This calculator is used to convert from **dB **to **Watt** as a measure of sound or noise power level.

Enter the power level in dB and the tool will provide the Watt equivalent.

**Formula**

Sound power level in Watt is determined by the following formula:

**L _{w} = L_{R}** *

**10**

^{(LwdB/10)}where

**L**_{w}_{dB}is the sound power level in deciBel.- The reference power
**L**is one trillionth of a Watt or 10_{R}^{-12}W (which is the lowest level that can be discerned by the human ear)

*Note: Sound power level is not the same as sound pressure level. However the units are the same (dB) and this calculator applies to both.*

**Example Calculation**

A turbojet engine has a sound level of **170 dB**. The calculator above can be used to find this is equivalent to **100,000 Watt**.

Human breath of one person has a sound level of **10 dB**. This is equivalent to **10 ^{-11} Watt**.

**Background**

The picture below shows the sound power level in **dB** vs the sound power level in Watt **(W)**

**Notes**

- dB is also the unit for Sound Pressure Level (SPL) sensitivity specified as dB (1W/1m) and can be computed at any distance away from the audio source.
- SPL on Wikipedia
- dB is sometimes confused with dBm
- dB can be converted to a linear power ratio. For example the ratio between output and input power to an amplifier. This ratio is also called the gain.
- Use this calculator to add audio dB values together.
**Note that it’s****not the same as adding general dB values**.