4:3 Aspect Ratio Calculator

What Is the 4:3 Aspect Ratio?

The 4:3 aspect ratio — spoken as "four by three" — means the image is 4 units wide for every 3 units tall. It's also written as 1.33:1, and in the film world it's called the Academy ratio. For decades, this was simply the shape of a screen. If you watched TV or used a computer before roughly 2005, you were looking at a 4:3 display.

This ratio traces back to the earliest days of cinema. Thomas Edison and William Dickson chose it for 35mm film in the 1890s, and it stuck. When the Academy of Motion Picture Arts and Sciences standardized film formats in 1932, they codified 4:3 as the official aspect ratio for movies. It remained the default until Hollywood started experimenting with wider formats like CinemaScope in the 1950s to compete with television.

Television adopted the same 4:3 ratio when broadcasts began in the 1940s, creating a seamless connection between film and TV. The CRT monitors that dominated computing from the 1980s through the 2000s used 4:3 as well. It wasn't until the mid-2000s that 16:9 widescreen started replacing 4:3 as the standard for both TV and computer displays.

Where 4:3 Still Gets Used

Presentations and Slides: PowerPoint and Google Slides both offer 4:3 as a slide format, and it's still the default in many corporate environments. Older projectors and conference room screens often use 4:3 natively, so building your presentation in this format avoids awkward black bars or cropped content.

iPad and Tablets: Apple's iPad line has used a 4:3 display ratio since the original iPad launched in 2010. This makes the iPad feel balanced for both portrait and landscape use — reading in portrait mode feels natural, while landscape works well for apps and video. Many Android tablets also use ratios close to 4:3.

Retro Gaming and Emulation: Classic video game consoles (NES, SNES, Sega Genesis, PlayStation 1, N64) all output in 4:3. If you're emulating retro games or playing on original hardware through a capture card, maintaining the correct 4:3 ratio prevents the image from looking stretched. Retro gaming communities are strict about this — a stretched 4:3 game on a widescreen monitor is considered a cardinal sin.

Security Cameras and CCTV: Many security camera systems still record in 4:3, especially older installations. The ratio works well for monitoring because it captures more vertical space relative to width, which is useful for doorways, hallways, and indoor areas where height matters as much as width.

Photography and Print: While most digital cameras shoot in 3:2, some medium format cameras and many scanning workflows produce 4:3 images. Standard photo print sizes like 8×6 inches also map to a 4:3 ratio, making it a natural fit for print work.

Common 4:3 Resolutions

These are the most widely used 4:3 resolutions across displays, video standards, and legacy hardware.

4:3 vs 16:9: What's the Difference?

The key difference is width. A 16:9 display is about 33% wider than a 4:3 display at the same height. At 1024 pixels wide, a 4:3 screen is 768 pixels tall, while a 16:9 screen would be only 576 pixels tall. The widescreen format trades vertical space for a broader horizontal view.

For watching modern content, 16:9 wins hands down — nearly all TV shows, YouTube videos, and streaming content are produced in 16:9 or wider. Playing 16:9 content on a 4:3 display results in letterboxing (black bars above and below), while playing 4:3 content on a 16:9 display creates pillarboxing (black bars on the sides).

But 4:3 has advantages in specific situations. Its more square shape is better for reading documents, browsing web pages, and working with portrait-oriented content. That's exactly why the iPad uses 4:3 — it's a better shape for holding a device that switches between portrait and landscape constantly. If you're working with legacy content, old photos, or classic games, 4:3 is the correct format to preserve the original framing.

4:3 in Film and TV History

The 4:3 aspect ratio dominated visual media for the better part of a century. Silent films in the 1890s and early 1900s were shot at ratios close to 4:3, and the Academy standardized it at exactly 1.375:1 in 1932. Every movie from "Casablanca" to "The Wizard of Oz" to "Citizen Kane" was framed for a 4:3 screen.

When television arrived in the 1940s, engineers chose 4:3 to match the existing film standard. This meant movies could air on TV without format conversion. For roughly 60 years, every TV show — from "I Love Lucy" to "Seinfeld" to "The Office" (early seasons) — was filmed in 4:3.

The transition to widescreen happened gradually. The FCC mandated 16:9 as the standard for digital television in the late 1990s, and HD broadcasts in 16:9 began ramping up in the early 2000s. By 2009, the analog TV shutdown in the US effectively ended the era of 4:3 television. Today, some filmmakers deliberately choose 4:3 for artistic purposes - Wes Anderson's "The Grand Budapest Hotel" and the TV series "Ozark" (Season 4) used 4:3 framing to create a specific visual mood. The Academy ratio remains one of the most historically significant standards in filmmaking.

Frequently Asked Questions