What Is My Screen Size?
Your browser-reported screen size is
Try resizing this window — all values update live
Page area available in this window
… × …
These browser dimensions are not a measurement in inches and may differ from your display's native resolution.
How much bigger will the picture be?
Screen area and the size of a complete video picture can grow by different amounts. Choose your displays and see where the extra space goes.
Explore a video comparison →Choose from the tablet size chart →Start with the task you want to finish
Measure a display, compare alternatives, choose a setup or inspect a browser layout.
Check & Measure
Read your browser dimensions or measure the physical display.
Compare Screens
Choose displays and compare their size, video picture and document area.
Choose a Display
Consider viewing distance, resolution, workspace and the space on your desk.
For Developers
Inspect viewports, breakpoints, image density and responsive layouts.
Browse sourced screen specifications
Open the device directory when you need a known model rather than the values reported by this browser. It separates physical panel specifications from CSS viewport and scaled-workspace references.
Open device screen sizes →About this screen size checker
The live checker reports browser screen and page dimensions. Use the measurement guide for physical inches, the comparison tool to understand size differences, and the expandable developer report for layout debugging.
- Resolution
- The display's full pixel grid. Describes the hardware itself — not what your CSS actually sees.
- Viewport
- The area the page renders into. Media queries and breakpoints respond to this, not the full screen.
- Device pixel ratio
- The browser rendering ratio for each CSS pixel. It affects image sampling and can change with zoom and display settings.
- Physical size
- The real diagonal in inches. Sets true-size rendering and pixel density (PPI).
Anonymous aggregate stats are stored as monthly counts, not raw visit records.
Frequently asked questions
›What is my screen size?
Your screen size has two meanings: the physical size of your display measured diagonally in inches, and the screen environment your browser reports in pixels. This page gives the complete overview; for a resolution-only view, use the screen resolution checker.
›What is the difference between screen resolution and viewport size?
Native resolution counts the physical panel pixels. The screen value above is what the browser reports in CSS pixels. The viewport is the page-rendering area inside the window; CSS media queries respond to that area. For layout debugging, open the viewport size checker.
›Why does my screen show fewer pixels than advertised?
Operating-system scaling and browser zoom can change the reported CSS dimensions without changing the physical panel. Multiplying by DPR gives a rendering estimate, not a guarantee of native resolution. For image sizing, use the device pixel ratio checker.
›Is any of this data sent to your servers?
The live detection runs in your browser. We count anonymous aggregate screen-environment buckets to power comparison stats, but we do not store raw visits, IP addresses, user IDs, full user-agent strings, copied reports or shared report links.