dBm to watts Converter
Convert dBm to watts instantly with a reference conversion table.
| dBm | watts |
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How to convert dBm to watts
Enter your value
Type the number of dbm you want to convert into the left box. The result in watts appears instantly in the right box. You can also type into the right box to convert in the other direction.
Use the swap button
Click the ⇄ Swap button to reverse the conversion — watts to dBm. Your current value carries across so you don't have to re-enter anything.
About dBm and watts
dBm and watts are common power measurements.
0 dBm = 1 mW. Wi-Fi signal strength: −50 dBm is excellent (0.01 μW), −70 dBm is acceptable (0.1 nW), −90 dBm is barely usable. dBm is logarithmic: +10 dBm = ×10 the power, +3 dBm ≈ ×2.
Frequently asked questions
How do I convert dBm to watts?
Use the calculator above to convert dBm to watts instantly.
How many watts are in 1 dBm?
Use the calculator above to find the exact conversion.
Is the dBm to watts converter free?
Yes, the dBm to watts converter is completely free with no sign-up required, no downloads, and it works offline once the page has loaded.