The YouTube Playlist Calculator is a free online tool that allows users to easily calculate the total duration of any public YouTube playlist. By simply copying and pasting the playlist URL, users can quickly determine the playlist length, adjust playback speeds, and select or deselect specific videos for a customized calculation. This tool is particularly useful for planning viewing times, organizing content consumption, and managing educational playlists. It ensures high accuracy by fetching data directly from YouTube's API and is accessible on both desktop and mobile devices.