Xiaomi Redmi Note 9 Pro: CSS viewport of 393 × 873 px, resolution and responsive test

Xiaomi · Android 10.0 · Smartphone · 2020

Released in 2020, Xiaomi Redmi Note 9 Pro features a CSS viewport of 393 x 873 pixels. Here are all its display characteristics and how to check the responsive rendering of your site on this model.

Test your site on Xiaomi Redmi Note 9 Pro directly in your browser, without buying the device.

  • Over 70 devices included, including a model with the same format
  • Real viewport, User-Agent, and touch events
  • Also works on localhost and in pre-production
  • Exportable screenshots and videos
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Why test your site on Xiaomi Redmi Note 9 Pro?

Very elongated screen

With a ratio of 20:9, Xiaomi Redmi Note 9 Pro displays a lot of height for little width. Sections designed in landscape become endless columns, and full-screen visuals are poorly cropped.

2.75x density

With a density of 2.75x, Xiaomi Redmi Note 9 Pro provides a useful benchmark to ensure your images remain sharp without serving unnecessarily large files.

Actual media queries

The 393 x 873 pixels viewport of Xiaomi Redmi Note 9 Pro rarely matches the round breakpoints of frameworks. It is precisely between these values that layouts break.

CSS viewport resolution of Xiaomi Redmi Note 9 Pro

This resolution is what your stylesheet actually manipulates. It determines the applied breakpoint, the number of displayed columns, and the size of your images.

  • 393 pixels in width
  • 873 pixels in height

The height remains indicative: Safari, Chrome, and other mobile browsers reduce the visible area with their address bar, which folds on scroll.

Be cautious when analyzing your statistics: some tools only report the manufacturer resolution, never the CSS viewport presented here.

Pixel density of Xiaomi Redmi Note 9 Pro

2.75

The device pixel ratio of Xiaomi Redmi Note 9 Pro is 2.75.

Each CSS pixel is thus rendered by 2.75 physical pixels, making any image provided in simple resolution immediately visible.

Manufacturer resolution of Xiaomi Redmi Note 9 Pro

This is the number of physical pixels on the screen, as announced by the manufacturer. Useful for preparing your image exports, useless for your media queries.

  • 1080 pixels in width
  • 2400 pixels in height
  • 20:9 Screen ratio

395 pixels per inch (ppi) · 6.7 inches diagonal, or 16.9 cm

Media queries and code snippets for Xiaomi Redmi Note 9 Pro

These snippets are generated from the exact characteristics of Xiaomi Redmi Note 9 Pro. Copy them directly into your stylesheet or configuration.

CSS media query

Targets screens whose width matches that of Xiaomi Redmi Note 9 Pro and models of the same format.

@media only screen and (min-width: 393px) and (max-width: 872px) {
  /* Xiaomi Redmi Note 9 Pro */
}

Density media query

Serves high-resolution images to screens of at least 2.75x.

@media only screen and (-webkit-min-device-pixel-ratio: 2.75),
       only screen and (min-resolution: 264dpi) {
  /* High-density images and icons */
}

Tailwind configuration

Adds a named breakpoint at the exact width of Xiaomi Redmi Note 9 Pro.

// tailwind.config.js
module.exports = {
  theme: {
    screens: {
      'xiaomi-redmi-note-9-pro': '393px'
    }
  }
}

JavaScript detection

Detects format and density client-side.

const isDeviceWidth = window.matchMedia('(min-width: 393px)').matches;
const isHighDensity = window.devicePixelRatio >= 2.75;

Meta viewport tag

Essential for Xiaomi Redmi Note 9 Pro to use its CSS viewport and not a simulated width of 980 pixels.

<meta name="viewport" content="width=device-width, initial-scale=1">

Free Xiaomi Redmi Note 9 Pro simulator

Mobile FIRST does not yet include Xiaomi Redmi Note 9 Pro, but a model with the same format is available. You can already validate your breakpoints and display density.

