How to calculate 16:9 dimensions
- The ratio is already set to 16:9. Type a width to get the height, or a height to get the width.
- Read the full size in the status line. If the exact value is not a whole pixel, it tells you what it was rounded from.
- Click Copy CSS for aspect-ratio: 16 / 9, or compare your size with the standard resolutions in the table below.
Why use this tool
YouTube uploads and thumbnails
YouTube’s player is 16:9 and accepts uploads up to 8K (7680 × 4320); the table below lists the common sizes from 640 × 360 up. Thumbnails are 1280 × 720. Check that an export or a custom crop lands exactly on 16:9 so the player shows no black bars.
Video exports and screen recordings
Editors and screen recorders ask for a width and a height. Enter the width you want and get the height that keeps 16:9, so the video is not stretched or letterboxed when it plays.
TVs and presentation screens
HD and 4K televisions, most conference-room displays and the default slide size in PowerPoint and Google Slides are 16:9. Size slides, signage and dashboards to fill the screen edge to edge.
Responsive video embeds
An embedded video should keep its shape at any width. Copy aspect-ratio: 16 / 9 onto the iframe or its wrapper and the browser works out the height.
Private by design
Every calculation runs in this browser tab, so results update the moment you change a value. There is nothing to upload, no account to create and nothing to install.
Good to know
The formula. Height = width × 9 ÷ 16, and width = height × 16 ÷ 9. A 1280-pixel-wide video is 1280 × 9 ÷ 16 = 720 pixels tall.
Getting whole pixels. A width that is a multiple of 16 always gives a whole-pixel height: 1280 → 720, 1920 → 1080. Other widths are rounded to the nearest pixel, and the status line shows the exact value, as in “height rounded from 562.5” for a width of 1000.
Even numbers for video. Most H.264 and H.265 encoders need an even width and height, because colour is usually stored at half resolution. If the calculator gives an odd number, such as 563, use the even number next to it (562 or 564) when you export.
480p is not quite 16:9. 854 × 480 is the usual widescreen 480p size, but it reduces to 427:240, slightly wider than 16:9. An exact 16:9 frame 480 pixels tall would be 853.33 pixels wide, and 854 is the nearest even width.
Changing the ratio. The ratio boxes are editable, so you can switch to another ratio on this page. The Find the ratio of a size box checks whether an existing file is 16:9, and names 16:9 when the size is within 1% of it.
In — Ratio 16:9, width typed
1000Out — Status line
1000 × 563 px · ratio 16:9 · height rounded from 562.5| Name | Resolution | Exact ratio | Typical use |
|---|---|---|---|
| nHD (360p) | 640 × 360 | 16:9 | Small embedded players, previews |
| FWVGA (480p) | 854 × 480 | 427:240 | Standard-definition widescreen video |
| HD (720p) | 1280 × 720 | 16:9 | HD video, video calls, YouTube thumbnails |
| Full HD (1080p) | 1920 × 1080 | 16:9 | Most monitors, TVs and video uploads |
| QHD (1440p) | 2560 × 1440 | 16:9 | Gaming and design monitors |
| 4K UHD (2160p) | 3840 × 2160 | 16:9 | 4K TVs, streaming, camera footage |
| 8K UHD (4320p) | 7680 × 4320 | 16:9 | 8K TVs, high-end cameras |
Frequently asked questions
What is the height of a 16:9 image that is 1920 pixels wide?
1080 pixels: 1920 × 9 ÷ 16 = 1080. The same rule gives 720 for a width of 1280 and 2160 for a width of 3840.
Is 16:9 the same as 1920 × 1080?
1920 × 1080 is one 16:9 size, called Full HD or 1080p. 16:9 is the shape; any width and height in that proportion share it, from 640 × 360 to 7680 × 4320.
Which resolution should I upload to YouTube?
Upload at the resolution you recorded or edited in, as long as it is 16:9: 1920 × 1080 and 3840 × 2160 are the most common. YouTube creates the lower resolutions itself. A video in another shape is shown with bars or adapted by the player.
What is the difference between 16:9 and 16:10?
16:10 (1.6:1) is slightly taller than 16:9 (1.78:1). Many laptops use 16:10, for example 1920 × 1200 or 2560 × 1600, which gives extra vertical space. A 16:9 video on a 16:10 screen shows thin bars above and below.