# YouTube Playlist Length & Time Calculator

> 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.

Canonical page: [https://chrome-stats.com/d/watchtime-calc](https://chrome-stats.com/d/watchtime-calc)

## Overview

- **ID:** `watchtime-calc`
- **Platform:** Firefox
- **Type:** Firefox add-on
- **Status:** Available
- **Publisher:** Androdom
- **Category:** language-support,photos-music-videos
- **Daily users:** 31
- **Weekly downloads:** 5
- **Rating:** 5.00 / 5 (1 ratings)
- **Version:** 2.1.3
- **Last updated:** 2026-06-21
- **First published:** 2026-03-19
- **Size:** 2.97 MB
- **Data as of:** 2026-09-09
- **Store listing:** [Firefox Add-ons Store](https://addons.mozilla.org/firefox/addon/watchtime-calc/)
- **Website:** [https://github.com/Androdom/playlist-watchtime/issues](https://github.com/Androdom/playlist-watchtime/issues)

## Description

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.

## Rankings

- #20,081 — Overall
- #41 — calculator
- #43 — playlist
- #51 — calculus
- #207 — layout

## Permissions and access

### Permissions

- `storage`

### Host permissions

- `*://*.youtube.com/*`

### Content script matches

- `*.youtube.com`

## Safety

- **Risk impact:** Moderate risk impact
- **Risk likelihood:** Moderate risk likelihood

### Analysis details

- Request access to the following domains: youtube.com
- This extension has low user count. Unpopular extensions may not be stable or safe.

> Some risk analysis details are omitted from this free response. [Upgrade to view the full analysis](https://chrome-stats.com/pricing).

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Source: [Chrome-Stats](https://chrome-stats.com/d/watchtime-calc)