1.2574E+00 |
| 16 | 1.4109E+00 |
| 17 | 1.5830E+00 |
| 18 | 1.7762E+00 |
| 19 | 1.9929E+00 |
| 20 | 2.2361E+00 |
| 21 | 2.5089E+00 |
| 22 | 2.8150E+00 |
| 23 | 3.1585E+00 |
| 24 | 3.5439E+00 |
| 25 | 3.9764E+00 |
| 26 | 4.4615E+00 |
| 27 | 5.0059E+00 |
| 28 | 5.6167E+00 |
| 29 | 6.3021E+00 |
| 30 | 7.0711E+00 |
| 31 | 7.9339E+00 |
| 32 | 8.9019E+00 |
| 33 | 9.9881E+00 |
| 34 | 1.1207E+01 |
| 35 | 1.2574E+01 |
| 36 | 1.4109E+01 |
| 37 | 1.5830E+01 |
| 38 | 1.7762E+01 |
| 39 | 1.9929E+01 |
| 40 | 2.2361E+01 |
| 41 | 2.5089E+01 |
| 42 | 2.8150E+01 |
| 43 | 3.1585E+01 |
| 44 | 3.5439E+01 |
| 45 | 3.9764E+01 |
| 46 | 4.4615E+01 |
| 47 | 5.0059E+01 |
| 48 | 5.6167E+01 |
| 49 | 6.3021E+01 |
| 50 | 7.0711E+01 |
| 51 | 7.9339E+01 |
| 52 | 8.9019E+01 |
| 53 | 9.9881E+01 |
| 54 | 1.1207E+02 |
| 55 | 1.2574E+02 |
| 56 | 1.4109E+02 |
| 57 | 1.5830E+02 |
| 58 | 1.7762E+02 |
| 59 | 1.9929E+02 |
| 60 | 2.2361E+02 |
| 61 | 2.5089E+02 |
| 62 | 2.8150E+02 |
| 63 | 3.1585E+02 |
| 64 | 3.5439E+02 |
| 65 | 3.9764E+02 |
| 66 | 4.4615E+02 |
| 67 | 5.0059E+02 |
| 68 | 5.6167E+02 |
| 69 | 6.3021E+02 |
| 70 | 7.0711E+02 |
| 71 | 7.9339E+02 |
| 72 | 8.9019E+02 |
| 73 | 9.9881E+02 |
| 74 | 1.1207E+03 |
| 75 | 1.2574E+03 |
| 76 | 1.4109E+03 |
| 77 | 1.5830E+03 |
| 78 | 1.7762E+03 |
| 79 | 1.9929E+03 |
| 80 | 2.2361E+03 |
| 81 | 2.5089E+03 |
| 82 | 2.8150E+03 |
| 83 | 3.1585E+03 |
| 84 | 3.5439E+03 |
| 85 | 3.9764E+03 |
| 86 | 4.4615E+03 |
| 87 | 5.0059E+03 |
| 88 | 5.6167E+03 |
| 89 | 6.3021E+03 |
| 90 | 7.0711E+03 |
| 91 | 7.9339E+03 |
| 92 | 8.9019E+03 |
| 93 | 9.9881E+03 |
| 94 | 1.1207E+04 |
| 95 | 1.2574E+04 |
| 96 | 1.4109E+04 |
| 97 | 1.5830E+04 |
| 98 | 1.7762E+04 |
| 99 | 1.9929E+04 |
| 100 | 2.2361E+04 |
dBm to Volt Excel Calculator
Use Excel to calculate a range of dBm to RMS Volt values. Use the following formula to calculate the value of voltage
B4 = (SQRT($B$1/1000))*10^(A4/20)
Voltage values are in Column B, while dBm values are in column A. The impedance value is fixed and in Cell B1.