What is the 9:16 aspect ratio?

The 9:16 ratio means for every 9 units of width there are 16 units of height. It is the standard portrait orientation used by smartphones and vertical video platforms like TikTok, Instagram Reels, and YouTube Shorts.

What is the most common 9:16 resolution?

1080×1920 pixels is the most common full-HD 9:16 resolution. For 4K vertical video, 2160×3840 is used. Smaller sizes like 720×1280 are common for web and mobile.

How do I calculate a missing dimension for 9:16?

To find height from width: multiply width by 16, then divide by 9. To find width from height: multiply height by 9, then divide by 16. This calculator does that automatically.

Is 9:16 the same as 16:9 rotated?

Yes. 9:16 is simply the landscape 16:9 ratio rotated 90 degrees into portrait orientation. The width and height values are swapped.

Can I use any unit, not just pixels?

Yes. The ratio is unit-agnostic. You can enter values in pixels, millimeters, centimeters, or inches and the result will be in the same unit.

9:16 Aspect Ratio Calculator

Enter a width or height and instantly get the matching dimension for a perfect 9:16 portrait aspect ratio.

Calculate Dimensions

Width (px)

Ratio Preview

9:16

16:9

Common 9:16 Presets

Platform / Use	Width	Height
TikTok / Reels / Shorts (HD)	1080	1920
720p Vertical Video	720	1280
4K Vertical (UHD)	2160	3840
Instagram Story (1080×1920)	1080	1920
2K QHD Vertical	1440	2560
qHD Portrait	540	960

Click a row to load that width into the calculator.

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Summary

The 9:16 aspect ratio is the standard for portrait (vertical) video used across TikTok, Instagram Reels, YouTube Shorts, and smartphone screens. This calculator lets you enter either a width or a height and instantly computes the missing dimension so your video or canvas always fits the ratio perfectly. It also shows the most common preset sizes for quick reference.

How it works

Choose whether you want to enter a width or a height.
Type the known dimension in pixels (or any unit).
The calculator instantly computes the other dimension using the 9:16 ratio.
Copy the result or pick a common preset from the reference table.

Use cases

Size a canvas for TikTok or Instagram Reels videos.
Calculate frame dimensions for YouTube Shorts.
Resize a vertical banner or poster to fit a phone screen.
Check crop dimensions before editing in Premiere, DaVinci, or CapCut.
Verify dimensions for full-screen mobile ads.
Scale story graphics for Snapchat or WhatsApp Status.

Frequently Asked Questions

Last updated: 2026-05-29 · Reviewed by Nham Vu