How to use the screen resolution checker
- Open this page on the device you want to check. The results panel fills in on its own.
- Read the large number at the top. It is the estimated physical resolution of the screen.
- Compare the scaled resolution and pixel ratio below it to understand how your system scales the interface.
- Resize the browser window or rotate your device to watch the window size update live.
- Press Copy results to paste all the values into a support ticket, a listing or a message.
Why are there three different sizes?
A modern screen reports several numbers, and each answers a different question.
- Physical resolution: the real count of pixels on the panel. This is the one printed in a monitor or phone specification.
- Scaled resolution: the size your system pretends the screen is, so text and buttons stay readable. Web pages are laid out in these CSS pixels.
- Browser window: only the part of the screen your page can use right now. It shrinks with toolbars, sidebars and split-screen layouts.
The link between the first two is the pixel ratio. Here is how common scaling settings change what a browser reports:
| Physical resolution | System scaling | Scaled resolution |
|---|---|---|
| 3840 × 2160 | 150% | 2560 × 1440 |
| 3840 × 2160 | 200% | 1920 × 1080 |
| 2560 × 1440 | 125% | 2048 × 1152 |
| 2880 × 1800 | 200% | 1440 × 900 |
Common screen resolutions compared
Pixel totals below are calculated from width × height. The last column shows how many times more pixels each has than Full HD.
| Name | Resolution | Total pixels | Aspect ratio | vs Full HD |
|---|---|---|---|---|
| HD 720p | 1280 × 720 | 921,600 | 16:9 | 0.44× |
| WXGA laptop | 1366 × 768 | 1,049,088 | 16:9 (approx.) | 0.51× |
| HD+ | 1600 × 900 | 1,440,000 | 16:9 | 0.69× |
| Full HD 1080p | 1920 × 1080 | 2,073,600 | 16:9 | 1.00× |
| WUXGA | 1920 × 1200 | 2,304,000 | 16:10 | 1.11× |
| QHD 1440p | 2560 × 1440 | 3,686,400 | 16:9 | 1.78× |
| WQXGA | 2560 × 1600 | 4,096,000 | 16:10 | 1.98× |
| Ultrawide QHD | 3440 × 1440 | 4,953,600 | 21:9 (43:18) | 2.39× |
| 4K UHD | 3840 × 2160 | 8,294,400 | 16:9 | 4.00× |
| 5K | 5120 × 2880 | 14,745,600 | 16:9 | 7.11× |
How to check your resolution without a tool
- Windows: open Settings, choose System, then Display, and look at Display resolution. The entry marked Recommended is the panel's native setting.
- Mac: open System Settings, choose Displays, and check the resolution shown for your display. Many Macs show a scaled option rather than the physical figure.
- iPhone and Android: settings rarely list a resolution, so this page is usually the quickest route. Open it in the phone's browser.
Who this is for
- Web designers and developersConfirm the viewport width a real device reports before you test breakpoints and media queries.
- Buyers of used monitors and phonesCheck that a listing claiming 4K or QHD really outputs that many pixels.
- GamersMake sure a game or console is running at the resolution you selected, not a scaled-down fallback.
- Streamers and video editorsMatch a canvas, capture size or export setting to the screen you actually use.
- Support and IT teamsAsk a customer to copy their results, so you get exact numbers instead of a guess.
- Anyone with blurry textSpot a display running below its native resolution, a common cause of a soft picture.
Frequently asked questions
What is my screen resolution right now?
It is the large number at the top of the results panel, written as width × height in pixels. It shows the resolution your operating system is currently sending to the display, so it matches the panel's native resolution only when your system is set to its recommended setting.
Why does the checker show a smaller number than the one printed on my monitor's box?
Display scaling. A 3840 × 2160 monitor set to 150% scaling tells the browser it is 2560 × 1440, because interface elements are drawn larger. This tool multiplies the reported size by your pixel ratio to estimate the real pixel count, and it also lists the scaled figure separately.
Are 1920 × 1080, Full HD and 1080p the same thing?
Yes. All three describe a screen 1,920 pixels wide and 1,080 pixels tall, which is 2,073,600 pixels in total. The name 1080p refers only to the 1,080 rows of pixels, and the p stands for progressive scan.
What is the difference between screen resolution and browser window size?
Screen resolution is the size of the whole display. The browser window size, also called the viewport, is only the area available to a web page, and it changes whenever you resize the window, open a sidebar or rotate a phone.
Does browser zoom change the result?
Zoom changes the scaled numbers and the pixel ratio, but the physical estimate should usually stay the same because both figures move together. It can drift by a pixel or two from rounding. Press Ctrl and 0 on Windows, or Command and 0 on a Mac, to reset zoom before you rely on the numbers.
Why do phones show such small numbers?
Phones report a scaled size measured in CSS pixels, for example 390 × 844, and pack several physical pixels into each one. A pixel ratio of 3 means the physical resolution is three times larger in each direction. The physical estimate line already does that multiplication for you.
Can this tell me if my monitor is running below its native resolution?
It can help. Compare the physical estimate with the resolution in your monitor's specification sheet. If yours is lower, choose the option marked recommended in your operating system's display settings, since a non-native resolution is a common cause of soft, blurry text.
Is any of my screen information sent to a server?
No. Your browser reads these values locally and this page prints them on your screen. They are not uploaded, stored or shared, and the Copy button only places text on your own clipboard.