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Laptop screen PPI calculator: how sharp is that screen?

Enter a laptop’s screen size and resolution to get its pixels per inch and how sharp it looks from where you sit.

Screen sharpness calculator

Pixels per inch · size · scaling

Use the screen size and resolution from the spec sheet. Size is the diagonal, in inches. Picking a MacBook fills in both.

Screen A

Only a nickname like QHD+ or 2.8K? Those cover more than one pixel count. Check the maker’s spec page for the exact numbers.

Where to find the screen size and resolution

Both numbers are on the spec sheet, usually in one line, something like "14" WUXGA (1920x1200)". The size is the diagonal in inches. The resolution is the pixel count across, then down.

Store listings often swap the numbers for nicknames. FHD or 1080p is 1920 × 1080, and WUXGA, FHD+ or 1200p is 1920 × 1200. QHD is 2560 × 1440. 2.5K or WQXGA is 2560 × 1600.

Some nicknames cover more than one panel. 2.8K is 2880 × 1800 on 16:10 screens and 2880 × 1620 on 16:9 ones, so check the pixel count. QHD+ is just as loose: Dell's own QHD+ page says it's "typically around 3200 x 1800" but lists 2.5K (2560 × 1600) models under it. "3K" can mean 2880 × 1920 or 3072 × 1920. "4K" is 3840 × 2160 on a 16:9 screen and usually 3840 × 2400 on a 16:10 one. If a listing only gives a nickname, check the maker's spec page before you trust it.

On a laptop you already own, Windows shows the resolution in Settings › System › Display. On a Mac, Apple's tech specs page for your model lists the size and native resolution. Pick a MacBook in the calculator and it fills in both numbers from Apple's specs.

What the result means

Pixels per inch is plain math: the number of pixels along the diagonal divided by the diagonal in inches. A 15.6-inch 1080p screen works out to 141 PPI, and a 13.6-inch MacBook Air is 224. More pixels in the same space means smaller pixels, so text edges look smoother.

Whether you can see those pixels depends on how far away you sit. Normal 20/20 vision resolves detail about 1 minute of arc wide (AAO EyeWiki). From that, the calculator works out the distance beyond which a 20/20 eye can't pick out single pixels. For a 141 PPI screen that's about 24 inches. For a 224 PPI screen it's about 15 inches.

The sharpness word is our rule of thumb, not a standard. We assume you sit about 20 inches from a laptop screen, which is the near end of the 20 to 40 inches OSHA gives for monitors. If pixels blend before 16 inches, we call the screen very sharp. Up to 20 inches is sharp, up to 28 is fine, and beyond that we call it grainy. Sit farther back and every screen looks sharper than its label.

The maths assumes 20/20 vision. If your eyesight is weaker, you resolve less detail, so pixels blend sooner. At 20/40 the smallest detail you can see is about 2 minutes of arc (Webvision), which halves the blend distance. A screen will look at least as sharp to you as its label says. What you may want is bigger text, and that's a scaling setting, covered below.

Common laptop screens compared

Higher resolution only matters relative to size. A 16-inch 1920 × 1200 panel has fewer pixels per inch than a 14-inch one with the same resolution, so it looks a little softer.

ScreenResolutionPixels per inchPixels blend beyond
15.6" HD1366 × 76810034 in
15.6" Full HD1920 × 108014124 in
16" WUXGA1920 × 120014224 in
14" WUXGA1920 × 120016221 in
16" 2.5K2560 × 160018918 in
15.6" 2.8K (16:9)2880 × 162021216 in
MacBook Neo 13"2408 × 150621916 in
MacBook Air 13.6"2560 × 166422415 in
14" 2.8K (16:10)2880 × 180024314 in
MacBook Pro 14.2"3024 × 196425413.5 in
16" 4K-class3840 × 240028312 in

PPI is computed from size and resolution. MacBook sizes, resolutions and ppi are Apple's tech specs figures (Apple, checked Oct 24, 2026). Blend distance assumes 20/20 vision resolves 1 arcminute (AAO EyeWiki, checked Oct 24, 2026).

1080p vs 1200p vs higher resolution

1200p beats 1080p on height, not sharpness. On the same 14-inch or 16-inch diagonal, 1920 × 1200 is 16:10, so the screen is taller and has 120 more rows of pixels, about 11% more of a document at the same scale. Pixel density barely changes.

The jump you can see is from about 140 to 160 PPI up to 200 and above. At that point a 20/20 eye can't make out pixels at a normal distance, and small text looks like print. That's where 2.5K, 2.8K and MacBook screens sit. Going from 250 to 280 PPI is much harder to notice.

OLED is a panel type, not a resolution. An OLED laptop can be 1920 × 1200 or 2880 × 1800, so compare the pixel counts, not the label.

Windows scaling and why text looks small

A sharper screen doesn't mean smaller text. Microsoft says Windows sets higher scale factors on high-DPI screens so everything stays at a usable size, and Apple says a Mac uses the best resolution for its display by default. Letters stay about the same size; they're just drawn with more pixels.

Microsoft's Windows 8.1 table for common panels lists 125% for a 15.4-inch 1920 × 1080 screen, 150% for a 13.3-inch 1920 × 1200 screen and 200% for a 13.3-inch 2560 × 1440 screen. When your screen is in that table, the calculator shows the matching figure as the Windows 8.1 default. Windows 11 may pick a different step, so treat it as a guide.

For anything else, use what Windows marks "(Recommended)" under Settings › System › Display › Scale. Microsoft says that's usually the best choice. Scaling changes how big things look, not how sharp they are, so a 200% scaled 2.8K screen still has all its pixels drawing each letter.

Two common mistakes: setting a 2.8K laptop to 1920 × 1080 to make text bigger, which makes it blurry, and judging a screen by resolution alone without the size. Change the scale, not the resolution. If you're still choosing a laptop, the laptop finder filters by screen, and our buying guides list the resolution for every pick.

Questions people ask

Is 141 PPI good for a laptop?

It's fine for everyday work. A 15.6-inch 1080p screen has 141 PPI, and at about 20 inches a sharp-eyed reader can just make out the pixel grid on small text. Most people don't mind. If you read or edit text all day, a screen above about 200 PPI looks noticeably crisper.

What PPI is a MacBook Air?

Apple lists 224 pixels per inch for both the 13.6-inch (2560 × 1664) and 15.3-inch (2880 × 1864) MacBook Air. The 14-inch and 16-inch MacBook Pro are 254 PPI.

Is 1920 x 1200 better than 1920 x 1080?

For work, usually yes. It has the same width but 120 more rows of pixels, so you see more of a page or spreadsheet without scrolling. Sharpness is almost identical on the same size screen.

Can my eyes see the difference between 220 and 280 PPI?

At a normal laptop distance, most people can't. A 20/20 eye stops resolving pixels beyond about 15 inches at 220 PPI and about 12 inches at 280 PPI, and you probably sit farther back than both.

Why does the calculator show 225 but Apple says 224?

It doesn't for MacBooks: when you pick one, it shows Apple's figure and the exact math next to it. Typing a custom 13.6-inch 2560 × 1664 screen gives 224.5, which rounds to 225; Apple rounds down to 224. Apple's diagonal is also measured as a full rectangle, and the rounded corners make the viewable area a bit smaller.

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