Calculator
9:16 Aspect Ratio Calculator & Image Resizer
Work out full-screen vertical dimensions in seconds. Enter a width or height, pick a common preset, and resize your own image to fit - the standard format for Stories, TikTok, and Reels.
Enter dimensions
Result
1080 x 1920 px
≈ 2.1 megapixels
Preview
Resize an image to 9:16
Upload a photo and resize it to exactly 1080 x 1920px at 9:16 - drag to reposition, then download.
Common sizes - tap to use
| Name | Category | Resolution | Megapixels | |
|---|---|---|---|---|
| Instagram Story | Social | 1080 x 1920 | 2.1 MP | |
| TikTok Video | Social | 1080 x 1920 | 2.1 MP | |
| YouTube Shorts | Social | 1080 x 1920 | 2.1 MP | |
| Facebook Story | Social | 1080 x 1920 | 2.1 MP | |
| Snapchat | Social | 1080 x 1920 | 2.1 MP | |
| Phone Wallpaper (HD) | Wallpaper | 1170 x 2532 | 3.0 MP |
What Is 9:16 Aspect Ratio?
The 9:16 aspect ratio is a tall, full-screen vertical format, exactly the inverse of the 16:9 widescreen standard. It fills an entire phone screen top to bottom, which is why it became the default shape for Stories, Reels, TikTok, and YouTube Shorts.
Because it takes up the whole screen with no cropping or black bars, 9:16 content tends to feel more immersive than square or landscape formats, especially for video-first platforms designed to be watched one-handed.
9:16 vs Other Ratios
9:16 is the tallest of the common social formats, built to fill a phone screen completely. Here is how it compares:
Square post
Portrait feed post
Full-screen (this ratio)
Who Uses 9:16?
Instagram & Facebook Stories
The required format for full-screen Stories on Instagram and Facebook.
TikTok Videos
TikTok's native vertical video format, optimised for one-handed phone viewing.
YouTube Shorts & Reels
The standard shape for short-form vertical video across YouTube and Instagram.
Phone Wallpapers
Matches the screen ratio of most modern smartphones.
Need a different format or a smaller file size?
Once you've resized your image above, you can convert it to another format or compress it for free with Crest Convert - everything runs in your browser, so your files never get uploaded anywhere.
More Aspect Ratio Calculators
Frequently Asked Questions
Why is 9:16 used for Stories and TikTok?
9:16 fills a phone screen completely from top to bottom with no black bars, since it's the mirror image of the 16:9 landscape ratio most phone screens are built around. That makes it the natural shape for full-screen, one-handed vertical video.
What resolution should I use for Instagram Stories?
Instagram recommends 1080 x 1920 pixels for Stories. Anything close to this ratio will display correctly, but this exact size gives the sharpest result.
Is 9:16 the same for TikTok and Reels?
Yes. TikTok, Instagram Reels, and YouTube Shorts all use the same 9:16 vertical format at a recommended 1080 x 1920 resolution, so content can usually be reused across all three with minimal changes.
How do I turn a landscape photo into 9:16?
You'll need to crop significantly from the sides, since 9:16 is much taller than it is wide. Consider whether your subject will still work once most of the width is removed, or add a blurred background fill instead of cropping.
What's the difference between 9:16 and 16:9?
They're the same ratio in opposite orientations. 16:9 is the widescreen landscape format used by YouTube and TVs, while 9:16 is its vertical mirror used by Stories, TikTok, and Reels.
What image formats can I upload?
JPG, PNG, WebP, GIF, BMP, and HEIC (the format iPhones save photos in) up to 50MB. HEIC files are decoded right in your browser, so nothing is ever uploaded to a server - the same as every other format here.