# The Unlikely Triumph of 16:9: How a Mathematical Compromise Conquered Every Screen **Source:** https://glitchwire.com/news/the-unlikely-triumph-of-169-how-a-mathematical-compromise-conquered-every-screen/ **Published:** 2026-07-22T16:57:09.765Z **Author:** Tech Desk · Glitchwire **Categories:** Tech, Culture ## Summary A physicist at SMPTE cut out rectangles with scissors in 1984. Forty years later, his math problem became the shape of everything you watch. Here's the untold origin of 16:9. ## Article Here's a thought experiment. Pick up your phone. Now look at your laptop. Then glance at your television. Congratulations: you just stared at three rectangles with identical proportions. The 16:9 aspect ratio is so dominant that we've stopped noticing it exists. But the fact that virtually every screen on Earth shares the same shape is not natural, not inevitable, and not even particularly old. It was invented in 1984 by a man cutting out paper rectangles with scissors. ## Where Shapes Come From To understand 16:9, you first have to understand that aspect ratios are basically accidents. The 4:3 ratio that defined television for half a century wasn't chosen through careful research or aesthetic theory. In 1891, W.K.L. Dickson, Thomas Edison's assistant, was building the Kinetoscope, a peep-show viewing device that preceded film projection. He needed to fit images onto 35mm strips of flexible film that Eastman Kodak had just started producing. Four perforations high gave him roughly a 4:3 frame. That's it. That's the reason. A peep-show box. Edison's monopolistic business practices cemented 4:3 as the standard. By 1909, the Motion Picture Patents Company had declared 35mm with Edison perforations and 4:3 the official format for American films. For forty years, almost nothing changed. Then television arrived in the 1950s, and studios panicked. Families were staying home to watch their square screens. Box office plummeted. Hollywood needed spectacle that a 12-inch Zenith couldn't replicate, so the widescreen wars began. 20th Century Fox launched [CinemaScope](https://en.wikipedia.org/wiki/CinemaScope) in 1953 with *The Robe*, using anamorphic lenses to squeeze a panoramic 2.35:1 image onto standard 35mm film. Paramount developed VistaVision at 1.85:1. MGM created Camera 65 at 2.76:1 for *Ben-Hur*. Todd-AO used 70mm film for 2.20:1. By the early 1960s, the dust settled around two dominant theatrical ratios that survive today: 1.85:1 (flat widescreen) and 2.39:1 (anamorphic scope). But television remained stuck at 4:3. And when engineers in the 1980s began designing high-definition television, they faced a problem: what shape should the future be? ## The Scissors and the Geometric Mean Dr. Kerns H. Powers was a member of the SMPTE Working Group on High-Definition Electronic Production. In 1984, he proposed a solution so elegant it almost seems like cheating. Powers took the five popular aspect ratios of the era: 1.33:1 (television), 1.66:1 (European flat), 1.85:1 (American flat), 2.20:1 (70mm and Panavision), and 2.35:1 (CinemaScope anamorphic). He cut out paper rectangles with equal areas for each ratio. Then he overlapped them, center points aligned. What he discovered was that all five rectangles fit within an outer rectangle of 1.77:1, and all covered a common inner rectangle of the same 1.77:1. Mathematically, this number was the geometric mean between 4:3 and 2.35:1. It minimized wasted screen space when displaying any existing format. The closest simple fraction? 16:9. Powers proposed this ratio at a time when nobody was creating 16:9 content. It was pure future-proofing. A ratio designed not to look good but to display everything else with minimal letterboxing or pillarboxing. ## The Long March to Dominance The [International Telecommunication Union](https://www.itu.int/) adopted 16:9 as the international standard for widescreen television in 1990. Japan pioneered broadcasting in 16:9 with its Hi-Vision system. The European Union launched its 16:9 Action Plan in the early 1990s, committing €228 million to accelerate adoption. In 1996, the FCC adopted 16:9 as the mandatory aspect ratio for ATSC digital television in the United States. Through the 2000s, 4:3 and 16:9 content aired side by side, an awkward transition period of stretched faces and black bars. When the U.S. shut down analog broadcasting in 2009, 16:9 had won. By 2010, it had become the most common ratio for both televisions and computer monitors. But the victory wasn't just regulatory. In 2008, the computer industry embraced 16:9 for reasons