YouTube Playlist Length & Time Calculator

Name: YouTube Playlist Length & Time Calculator
Rating: 5 (1 reviews)
Author: Androdom

Calculate exact YouTube playlist length at custom playback speeds (1.25x, 2x). Your ultimate YouTube playlist time calculator to track exactly how much watch time you save! Features 16 languages, dark mode, and custom video range selection.

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Features & Capabilities

Have you ever looked at a YouTube playlist with 150 videos and wondered precisely how long it would take to finish? Or how much time you would save if you watched it at 1.5x speed?

YouTube Playlist Length & Time Calculator automatically answers this for you! It injects a highly polished, non-intrusive calculator panel natively into any YouTube playlist page. It detects timestamps of loaded videos and calculates the total duration—dynamically adjusted to your playback speed!

🌟 Key Features Live Calculation: Instantly calculates the duration of loaded videos. Playback Speed Modifiers: View exact completion times for 1x, 1.25x, 1.5x, 2x, or your own custom speed. Precise Video Ranges: Set a custom subset range to calculate watch time for a specific chunk of the playlist. Premium Themes: Includes Light, Dark, and OLED (Pure Black) modes. Massive Localization: Fully natively translated into 16 languages (including Turkish, English, Portuguese, Chinese, Italian, Spanish, French, German, and more). Privacy First: 100% local processing. Zero data collection, analytics, or telemetry.

User Growth & Download Statistics

Add-on

By:

Daily users:

Rating:

Version:

2.1.2 Last updated: 2026-04-15

Version code:

6221918

Creation date:

2026-03-19

Risk:

Permissions:

storage

Host permissions:

*://*.youtube.com/*

Content scripts matches:

*.youtube.com

Size:

71.52KB

URLs:

Website

Full description:

Source:

Firefox Add-ons Store

Data ingested on:

2026-06-17

Compare stats and ranking:

Ranking

# 28,290 ▲ 1,961

Other rankings

#46 in playlist keyword 22 ▲ 3#53 in calculator keyword 35 ▲ 4#69 in calculus keyword 10 ▲ 2#231 in layout keyword 20 ▲ 16

For Developers

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Contact the developer

Chrome-Stats does not own this Firefox add-on. Please use these information below to contact the Firefox add-on developer.

Developed by:

Androdom

Firefox Add-ons Store

https://addons.mozilla.org/firefox/addon/watchtime-calc/

Website:

https://github.com/Androdom/playlist-watchtime/issues

User Reviews

I was tempted to write my own version of this but the author of this add-on beat me to it, and with more features than I would have included! It's kinda crazy this isn't built-in YouTube functionality.

by Mi*****, 2026-05-18

View all user reviews ›

Is YouTube Playlist Length & Time Calculator Safe?

Risk impact

Risk impact measures the level of extra permissions an extension has access to. A low risk impact extension cannot do much harms, whereas a high risk impact extension can do a lot of damage like stealing your password, bypassing your security settings, and accessing your personal data. High risk impact extensions are not necessarily malicious. However, if they do turn malicious, they can be very harmful.

YouTube Playlist Length & Time Calculator requires a few sensitive permissions. Exercise caution before installing.

Risk impact analysis details

Critical Request access to the following domains: youtube.com
High ******* ******* **** *** ****** ***** *** ***** ** ******* **** ********* ********* ** * *********** *****

Risk likelihood

Risk likelihood measures the probability that a Firefox add-on may turn malicious. This is determined by the publisher and the Firefox add-on reputation on Firefox Add-ons Store, the amount of time the Firefox add-on has been around, and other signals about the Firefox add-on. Our algorithms are not perfect, and are subject to change as we discover new ways to detect malicious extensions. We recommend that you always exercise caution when installing a Firefox add-on.

YouTube Playlist Length & Time Calculator is recently added, and hasn't been around long enough for us to gather enough data to accurately assess its risk level.

Risk likelihood analysis details

High This extension has low user count. Unpopular extensions may not be stable or safe.
Medium **** ********* *** ******* ** *** **** * ******* *** ******* *** *** ** ****** ** *****
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