This extension adds the percentage your volume is set at to the right of the volume bar, as seen below. It also has an edit mode, so you can precisely adjust your volume.

It also includes settings to totally hide the volume percentage, and to show/hide decimals (2 points) of the percentage.

Install from the marketplace.

Or install manually:

Copy volumePercentage.js to the spicetify extenstions folder

Run the following commands

spicetify config extensions volumePercentage.js
spicetify apply

This repo was originally forked from jamesrchen/Spicetify-volumePercent.