This tool converts deciBel (dB) loss to a percentage (%) value.

**Calculator**

- Enter the dB loss value with a negative sign indicating a loss or attenuation

**Formula for Converting dB Loss to Percentage**

The relationship between **dB** and percentage power is logarithmic, and the conversion between **dB loss** and the percentage of remaining signal can be calculated using the following formula:

**Percentage of Signal Remaining = 10 ^{dB Loss/10} × 100**

To find the **percentage of signal lost**, subtract the above result from 100%:

**Percentage Loss = 100 − 10 ^{dB Loss/10} × 100**

**Example Calculation**

Let’s walk through an example of converting **-3 dB** signal loss into a percentage. Use the calculator to find the percentage loss = 49.9%

So, a **-3 dB loss** results in approximately **50% signal loss**.

**Common dB Loss Conversions**

Here are some common **dB loss to percentage** conversions for quick reference:

dB Loss | Percentage of Signal Remaining | Percentage Loss |
---|---|---|

-1 dB | 79.4% | 20.6% |

-3 dB | 50.1% | 49.9% |

-6 dB | 25.1% | 74.9% |

-10 dB | 10.0% | 90.0% |

-20 dB | 1.0% | 99.0% |

-30 dB | 0.1% | 99.9% |

**Why Convert dB Loss to Percentage?**

Converting **dB loss to percentage** helps you better visualize how much signal is lost. Decibel values are logarithmic and not always intuitive, but percentages are easier to understand in practical terms. For example:

- A
**-3 dB**loss means you’ve lost about half the signal, which is easy to grasp when expressed as a**50% loss**. - A
**-10 dB**loss translates to a 90% loss, meaning only 10% of the signal remains.

This kind of conversion is especially useful in applications like:

**Telecommunications**: Engineers need to understand how much signal strength is lost over long cables or through walls.**Audio Engineering**: dB loss in audio signals can affect the sound quality, and understanding the impact of attenuation is important for maintaining audio fidelity.**RF Engineering**: Radio frequency signals often experience dB loss due to distance or obstacles, and converting this loss into a percentage helps with better system planning and antenna placement.