dBm to Watt
Converter
Convert dBm to Watt, Watt to dBm, and mW to dBm instantly with
high accuracy. Essential RF power calculator for telecom,
wireless, WiFi, and RF engineering.
dBm to Watt
Watt to dBm
mW to dBm
Enter Power in dBm
dBm
⇄
Power in Watt
1
W
Power in mW
1000
mW
P(W) = 10(dBm/10) / 1000
Quick Reference (dBm to Watt)
| dBm | Watt | mW |
|---|---|---|
| 0 dBm | 0.001 W | 1 mW |
| 10 dBm | 0.01 W | 10 mW |
| 20 dBm | 0.1 W | 100 mW |
| 30 dBm | 1 W | 1000 mW |
| 40 dBm | 10 W | 10000 mW |
| 43 dBm | 20 W | 20000 mW |
What is dBm?
dBm (decibel-milliwatt) is a logarithmic unit used to express
power level relative to 1 milliwatt (mW). It is widely used in
RF, microwave, and telecom systems to represent signal power.
0 dBm = 1 milliwatt
10 dBm = 10 milliwatts
20 dBm = 100 milliwatts
30 dBm = 1 watt
Every increase of 10 dB = 10x power increase
Frequently Asked Questions
dBm is a logarithmic unit used to measure RF power relative to 1 milliwatt.
Use the formula:
P(W) = 10^(dBm/10) / 1000.
dBm helps represent RF signal power efficiently using logarithmic scaling.
30 dBm equals 1 watt or 1000 milliwatts.
43 dBm is approximately equal to 20 watts.
dB measures ratio while dBm measures absolute power referenced to 1mW.
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