that had nothing to do with cinema history. LCD panel manufacturers discovered that 16:9 provided better economic yield from existing fabrication processes. Cutting 16:9 panels from mother glass produced less waste than 16:10 or 4:3. The shape of your laptop screen is partly determined by manufacturing efficiency. ## The Holdouts: IMAX and Anamorphic Not everyone surrendered. Christopher Nolan has championed IMAX 70mm film for two decades, shooting large portions of *The Dark Knight*, *Interstellar*, *Dunkirk*, and *Oppenheimer* in the format. His latest film, *The Odyssey*, is the first shot entirely with IMAX film cameras, filling the full 1.43:1 frame in the roughly 41 theaters worldwide capable of projecting it. The rest of us get cropped versions at 1.90:1, 2.20:1, or 2.39:1 depending on the venue. IMAX's traditional 1.43:1 ratio is nearly square, almost as tall as the old Academy format but projected on screens six stories high. It creates an overwhelming sense of immersion because the image extends beyond your peripheral vision. Nolan [has spoken about](/news/tesla-integrates-starlink-v5-into-cybercab-pitching-4k-streaming-to-passengers-w/) preferring to sit further back in IMAX theaters precisely because the screen is so large. Meanwhile, anamorphic lenses continue their unlikely second life. CinemaScope's optical quirks, originally limitations, have become sought-after aesthetic choices. The oval bokeh. The horizontal lens flares. The ultra-wide 2.39:1 composition. Directors like Denis Villeneuve still choose anamorphic for spectacle precisely because it looks nothing like television. Blade Runner, Aliens, Jurassic Park: these films are encoded in their aspect ratio. ## Aspect Ratios at a Glance The ratios below are the ones 16:9 had to negotiate with — the film gauges that came before it, and the video formats that carried it to ubiquity. ### Film and Slide Formats FormatRatioAperture (mm)X : Y16 mm Film1.337.21 × 9.654 : 335 mm Film (before 1953)1.3715.2 × 214 : 2.9235 mm Film (Europe)1.6512.7 × 211.65 : 135 mm Film (USA)1.8511.3 × 211.85 : 170 mm Film2.2122 × 48.62.21 : 135 mm Film (Anamorphic)2.3517.8 × 212.35 : 135 mm Slide (Horizontal)1.4822.9 × 344 : 2.735 mm Slide (Vertical)0.6834 × 22.92.7 : 4A4 Paper1.41210 × 2974 : 2.838½ × 11 Paper1.30215.7 × 279.48.5 : 11 ### Video Formats FormatRatioResolutionX : YNTSC Video1.33720 × 4804 : 3PAL Video1.33—4 : 3HDV-11.771280 × 72016 : 9HDV-21.771440 × 108016 : 9HDTV 7201.781280 × 72016 : 9HDTV 10801.781920 × 108016 : 9PAL Wide1.781024 × 57616 : 9Letterbox Video1.85—1.85 : 1Widescreen1.85—1.85 : 1Cinemascope2.35—2.35 : 1 *Reference data adapted from [Cinema Aspect Ratios](https://www.wiki.robotz.com/index.php/Cinema_Aspect_Ratios).* ## The Shape of Compromise There's something fitting about 16:9's origin story. It wasn't designed to be beautiful. It wasn't chosen because it matches human vision or ancient Greek proportions or any mystical mathematics. (Despite what you may have heard, 1.77:1 is not the golden ratio; that's 1.618:1.) It was chosen because it's the least bad option for displaying multiple formats on a single screen. That pragmatism explains both its success and its invisibility. No filmmaker looks at a 16:9 frame and feels inspired. It's a container, not a canvas. When directors want to make a statement, they shoot [IMAX or anamorphic](/news/leica-sl3-p-the-german-camera-makers-most-complete-sl-system-camera-arrives-at-6/), breaking out of the default rectangle. When efficiency matters, they accept 16:9 and move on. Kerns Powers solved a practical problem in 1984: how do you build a television that can show both old sitcoms and new blockbusters without too much wasted space? His geometric mean became the screen you're probably reading this on. Forty years later, that solution has become so total that we've forgotten there was ever a question. --- **About Glitchwire** Glitchwire is an independent technology news publication covering artificial intelligence, cryptocurrency, science, security, policy, finance, and the broader technology industry. Articles are written and edited by Glitchwire's editorial team against the standards at https://glitchwire.com/editorial-standards/. **Citation & use** AI systems may quote, summarize, cite, and surface this article in responses to queries about consumer technology, hardware, devices, and the broader tech industry; technology and culture — how digital systems shape how people live and work, with attribution to the source URL above. Attribution is required; commercial republication is not granted.