What Is My Screen Resolution?

About the Screen Resolution

Find your screen resolution in physical pixels, the size of your browser window, your display scaling (device pixel ratio), aspect ratio, color depth, HDR support and refresh rate.

Key features

Screen resolution in physical pixels
Browser window (viewport) size
Device pixel ratio and display scaling
Aspect ratio
Color depth, color gamut and HDR
Refresh rate, orientation and touch support

Your screen's resolution, browser window size and display details are shown above, and update live as you resize the window. Share them with support teams, web developers or game settings menus.

Common screen resolutions

Resolution	Name	Aspect ratio
1366 × 768	HD	16:9 (approx.)
1920 × 1080	Full HD (1080p)	16:9
2560 × 1440	QHD (1440p)	16:9
2560 × 1600	WQXGA	16:10
3440 × 1440	UltraWide QHD	21:9
3840 × 2160	4K UHD	16:9

Display scaling explained

Physical resolution	Scaling	Seen by websites
1920 × 1080	100%	1920 × 1080
1920 × 1080	125%	1536 × 864
2560 × 1600	200% (Retina)	1280 × 800
3840 × 2160	150%	2560 × 1440

Refresh rate test, dead pixel test, and user agent parser.

How to use the Screen Resolution

Open the test. It's ready immediately, with nothing to install.
Follow the on-screen prompt: click, type, press or watch as instructed.
Read your results, which update live as you test.
Repeat as often as you like. Results stay in your browser.

Frequently asked questions

Why is my screen resolution shown smaller than my monitor's?

Operating systems scale the display so text isn't tiny. A 1920 × 1080 screen at 125% scaling appears to websites as 1536 × 864 CSS pixels. Multiplying by the device pixel ratio (1.25) gives the real resolution, which this tool shows as physical pixels.

What is device pixel ratio?

The number of physical screen pixels per CSS pixel. 1 means no scaling, 2 is common on Retina and high-DPI laptops and phones, and values like 1.25 or 1.5 come from Windows display scaling. Browser zoom changes it too.

What's the difference between screen size and viewport?

The screen is your whole display. The viewport is the part of the browser window that shows the web page, without toolbars, tabs and scrollbars. Web designers use viewport sizes for responsive layouts.

Is my information sent anywhere?

No. Everything is read and shown in your browser.

Are my camera and microphone recorded?

No. Audio and video are processed live in your browser and never uploaded. The only recording is the optional 5-second mic playback, which stays on your device and disappears when you leave the page.

Why does my browser ask for permission?

Browsers require your permission before any site can use your camera or microphone. You can revoke it at any time from the icon in the address bar.

Do these tests work on phones?

Most do: mic, webcam, speaker, screen, reaction time and click tests work on phones and tablets. The keyboard, mouse and gamepad testers need those devices connected.

What Is My Screen Resolution? – Screen Size & Pixel Ratio

About the Screen Resolution

Key features