What Is My Screen Resolution?

Your display, measured instantly — resolution, viewport, pixel ratio and more.

SCREEN RESOLUTION
—
VIEWPORT
—
DEVICE PIXEL RATIO
—
PHYSICAL PIXELS (EST.)
—
COLOR DEPTH
—

Resize the window or drag it to another monitor — values update live.

Common screen resolutions

  • 1920×1080 (Full HD) — the most common desktop resolution worldwide.
  • 2560×1440 (QHD) — the gaming sweet spot.
  • 3840×2160 (4K UHD) — high-end monitors and TVs.
  • 1366×768 — older/budget laptops, still surprisingly common.
  • 390×844-ish — modern phones in CSS pixels (with a DPR of ~3, that's over 1170 physical pixels wide).

Why check your resolution?

Typical reasons: confirming a new monitor is actually running at its native resolution (a surprisingly common miss — check your display settings if the number looks low), gathering details for a support ticket, testing how a website behaves at a given viewport, or verifying what display scaling is doing. If you just set up a new screen, run our dead pixel test while the return window is open, and designers sizing content for a display can jump to the aspect ratio calculator.

Frequently Asked Questions

What is my screen resolution?

It is shown live at the top of this page — the number of physical pixels your display is currently using, detected automatically by your browser. If you resize the window or move it to another monitor, the values update.

What is the difference between screen resolution and viewport size?

Screen resolution is the full display (e.g. 1920×1080). Viewport is just the part your browser window currently occupies — always the same or smaller. Web designers care about the viewport; monitor shoppers care about the resolution.

What is device pixel ratio (DPR)?

On high-density displays (like Retina screens and most phones), the system draws interface elements using multiple physical pixels per "CSS pixel." A DPR of 2 means a 400-pixel-wide element is rendered with 800 physical pixels — that is why text looks sharper on those screens.

Why does my resolution show smaller than my monitor’s spec?

Two common reasons: your operating system display scaling (e.g. 125% or 150% on Windows) makes the browser report scaled CSS pixels, or the monitor is genuinely set below its native resolution in display settings. Check the device pixel ratio reading — scaling shows up there.