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RF Unit Converter
All misc tools
Convert RF units (dBm, dBW, watts, volts).
Values
System Impedance (Ω)
Power (dBm)
Power (Watts)
Voltage (Volts RMS)
Voltage (dBuV)
Quick Reference
Wi-Fi (Max)
20 dBm
Bluetooth
4 dBm
Thermal Noise
-174 dBm
GPS Signal
-130 dBm
Common Levels
30 dBm
1 Watt
20 dBm
100 mW
10 dBm
10 mW
0 dBm
1 mW
-30 dBm
1 µW
Volts Peak-to-Peak
0.632 Vpp
For sine wave
About this calculator
Overview
RF unit conversion between dBm, dBW, watts, and volts. Essential for radio, WiFi, and telecommunications. dBm referenced to 1 milliwatt.
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Pro Tips
0 dBm = 1 mW; 30 dBm = 1 watt.
+3 dB = 2× power; +10 dB = 10× power.
50Ω standard impedance.
dB is ratio; dBm is absolute.
!
Fun Facts
"WiFi: 20-30 dBm (100-1000 mW)."
"Cell phone: 23-33 dBm typical."
"Receiver sensitivity: -90 to -120 dBm."
"Free space loss: 6 dB per doubling distance."
Formula: dBm = 10 × log10(mW); Watts = 10^(dBm/10) / 1000
