Power Suite

mW to dBm Converter

Convert Milliwatts (mW) to decibel-milliwatts (dBm) instantly.

Enter Value

Conversion Result

-

Formula & Conversion Step:

P(dBm) = 10 * log10(P(mW))

What is the Milliwatts to dBm Converter?

The Milliwatts (mW) to Decibel-milliwatts (dBm) converter is widely used by telecommunications and radio-frequency (RF) engineers. It translates linear electrical power into a logarithmic scale, which is essential for measuring signal strength in Wi-Fi routers and cell towers.

How It Works (Algorithm)

Because radio signals degrade exponentially over distance, measuring them in linear milliwatts becomes mathematically cumbersome. The calculator applies a Base-10 Logarithm to the milliwatt value and multiplies by 10 to output a highly readable, absolute dBm value.

$$ P_{(dBm)} = 10 \cdot \log_{10}(P_{(mW)}) $$

The logarithmic equation for measuring RF signal propagation.

How to Use It

Enter the absolute power in milliwatts (mW). The calculator will process the base-10 logarithm and output the power level in dBm. For example, exactly 1 mW of power converts to 0 dBm, while 100 mW converts to 20 dBm.