2:1 Aspect Ratio Calculator + Bulk Resizer
Work out any 2:1 dimension, then resize or crop a whole folder of images to match — free, in your browser.
Work out any 2:1 dimension, then resize or crop a whole folder of images to match — free, in your browser.
The 2:1 aspect ratio is exactly twice as wide as it is tall. Vittorio Storaro promoted it as "Univisium," a compromise between cinema and television, and streaming productions adopted it widely — a lot of Netflix originals are shot 2:1. It is also the workhorse ratio for web banners and social headers, where you need width without eating vertical space.
| Resolution | Name | Category | Megapixels | Resize to this size |
|---|---|---|---|---|
| 2048x1024 | Univisium 2K | Video | 2.1 MP | Resize to this — 2048 by 1024 pixels, Univisium 2K |
| 3840x1920 | Univisium 4K | Video | 7.4 MP | Resize to this — 3840 by 1920 pixels, Univisium 4K |
| 1500x750 | X / Twitter Header | Social | 1.1 MP | Resize to this — 1500 by 750 pixels, X / Twitter Header |
| 1200x600 | Web Banner | Screen | 0.7 MP | Resize to this — 1200 by 600 pixels, Web Banner |
| 1920x960 | Hero Image | Screen | 1.8 MP | Resize to this — 1920 by 960 pixels, Hero Image |
| 2400x1200 | Retina Hero | Screen | 2.9 MP | Resize to this — 2400 by 1200 pixels, Retina Hero |
| 1080x540 | Social Landscape | Social | 0.6 MP | Resize to this — 1080 by 540 pixels, Social Landscape |
| 5120x2560 | 5K Cinematic Master | Video | 13.1 MP | Resize to this — 5120 by 2560 pixels, 5K Cinematic Master |
The Univisium format used across many Netflix and streaming originals
Full-width headers that stay wide without pushing content below the fold
X/Twitter headers and similar profile banners sit close to 2:1
A clean, mathematically simple crop for wide landscape shots
It is cinematographer Vittorio Storaro's name for 2:1, proposed as a truce between cinema's 2.39:1 and television's 16:9. Neither side has to letterbox much. Streaming picked it up because the same master looks reasonable on a TV and a phone.
Yes. 16:9 is 1.78:1 and 2:1 is, well, 2.0:1. Going from 16:9 to 2:1 means shaving roughly 11% off the height. It is a much gentler cut than going to 21:9.
1920x960 covers most desktop viewports, and 2400x1200 gives you a retina-quality version. Keep anything important away from the far left and right — narrow viewports crop banners from the edges inward.
Take about 25% off the height. Landscapes handle this well since the interest usually sits in a horizontal band anyway. Portraits and anything with a subject near the top or bottom will need checking individually.
Yes — 18:9 simplifies to 2:1. A run of phones marketed as "18:9" around 2017-2018 were exactly 2:1. Manufacturers have since drifted to taller shapes like 19.5:9 and 20:9.