⚡ Power
dBm to watts Converter
Convert dBm to watts instantly with a reference conversion table.
dBm to watts
→
Common conversions
| dBm | watts |
|---|
Formula:
How to convert dBm to watts
1
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.
2
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.
3
About dBm and watts
dBm and watts are common power measurements.
💡 Did you know?
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.
Reviewed for 2026. dBm ↔ watts conversion factor verified against published reference data. Built by a UK-based qualified primary teacher and FA Level 2 coach as part of 247QuickTools' free utility-tools project.