Screen Resolution Online — Check Display, Browser Size & Aspect Ratio

Why it matters

Why screen resolution matters

Screen resolution determines how much a display can show at once and how sharp it looks — it's the first thing web designers, app developers, and IT support ask for when something renders wrong. Your browser window resolution matters just as much for the web: it's what a site actually sees, and it's often smaller than your full screen if the window isn't maximized. Aspect ratio, the proportion between width and height, decides whether images and video fit naturally or end up cropped or letterboxed.

Step by step

How to check your monitor's resolution

The panel above already shows it — but if you want to check it manually inside your operating system, here's how.

On Windows

Right-click an empty area of the desktop and choose Display settings.
Under Scale & layout, find Display resolution.
The recommended value, marked "(Recommended)", matches your monitor's native resolution.

Windows 7/8 users: right-click desktop → Screen resolution.

On Mac

Open the Apple menu and go to System Settings.
Select Displays in the sidebar.
Your current resolution is listed under the display preview, next to the scaling options.

Hold Option while clicking Displays for extra detail options.

Step by step

How to check your phone's screen resolution

Most phone settings menus show the model name but not the pixel count. The fastest way to get the exact number is to open this page in your phone's browser — it reads the resolution automatically, the same way it does on desktop.

iPhone

Go to Settings → General → About to find your exact model.
Apple doesn't list resolution in pixels here — look up the model, or simply open this page on the phone.

Android

Go to Settings → Display (or About phone → Display, varies by brand).
Some manufacturers list "Screen resolution" directly; others only show a scaling option.
For the exact pixel count on any device, open this page in the phone's browser.

Reference

Common screen resolutions

How your numbers above compare to widely used display standards.

Name	Resolution	Aspect ratio
HD	1280 × 720	16:9
Full HD (1080p)	1920 × 1080	16:9
QHD (1440p)	2560 × 1440	16:9
4K UHD	3840 × 2160	16:9
Ultrawide QHD	3440 × 1440	21:9
MacBook Retina	2560 × 1600	16:10
Typical flagship phone	1179 × 2556	~19.5:9
Typical Android (FHD+)	1080 × 2400	20:9

FAQ

Frequently asked questions

What is screen resolution?

Screen resolution is the number of pixels a display shows horizontally and vertically, written as width × height, such as 1920 × 1080. A higher resolution packs more pixels into the same physical screen, which usually means sharper detail.

How do I find my screen resolution?

Open this page on the device you want to check — your screen resolution, browser window size, and aspect ratio appear automatically at the top, with nothing to install.

What's the difference between screen resolution and browser window size?

Screen resolution is fixed by your display hardware. Browser window size is how large the browser itself is on screen, which shrinks if the window isn't maximized — that's why the two numbers on this page can differ.

How can I check my phone's screen resolution in pixels?

The easiest way is to open this page directly on your phone's browser — it reads the resolution automatically. Your phone's settings menu usually shows the model name, but not the pixel count.

What does aspect ratio mean?

Aspect ratio is the proportion between width and height, shown as a simplified pair like 16:9. A 1920 × 1080 screen and a 3840 × 2160 screen both simplify to 16:9, even though one has four times more pixels.