mW to dBm Conversion Calculator
Accurately convert power units, supporting quick calculations between milliwatts (mW) and decibel-milliwatts (dBm)
Unit Conversion
mW
dBm
Bidirectional Conversion
Conversion Formulas
dBm = 10 × log₁₀(mW)
mW = 10^(dBm / 10)
Common Conversions
| mW | dBm |
|---|---|
| 0.001 mW | -30 dBm |
| 0.01 mW | -20 dBm |
| 0.1 mW | -10 dBm |
| 1 mW | 0 dBm |
| 10 mW | 10 dBm |
| 100 mW | 20 dBm |
| 1000 mW | 30 dBm |
Power Comparison Chart
About Power Units
Milliwatts (mW)
A milliwatt is a unit of power equal to one-thousandth of a watt (1 mW = 0.001 W). It is commonly used to represent small power levels in devices such as radio equipment, fiber optic communications, and electronic circuits.
Decibel-milliwatts (dBm)
dBm is a relative power unit referenced to 1 milliwatt. It is commonly used in communications and radio engineering because it can conveniently represent a wide range of power values on a logarithmic scale and simplifies calculations of gain and loss.
