4:3 Aspect Ratio Calculator for YouTube

Instructions

1. Enter the original width (W1) and height (H1).
2. Enter either the new width (W2) or new height (H2) to compute the other.
3. Change values at any time — use Reset to restore defaults.

YouTube Aspect Ratio Guide

YouTube is the world's largest video platform, and using the correct aspect ratio is vital for ensuring your videos look professional on every device, from TVs to smartphones.

Standard YouTube Videos (16:9)

The standard and most common aspect ratio for YouTube videos is 16:9. This widescreen format is the default for the YouTube player on desktop and looks best on television screens.

When uploading a 16:9 video, YouTube recommends the following resolutions:

• 4K: 3840x2160 pixels
• 1440p (2K): 2560x1440 pixels
• 1080p (Full HD): 1920x1080 pixels
• 720p (HD): 1280x720 pixels

YouTube Shorts (9:16)

For YouTube Shorts, the required format is a vertical video. The optimal aspect ratio is 9:16, with a recommended resolution of 1080x1920 pixels. This ensures your content fills the entire screen on mobile devices, providing an immersive experience similar to TikTok and Instagram Reels.

Shorts Best Practices & Details:

• Maximum Duration: Shorts can be up to 60 seconds long. However, highly engaging Shorts are often much shorter, typically 15-30 seconds.
• File Format: MP4 is the recommended file format.
• Safe Zones: Be mindful of "safe zones" where text and key visuals might be obscured by the YouTube player's UI (e.g., channel name, like/dislike buttons). Keep important elements away from the very top and bottom of the frame.
• Content Strategy: Focus on quick, captivating content that grabs attention immediately.

Visual Aspect Ratio Examples

What About Other Ratios?

YouTube is flexible and will automatically adapt videos with different aspect ratios. If you upload a video that isn't 16:9 (like a 4:3 or 1:1 square video), the YouTube player will add black bars to the sides (pillarboxing) or top and bottom (letterboxing) to fit the frame. While this works, it's generally best to produce content in the native 16:9 or 9:16 formats for the best viewer experience.

Use Our Calculator

Need to calculate the dimensions for a 16:9 video? Use our dedicated calculator to get it right every time.

Go to YouTube Aspect Ratio Calculator

The 4:3 aspect ratio, often called "fullscreen" or "standard definition," was the universal standard for television and computer monitors for decades. While widescreen (16:9) is now dominant, 4:3 remains relevant for its classic, retro feel and its use in specific photography formats.

What is the 4:3 Aspect Ratio?

The 4:3 aspect ratio was the standard for 20th-century television (NTSC, PAL) and early computer displays. It provides a more squarish frame compared to modern widescreen formats. For every 4 units of width, there are 3 units of height.

Common resolutions for a 4:3 display include 640x480 (VGA), 800x600 (SVGA), and 1024x768 (XGA).

Why 4:3 is Still Relevant

• Retro Aesthetic: It instantly gives video content a vintage or classic TV show feel.
• Photography Standard: It's the native aspect ratio for Micro Four Thirds cameras and is a common option in many digital cameras.
• iPad Displays: Apple's iPads use a 4:3 aspect ratio, making it ideal for apps and content designed for those devices.

How 4:3 Interacts with Widescreen

When you display a 4:3 video on a modern 16:9 screen (like a TV or YouTube), you will see black bars on the left and right sides. This effect is called pillarboxing. Conversely, if you watch a 16:9 video on a 4:3 screen, you'll see black bars on the top and bottom, known as letterboxing.

Frequently Asked Questions (FAQ)

What is a common 4:3 resolution?

Common 4:3 resolutions include 640x480 (SD), 800x600, and 1024x768. These were standards for older computer monitors and standard-definition television.

Should I use 4:3 for YouTube?

Generally, no. YouTube's player is 16:9, so uploading a 4:3 video will result in pillarboxing (black bars on the sides). It should only be used if you are intentionally aiming for a retro or specific artistic style.

What is the difference between pillarboxing and letterboxing?

Pillarboxing adds black bars to the sides of the content to fit a wider screen (e.g., 4:3 video on a 16:9 screen). Letterboxing adds black bars to the top and bottom to fit a taller screen (e.g., 16:9 video on a 4:3 screen).