Watt to dBm conversion calculator

Convert power in watts to decibels relative to one milliwatt (dBm). This calculator is useful for RF and communication engineers.

Input Parameters

Calculation Results

Calculation Result

-- dBm --

Where:
P(dBm) = 10 * log10(1000 * P(W))
P(dBm) is the power level in dBm.
P(W) is the power level in watts.

Watt to dBm conversion calculator Calculator Usage Guide

Learn how to use the Watt to dBm conversion calculator and its working principles

How to Use the Calculator

  1. Enter the power level in watts (W) in the input field.
  2. Click the "Calculate" button to perform the conversion.
  3. The result in dBm will be displayed in the result field.
  4. Use the "Reset" button to clear the input and result fields.

Working Principle

The conversion from watts (W) to decibels relative to one milliwatt (dBm) is based on the formula: P(dBm) = 10 * log10(1000 * P(W))

This formula converts the power in watts to a logarithmic scale, which is more suitable for expressing small power levels in telecommunications and RF engineering.

Example

If the input power is 0.001 watts (1 milliwatt), the calculation will be: P(dBm) = 10 * log10(1000 * 0.001) = 10 * log10(1) = 0 dBm