DecibelWatt to Decibelmilliwatt Converter

Convert power levels from decibels per watt (dBW) to decibels per milliwatt (dBm) using this calculator.

Input Parameters

Calculation Results

Calculation Results

Calculation Formula

dBm = dBW + 30

Where:
dBW is the power level in decibels per watt.
dBm is the power level in decibels per milliwatt.

DecibelWatt to Decibelmilliwatt Converter Calculator Usage Guide

Learn how to use the DecibelWatt to Decibelmilliwatt Converter calculator and its working principles

How to Use the Calculator

  1. Enter the power level in decibels per watt (dBW) in the input field.
  2. Click the "Calculate" button to convert the dBW value to decibels per milliwatt (dBm).
  3. The result will be displayed in the dBm field.

Working Principle

The conversion from dBW to dBm is based on the relationship between watts and milliwatts. Since 1 milliwatt is equal to 0.001 watts, adding 30 to the dBW value gives the equivalent dBm value. This is because a 10 dB increase corresponds to a tenfold increase in power, and since 1 watt is 1000 milliwatts, an additional 30 dB is needed to account for the milliwatt scale.

Example

If you have a power level of 5 dBW, the equivalent in dBm would be:

dBm = 5 dBW + 30 = 35 dBm