Screen Size Finder
Live details about your screen, viewport and browser display settings — read directly from your device, updated as you resize.
Viewport (browser window)
— px
Viewport width
— px
Viewport height
Resize your browser window and watch these numbers update live.
Display details
| Screen resolution | — |
| Available screen (minus taskbar) | — |
| Device pixels for viewport | — |
| Device pixel ratio | — |
| Color depth | — |
| Screen orientation | — |
| Bootstrap breakpoint | — |
| Touch points | — |
Browser identity
Copied to clipboard.
On-screen ruler
CSS defines 96 px = 1 inch, so this ruler is drawn at exactly that scale. On most screens it is only approximate, because monitors vary in physical pixel size.
1 inch (96 px)
≈ 2.54 cm (same length)
3 cm scale (≈ 28.346 px per cm)
How to use
- Open this page on the device you want to measure.
- Read the live viewport size at the top — it updates as you resize or rotate.
- Use the display table for screen resolution, pixel ratio, color depth and breakpoint.
- Compare the on-screen ruler against a physical ruler if you need a rough scale check.
CSS pixel vs device pixel: your browser lays pages out in CSS pixels. Device pixels are the real hardware dots — multiply CSS pixels by the device pixel ratio to get device pixels.