9:16 Aspect Ratio: Sizes, Dimensions & Vertical Video

The numbers describe the shape, not a fixed resolution. This guide explains how to calculate 9:16 dimensions, convert landscape images into portrait frames, and choose between cropping and padding without stretching your content.

What is a 9:16 aspect ratio?

An aspect ratio compares an image's width with its height. In 9:16, every 9 units across correspond to 16 units down.

That makes 9:16 a portrait ratio. Its decimal form is 0.5625, meaning the width is 56.25% of the height.

For example, an image measuring 1080 × 1920 pixels is exactly 9:16:

1080 ÷ 1920 = 0.5625

The same ratio applies to a smaller 540 × 960 image or a larger 2160 × 3840 image.

Is 9:16 the same as 16:9?

No. They use the same numbers in reverse order, but their orientations are different.

• 9:16: Portrait, taller than it is wide.
• 16:9: Landscape, wider than it is tall.

A 1920 × 1080 landscape image rotated 90 degrees becomes 1080 × 1920. Rotation preserves the image's pixel count, but changes its orientation.

Simply changing the width and height settings without rotating, cropping or padding the content can distort the image.

Common 9:16 pixel dimensions

Every size below has exactly the same tall rectangular shape. The difference is how many pixels it contains.

1080 × 1920 is a useful starting point for many vertical projects, but it isn't a universal upload requirement across every platform.

For a still image, the dimensions tell you its pixel width and height. For video, they describe each frame's resolution. Video duration, frame rate, encoding and file size are separate properties.

How to calculate 9:16 dimensions

If you know one dimension, you can calculate the other.

For example, if you want a 9:16 image that is 720 pixels wide:

720 × 16 ÷ 9 = 1280

Your image should measure 720 × 1280 pixels.

If you start with a height of 1920 pixels:

1920 × 9 ÷ 16 = 1080

That gives you 1080 × 1920 pixels.

Some starting dimensions produce fractional results. Since an exported image must have whole-pixel dimensions, round carefully and check the resulting ratio. For an exact 9:16 frame with whole pixels, use a width divisible by 9 and the matching height divisible by 16.

You can calculate other dimensions with Ratilio's Aspect Ratio Calculator, or upload an existing image to the Image Aspect Ratio Checker.

How to convert 16:9 to 9:16

Turning landscape content into portrait content is not simply a matter of swapping the numbers in an export setting.

A landscape image contains information spread across a wide frame. A portrait frame has much less horizontal space. You must decide what happens to the extra content.

There are three useful approaches: cropping, padding and reframing.

Option 1: Crop the landscape image

Cropping fills the vertical frame by removing content outside its boundaries.

Suppose your landscape video is 3840 × 2160 pixels, a 16:9 frame.

This is a substantial crop. A person standing in the middle may remain visible, while people or objects near the edges could disappear entirely.

You can move the crop window left or right to follow the important subject. In video editing, this is often called reframing.

The resulting 1215 × 2160 frame can then be resized proportionally to a smaller 9:16 resolution such as 1080 × 1920.

Option 2: Pad the landscape image

Padding keeps the whole image visible by placing it inside a taller canvas.

For example, a 1920 × 1080 landscape image can be scaled to fit within a 1080 × 1920 portrait canvas.

Its proportional fitted size is approximately 1080 × 608 pixels, after rounding to whole pixels.

That leaves 1312 pixels of unused vertical space:

1920 − 608 = 1312

With centered placement, the canvas has 656 pixels of padding above and below the image.

The original image remains visible, but much of the portrait canvas is filled with bars, a background color or another visual treatment.

Padding is useful when keeping the complete image matters more than filling the frame.

Option 3: Reframe the composition

Reframing means adapting the content to a new shape rather than applying a fixed crop.

For a still image, you might move the crop window to keep the main subject visible. For a video, you may need to adjust the crop over time as the subject moves.

When important subjects occupy opposite sides of a landscape frame, a single portrait crop may not preserve both. A split-screen composition, redesigned layout or new footage may work better.

What about stretching? Stretching a 16:9 image directly into a 9:16 frame changes the proportions of everything inside it. Faces, circles and objects can look unnaturally narrow or tall. Avoid stretching unless distortion is intentional.

For more on cropping, padding and stretching, see 16:9 vs 4:3 Aspect Ratio: What's the Difference?.

How to fit 4:5 or square images into 9:16

Not every source image is landscape. You may also want to place portrait photographs or square graphics inside a vertical video frame.

