Decibel milliwatt to decibel watt converter

Convert power levels from decibel milliwatts (dBm) to decibel watts (dBW) using this calculator. This tool is useful for RF engineering, telecommunications, and audio systems where power levels are often expressed in logarithmic units.

Input Parameters

Calculation Results

Calculation Results

Calculation Formula

dBW = dBm - 30

Where:
dBm: Power level in decibels relative to one milliwatt
dBW: Power level in decibels relative to one watt

Decibel milliwatt to decibel watt converter Calculator Usage Guide

Learn how to use the Decibel milliwatt to decibel watt converter calculator and its working principles

How to Use This Calculator

  1. Enter the power level in decibel milliwatts (dBm) in the input field.
  2. Click the "Calculate" button to convert the value to decibel watts (dBW).
  3. The result will be displayed in the dBW field.
  4. Use the "Reset" button to clear all fields and start over.

Working Principle

The conversion between dBm and dBW is based on the logarithmic relationship between milliwatts and watts:

1 watt = 1000 milliwatts

Since the logarithm of 1000 is approximately 3, a decibel value in dBm is 30 dB higher than the equivalent value in dBW:

dBW = dBm - 30

Practical Applications

This calculator is particularly useful in:

  • RF engineering and wireless communications
  • Audio system design where power levels are specified in logarithmic units
  • Antenna system analysis
  • Network performance monitoring

Example

If you have a power level of 20 dBm, the equivalent in dBW would be:

dBW = 20 - 30 = -10 dBW