dB与倍数换算速查表计算公式： dB = 10log （P1/P2）P1/P2：是功率的倍数示例：P1为2W，P2为1W10log （2W/1W）=10 log（2）=3dB即3dB代表2倍此外，当有dBm减dBm时，得到的结果为dB, 如：15dBm-9dBm=6dBdB与倍数换算速查表（功率）dB倍数dB倍数dB倍数01 16.141 19.1823216.242 19.2834.8316.343 19.2846416.444 19.3857516.545 19.3867.8616.646 19.4878.5716.747 19.4889816.848 19.5899.5916.949 19.59010101750 19.69110.41117.151 19.69210.81217.252 19.79311.11317.253 19.79411.51417.354 19.89511.81517.455 19.896121617.556 19.99712.31717.657 19.99812.61817.658 209912.81917.759 20100132017.860 2320013.22117.961 24.830013.42217.962 2640013.6231863 2750013.82418.164 27.8600142518.165 28.570014.12618.266 2980014.32718.367 29.590014.52818.368 30100014.62918.469 33200014.83018.570 34.8300014.93118.571 36400015.13218.672 37500015.23318.673 37.8600015.33418.774 38.5700015.43518.875 39800015.63618.876 39.5900015.73718.977 401000015.83818.978 5010000015.9391979 16401980 。