What Is My Screen Resolution

Retina Display Detector

Check if your screen is Retina / HiDPI based on DPR and pixel density.
Display Type
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Device Pixel Ratio: —
Viewport (CSS)
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Viewport (physical)
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Screen pixels
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Density class
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Touch Support
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A display is considered Retina / HiDPI if the device pixel ratio (DPR) is higher than 1. Modern devices use DPR values like 2, 2.5, 3, or even higher.

What Is a Retina Display?

A Retina display is a high-density screen designed by Apple where the pixels per inch (PPI) are so high that individual pixels are nearly invisible to the human eye at normal viewing distance. This creates sharper text, clearer images, smoother graphics, and an overall more detailed visual experience.

Retina technology is used in:

  • MacBooks (Retina, Liquid Retina, Retina XDR)
  • iPhones (Retina, Super Retina, Super Retina XDR)
  • iPads (Retina, Liquid Retina)
  • Apple Watch (Retina)

The key concept behind Retina is high pixel density, meaning more pixels are packed into a smaller space, producing extremely crisp visuals.

How Retina Detection Works

A Retina Display Detector typically checks:

  • Device Pixel Ratio (DPR) — Retina screens usually have a DPR of 2.0 or higher.
  • Screen Resolution — Determines how sharp the display is.
  • Viewport size vs. real pixels — Helps calculate pixel density.
  • High DPI settings — Used by Apple and some modern Windows devices.

If your device has a high pixel ratio (e.g., 2×, 3×), it is typically considered a Retina or high-density display.

Why Retina Displays Matter

Retina and high-density screens offer several advantages:

  • Sharper text that reduces eye strain
  • Higher-quality images and graphics
  • Smoother UI elements with less pixelation
  • Better experience for photo & video editing
  • More detail in games and 3D graphics

Web designers and developers use Retina detection to deliver higher-resolution images, icons, and UI elements for supported screens.

Why Use a Retina Display Detector?

Checking if your device has a Retina display helps you:

  • Verify if your screen is high-density (2× or 3×)
  • Choose the right graphics resolution for your device
  • Test website or app Retina compatibility
  • Optimize icons, images, and UI assets
  • Diagnose blurry or pixelated visuals

What makes a display “Retina”

“Retina” is Apple’s marketing term for a screen whose pixels are too small to be seen individually at a normal viewing distance. There’s no single magic number — it depends on how far you sit from the screen. A phone held 25–30 cm away needs a much higher pixel density to look “retina” than a laptop at 50 cm or a TV across the room. In browser terms, a display is usually considered high-density (retina-class) when its device pixel ratio is 2 or higher.

Retina thresholds by device type

Device typeTypical viewing distanceRetina-class pixel density
Smartphone25–30 cm~300+ PPI
Tablet35–40 cm~260+ PPI
Laptop50–60 cm~220+ PPI
Desktop monitor60–75 cm~180+ PPI
Television2–3 m~50–80 PPI (4K)

This is why a 4K TV can look razor-sharp at ~60 PPI while a phone needs 300+ PPI for the same effect — the farther away you are, the fewer pixels per inch your eye can resolve.

Frequently asked questions

Is my screen Retina?

If your device pixel ratio is 2 or higher, your display is retina-class — pixels are effectively invisible at normal viewing distance. The detector above reads your DPR and pixel density and tells you directly.

What PPI is considered Retina?

It varies by viewing distance: roughly 300+ PPI for phones, 260+ for tablets, 220+ for laptops, and 180+ for desktop monitors. There is no universal number because it depends on how close you sit.

Does Retina mean 4K?

No. “Retina” describes pixel density relative to viewing distance, not a specific resolution. A 4K TV isn’t retina if you sit close, and a lower-resolution phone can be retina because you hold it far from your eyes.

Is a Retina display worth it?

For text-heavy work, reading and design, yes — higher density means noticeably crisper text and images. For gaming or video at a distance, the benefit is smaller and comes at a higher GPU cost.

Why does my Retina screen report a lower resolution?

Retina screens report their CSS resolution, which is the physical resolution divided by the device pixel ratio. A 2880 × 1800 MacBook reports 1440 × 900 CSS pixels at DPR 2 — the same layout size, drawn with four times the pixels.