mW to dBm conversion calculator
milliwatts (mW) to decibel-milliwatts (dBm), power conversion calculator.
Enter the power in mW and press the Convert button:
How to convert mW to dBm
The power P(dBm) in dBm is equal to 10 times the base 10 logarithm of the power P(mW) in milliwatts (mW) divided by 1 milliwatt (mW):
P(dBm) = 10 ⋅ log10( P(mW) / 1mW)
So,
1mW = 0dBm
Example
Convert 20mW to dBm:,
P(dBm) = 10 ⋅ log10( 20mW / 1mW) = 13.0103dBm
mW to dBm conversion table
| Power (mW) | Power (dBm) |
|---|---|
| 0+ mW | -∞ dBm |
| 0.01 mW | -20 dBm |
| 0.1 mW | -10 dBm |
| 1 mW | 0 dBm |
| 2 mW | 3.0103 dBm |
| 3 mW | 4.7712 dBm |
| 4 mW | 6.0206 dBm |
| 5 mW | 6.9897 dBm |
| 6 mW | 7.7815 dBm |
| 7 mW | 8.4510 dBm |
| 8 mW | 9.0309 dBm |
| 9 mW | 9.5424 dBm |
| 10 mW | 10 dBm |
| 100 mW | 20 dBm |
| 1000 mW | 30 dBm |
| 10000 mW | 40 dBm |
| 100000 mW | 50 dBm |
| 1000000 mW | 60 dBm |
| 10000000 mW | 70 dBm |
| 100000000 mW | 80 dBm |
| 1000000000 mW | 90 dBm |
| 10000000000 mW | 100 dBm |
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