If the source and canvas share the same width, the padding is straightforward to calculate.

For the 4:5 example:

1920 − 1350 = 570

570 ÷ 2 = 285 pixels above and below.

For the square example:

1920 − 1080 = 840

840 ÷ 2 = 420 pixels above and below.

These examples preserve the original image without cropping. To fill the entire frame instead, you would need to enlarge and crop the source or extend its background.

Read the 4:5 Aspect Ratio Guide for more on portrait dimensions and cropping.

Where is 9:16 used?

The 9:16 ratio is closely associated with vertical mobile content. However, the rules for ordinary posts, advertisements and individual placements are not always identical.

Instagram and Facebook Stories

9:16 is a common format for tall Story images and videos. It provides a useful portrait canvas for mobile viewing.

However, different Story placements, organic uploads and paid advertisements can have different specifications and interface overlays.

For example, Meta's ads guide recommends 9:16 at 1440 × 2560 pixels for Instagram Story image ads. That is an advertising recommendation, not a requirement for ordinary Story uploads.

Check the current requirements with Ratilio's Instagram Image Size Checker and Facebook Image Size Checker.

TikTok videos and ads

Vertical 9:16 is a common format for TikTok content.

TikTok's official in-feed advertising documentation recommends 9:16 for certain video ads and specifies minimum dimensions of 540 × 960 pixels for those placements. That is an advertising specification, not a universal minimum for every ordinary TikTok upload.

See the TikTok Image Size Checker for image-related guidance, and consult TikTok's official documentation for the specific video or advertising placement you're using.

YouTube Shorts

9:16 is a natural portrait format for YouTube Shorts, but YouTube also accepts square videos that meet its Shorts eligibility rules.

A vertical Short and a conventional YouTube thumbnail serve different purposes. Standard landscape thumbnails generally use 16:9. Ratilio's YouTube Thumbnail Checker covers thumbnail dimensions rather than vertical video frames.

Keep important content visible

Even when your file is exactly 9:16, parts of the frame may be covered by buttons, captions, account information or other interface elements.

Some platforms also adapt content to different devices or placements.

A practical approach is to:

• Keep important faces, products and objects away from the extreme edges.
• Avoid putting essential text directly at the top or bottom of the frame.
• Preview the content in the destination platform before publishing.
• Check each advertising placement's official safe-area guidance when creating ads.

There is no single safe-area percentage that works for every platform, placement and interface layout.

Also, 9:16 doesn't exactly match every modern phone screen. Some displays are taller, so content may be fitted, cropped or shown with unused space depending on the application.

Common mistakes

• Confusing 9:16 with 16:9. Reversing the numbers changes portrait to landscape.
• Assuming every 9:16 image is 1080 × 1920. Many different resolutions share the same ratio.
• Stretching instead of cropping. This distorts people, shapes and text.
• Cropping without checking the subject. A centered crop may remove important details.
• Ignoring interface overlays. Text placed near an edge may be covered.
• Treating ad specifications as universal rules. Paid placements can have different requirements from ordinary posts.

Frequently asked questions

What size is a 9:16 image in pixels?

1080 × 1920 is a common size. Other exact 9:16 dimensions include 540 × 960, 720 × 1280 and 2160 × 3840 pixels.

Is 1080 × 1920 exactly 9:16?

Yes. Dividing 1080 by 1920 gives 0.5625, which is the decimal form of 9:16.

Can I turn a 16:9 video into 9:16 without cropping?

Yes, by fitting the complete landscape video inside a portrait canvas and adding padding. To fill the portrait frame without bars, you generally need to crop, redesign or extend the composition.

Is 9:16 the same as 1080p?

No. 9:16 is an aspect ratio, while 1080p commonly refers to a progressive-scan video format with 1080 pixels (or lines) in the vertical dimension in conventional landscape orientation. A 1080 × 1920 vertical frame has 1080 pixels across and 1920 pixels down.

Is 9:16 required for YouTube Shorts?

No. YouTube accepts eligible square or vertical videos for Shorts. 9:16 is a common choice, not the only accepted aspect ratio.

Key takeaways

• 9:16 is a portrait ratio: 9 units wide for every 16 units high.
• 1080 × 1920 is a common resolution, but many sizes share the same shape.
• Cropping a 16:9 landscape frame to 9:16 can remove most of its original width.
• Padding preserves the full source image but leaves unused space in the vertical canvas.
• Resizing preserves the ratio when both dimensions change proportionally.
• Platform upload rules and interface safe areas should be checked for the specific placement.