4:3 Aspect Ratio: The Complete Guide
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.
Use Our Calculator
Need to resize a video or image to the 4:3 aspect ratio? Use our handy calculator to find the correct dimensions.
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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).