This is where the difference with Chrome DevTools' responsive mode is seen: DevTools resizes a window, the extension replicates the device's browser and allows exporting shareable screenshots and videos.

  1. 01 Install the extension Add Mobile FIRST to Chrome, Firefox, or Edge. Installation is free and requires no account.
  2. 02 Open the page to test Go to the URL to check, including a local address like localhost:3000.
  3. 03 Choose Xiaomi Redmi Note 9 Pro Select Xiaomi Redmi Note 9 Pro from the list of devices. The viewport switches to 393 x 873 pixels, and the mobile User-Agent is applied.
  4. 04 Check rendering Scroll, change orientation, test your forms, then capture an image or video to share.

Comparison with similar models

The neighboring formats of Xiaomi Redmi Note 9 Pro are the ones to test right after, as they reveal poorly placed breakpoints.

Comparison of resolutions of Xiaomi Redmi Note 9 Pro and nearby models
Model CSS Viewport Pixel density Manufacturer resolution
Xiaomi Redmi Note 9 Pro 393 x 873 2.75x 1080 x 2400
Xiaomi Mi 11i 360 x 800 3x 1080 x 2400
Apple iPhone 12 390 x 844 3x 1170 x 2532
Apple iPhone 12 Pro 390 x 844 3x 1170 x 2532
Xiaomi Redmi Note 7 393 x 851 2.75x 1080 x 2340
Xiaomi Redmi Note 8 393 x 851 2.75x 1080 x 2340
Google Pixel 5 393 x 851 2.75x 1080 x 2340

Frequently asked questions about Xiaomi Redmi Note 9 Pro

What is the CSS viewport resolution of Xiaomi Redmi Note 9 Pro?

The CSS viewport of Xiaomi Redmi Note 9 Pro measures 393 pixels wide and 873 pixels high. This is the width to use for defining your media queries, not the manufacturer's resolution.

What is the pixel density of Xiaomi Redmi Note 9 Pro?

The device pixel ratio of Xiaomi Redmi Note 9 Pro is 2.75. Each CSS pixel is thus displayed by 2.75 physical pixels, requiring you to provide your images in 2.75x to keep them sharp.

What is the screen resolution of Xiaomi Redmi Note 9 Pro?

The panel of Xiaomi Redmi Note 9 Pro displays 1080 x 2400 physical pixels. This is the value reported by most analytics tools, while your CSS works on a viewport of 393 x 873 pixels.

How to test my site on Xiaomi Redmi Note 9 Pro without the device?

Install the Mobile FIRST extension on Chrome, Firefox, or Edge, then select Xiaomi Redmi Note 9 Pro. Your page displays in a viewport of 393 x 873 pixels with the corresponding mobile User-Agent, in two clicks and for free.

What is the difference with Chrome DevTools' responsive mode?

DevTools resizes the window and applies partial emulation. Mobile FIRST additionally applies the User-Agent of Xiaomi Redmi Note 9 Pro, touch events, scroll behavior, and the actual appearance of the device, and allows capturing directly usable images and videos.

Can I test a localhost address on Xiaomi Redmi Note 9 Pro?

Yes. The extension works on any URL open in your browser, including localhost:3000, 127.0.0.1, or a password-protected pre-production environment.

Do you need to buy a Xiaomi Redmi Note 9 Pro to test your site?

No. The simulation covers the vast majority of development needs at no cost. A final test on a real device is still recommended before critical production deployment, but it's no longer necessary for each iteration.

Which media query to use to target Xiaomi Redmi Note 9 Pro?

A media query on the exact width targets Xiaomi Redmi Note 9 Pro: @media only screen and (min-width: 393px). Combine it with the pixel density to precisely target this model and those sharing its format.

Continue testing on another model

All Xiaomi resolutions → All devices →

Other Xiaomi models

Test your site on 77 devices, directly in your browser

Without buying a single phone, without creating an account.

  • 77 devices available upon installation
  • Real viewport, User-Agent, and touch events
  • Also works on localhost and in pre-production
  • Exportable screenshots and videos
Install the extension

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