RF Power Milestone Verified: Wi-Fi / Bluetooth
+20 dBm to Watts
+20 dBm equals 0.1 Watts (100 mW). Real-world engineering benchmark: 100.0 mW (CE Maximum Wi-Fi / Bluetooth Class 1).
dBm
Reference Domain: Wi-Fi / Bluetooth
0.1 W
Milliwatts: 100 mW dBW: -10.00 dBW
Microwatts (μW)
100,000 μW
VRMS (@ 50Ω)
2.2361 V Peak-to-Peak (Vpp)
6.3246 V Voltage (dBμV)
127.0 dBμV
Exact Mathematical Derivation for +20 dBm
Step 1: P(mW) = 10^(20 / 10) = 10^(2.00) = 100 mW
Step 2: P(W) = 100 mW ÷ 1,000 = 0.1 Watts
Step 3: V_RMS (@ 50Ω) = √(1.000e-1 W × 50 Ω) = 2.2361 V RMS (127.0 dBμV)
Step 2: P(W) = 100 mW ÷ 1,000 = 0.1 Watts
Step 3: V_RMS (@ 50Ω) = √(1.000e-1 W × 50 Ω) = 2.2361 V RMS (127.0 dBμV)
Relative Delta Analysis
Adjacent Relative Power Comparisons
See how power changes when increasing or decreasing from +20 dBm by standard logarithmic step sizes:
| Delta (Δ dB) | Resulting Level (dBm) | Power in Watts | Milliwatts (mW) | Physical Effect |
|---|---|---|---|---|
| -10 dB | +10.0 dBm | 0.0100 W | 10.000 mW | 1/10th Power |
| -3 dB | +17.0 dBm | 0.0501 W | 50.119 mW | 1/2 Half Power |
| -1 dB | +19.0 dBm | 0.0794 W | 79.433 mW | -1 dB Attenuation |
| 0 dB | +20.0 dBm | 0.1000 W | 100.000 mW | Baseline Level |
| +1 dB | +21.0 dBm | 0.1259 W | 125.893 mW | +1 dB Increase |
| +3 dB | +23.0 dBm | 0.1995 W | 199.526 mW | 2× Double Power |
| +10 dB | +30.0 dBm | 1.0000 W | 1000.000 mW | 10× Power |
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Knowledge Base
Frequently Asked Questions: +20 dBm
Common questions about RF power conversions, negative dBm, and voltage calculations.
+20 dBm is exactly 0.1 Watts, which equals 100 milliwatts (mW).
100.0 mW (CE Maximum Wi-Fi / Bluetooth Class 1). In RF telecommunications, this power level is standard for Wi-Fi / Bluetooth.
At 50 Ω impedance, +20 dBm produces 2.2361 V RMS, 3.1623 V Peak, 6.3246 Vpp, and 127.0 dBμV.
+20 dBm equals -10.00 dBW (calculated by subtracting the 30 dB milliwatt offset: 20 − 30).
Doubling the power (+3 dB) increases the level to +23.0 dBm, which equals 0.2000 W (200.000 mW).