Heights for 640 wide
A 640px-wide frame is common. Pick the ratio you need - the paired height is already computed below for every ratio RatioCalc supports.
All heights for 640 wide
| Ratio | Height for 640 | Pair | CSS |
|---|---|---|---|
| 16:9 | 360px | 640x360 | aspect-ratio: 16 / 9 |
| 4:3 | 480px | 640x480 | aspect-ratio: 4 / 3 |
| 1:1 | 640px | 640x640 | aspect-ratio: 1 / 1 |
| 9:16 | 1138px | 640x1138 | aspect-ratio: 9 / 16 |
| 21:9 | 274px | 640x274 | aspect-ratio: 21 / 9 |
| 3:2 | 427px | 640x427 | aspect-ratio: 3 / 2 |
| 16:10 | 400px | 640x400 | aspect-ratio: 16 / 10 |
| 4:5 | 800px | 640x800 | aspect-ratio: 4 / 5 |
| 2:1 | 320px | 640x320 | aspect-ratio: 2 / 1 |
| 239:100 | 268px | 640x268 | aspect-ratio: 239 / 100 |
| 32:9 | 180px | 640x180 | aspect-ratio: 32 / 9 |
| 5:4 | 512px | 640x512 | aspect-ratio: 5 / 4 |
| 2:3 | 960px | 640x960 | aspect-ratio: 2 / 3 |
| 18:9 | 320px | 640x320 | aspect-ratio: 18 / 9 |
| 5:3 | 384px | 640x384 | aspect-ratio: 5 / 3 |
| 1:2 | 1280px | 640x1280 | aspect-ratio: 1 / 2 |
Formula - same for every ratio
height = 640 x rh / rw
// e.g. 16:9 - 640x9/16 = 360px - padding-top 56.25%
modern: .frame { aspect-ratio: rw / rh; width: 640px }
Known exact 640-wide resolutions
- 640x480 - 640×480 VGA - VGA, 4:3 retro
- 640x1136 - 640×1136 iPhone 5 - iPhone 5/SE portrait
How to use this page
- Find your ratio (16:9 for YouTube, 1:1 for square avatars, 9:16 for Stories, 4:5 for portrait feed).
- Read the height next to it - e.g. 640 at 4:5 is 800 portrait, 640 at 32:9 is 180 super-ultrawide.
- Export at 640x(paired height) exactly - or halve both sides for a lighter proxy with the same ratio.
Other widths
Match with height hubs
Tip: mastering at 640? The table rounds to the nearest pixel; verify with height = 640 x rh / rw for print-critical work.