How to Find Your Phone's Screen Size, Resolution, and PPI

To find your phone screen specs, you need three numbers: diagonal size in inches, resolution in pixels, and PPI (pixel density). On most phones these live in the Settings app, on the manufacturer's product page, or in a third-party device database — and the right place to look depends on what you actually want to do with the numbers. This guide covers the three reliable methods, in order of how fast they get you the answer, plus the per-platform menu paths for iPhone, Android, and iPad.

The fastest method: a device specs database

If you only need to look something up — for buying a phone case, calibrating an online tool, or comparing two devices — a third-party database is faster than digging through Settings. The Screen Ruler device specs database lists 69 phones and tablets with their diagonal, resolution, PPI, panel type, and a one-tap link to a calibrated ruler for each device. Search by brand, OS, or release year and the full spec sheet shows up in seconds.

When this approach works:

• You want to find specs for a phone you do not own (gift research, comparison, app QA).
• You need the values formatted in a single place (e.g. for a spreadsheet).
• You need ruler-calibration constants alongside the screen specs.

When it does not:

• You need a feature that is not in the database (e.g. exact battery capacity, modem chip).
• The phone is brand-new and the database has not picked it up yet.

Method 1: iPhone — Settings + Apple specs page

iPhone does not expose the full screen specs in Settings — Apple keeps the marketing-friendly numbers on its product pages instead. The fastest path:

1. Open Settings → General → About. This shows your iPhone model name (e.g. "iPhone 15 Pro") and total storage. The model name is what you need for the next step.
2. Visit Apple's support page support.apple.com/iphone and search for your model. Each iPhone has a dedicated specs page with the diagonal size, resolution, and PPI listed under "Display."

Alternatively, the Settings → General → Legal & Regulatory screen on iOS 17+ shows the model number (e.g. "MTUW3LL/A"), which Apple support pages can also map back to specs.

Some quick references for current iPhones:

• iPhone 15: 6.1-inch Super Retina XDR, 2556 × 1179, 460 PPI
• iPhone 15 Plus: 6.7-inch, 2796 × 1290, 460 PPI
• iPhone 15 Pro: 6.1-inch ProMotion, 2556 × 1179, 460 PPI
• iPhone 15 Pro Max: 6.7-inch ProMotion, 2796 × 1290, 460 PPI
• iPhone 14: 6.1-inch, 2532 × 1170, 460 PPI

For older models, the device specs database is faster than walking through the Apple support tree.

Method 2: Android — Settings + Build info

Android exposes more in Settings than iOS, but the path is not standardized across manufacturers. The general approach:

1. Settings → About phone shows the model name and Android version.
2. Settings → About phone → Software information typically shows the build number and sometimes the screen resolution.
3. Settings → Display sometimes shows the resolution (e.g. on Samsung Galaxy phones you can see "FHD+ 2400 × 1080" listed).
4. For PPI, you usually need to search for your model on the manufacturer's site or on a database like GSMArena or the Screen Ruler device specs database.

The Samsung Galaxy line, OnePlus, Google Pixel, and Xiaomi each have slightly different paths:

• Samsung Galaxy: Settings → Display → Screen resolution shows FHD+/QHD+ toggle and exact pixel count.
• OnePlus: Settings → Display & Brightness → Resolution.
• Google Pixel: Settings → Display — Pixel does not show resolution in Settings; check google.com/pixel for the full specs.
• Xiaomi (HyperOS/MIUI): Settings → Display → Resolution — newer models expose the toggle, older ones hide it.

For PPI specifically, no Android phone exposes it in Settings. You need to compute it (resolution diagonal divided by physical diagonal) or look it up.

Method 3: iPad — Settings + Apple specs

iPads follow the iPhone pattern: Settings shows the model name, and the rest comes from Apple's product page.

1. Settings → General → About — model name, storage.
2. Visit support.apple.com/ipad and search.

Quick reference:

• iPad 10th gen: 10.9-inch, 2360 × 1640, 264 PPI
• iPad mini 6: 8.3-inch, 2266 × 1488, 326 PPI
• iPad Air 5: 10.9-inch, 2360 × 1640, 264 PPI
• iPad Pro 11-inch (M2): 11-inch, 2388 × 1668, 264 PPI
• iPad Pro 12.9-inch (M2): 12.9-inch Liquid Retina XDR, 2732 × 2048, 264 PPI

Note that all current iPads share 264 PPI except the iPad mini at 326 PPI — Apple holds PPI roughly constant across screen sizes, scaling resolution to match.

Method 4: third-party utilities

If you need details that the OS does not expose — actual physical dimensions in millimeters, color gamut percentage, refresh rate verification — third-party utilities are the answer. The most reliable:

• DisplayMate (paid lab reports) — independent measurements that often reveal manufacturer claims to be slightly inflated.
• GSMArena (free database) — comprehensive but mixed accuracy depending on the source.
• DXOMARK (free, focused on cameras and screens) — credible for the metrics they cover.
• The Screen Ruler device specs database — focused specifically on screen specs relevant to ruler calibration, with searchable filters.

For developer-grade detail (e.g. HDR support tier, exact panel response time), the manufacturer's developer page or the panel maker's data sheet (Samsung Display, BOE, LG Display) is the only authoritative source.

How to verify a manufacturer's claim

If a manufacturer's listed PPI looks wrong, verify with the formula:

PPI = √(width² + height²) / diagonal_inches

For a 6.1-inch panel at 2556 × 1179:

• Diagonal pixels = √(2556² + 1179²) = √(6,533,136 + 1,390,041) = √7,923,177 ≈ 2,815
• PPI = 2,815 / 6.1 ≈ 461

The manufacturer says 460 PPI, which rounds correctly. If the formula gives you a number more than 5 PPI off the listed value, the manufacturer is rounding aggressively or measuring the diagonal differently. The side-by-side comparison guide walks through more verification examples.

Common questions

Why does my phone's display setting show a lower resolution than the spec sheet?

Many phones ship with a default "FHD+" setting and a "QHD+" toggle to save battery. The spec sheet quotes the maximum resolution; Settings shows the current resolution. Toggle in Settings → Display to enable the full panel resolution.

Where does the operating system get the resolution from?

The OS reads it from the panel's EDID (Extended Display Identification Data) on connection. Mobile devices have this baked in at manufacture. On a desktop with an external display, the OS asks the connected monitor over HDMI/DisplayPort.

What is the difference between screen resolution and screen size?

Resolution is the pixel grid (e.g. 2556 × 1179). Size is the physical diagonal in inches. PPI is what links them — same resolution at a smaller size means higher PPI. The pillar guide on phone screen specs explains the relationship in more depth.

Why does my browser report a different resolution than my phone's spec sheet?

Browsers report CSS pixels, not physical pixels. A Retina iPhone with a 2556 × 1179 panel reports screen.width = 393 and screen.height = 852 because devicePixelRatio = 3. Multiply by devicePixelRatio to get physical pixels.

How do I find specs for a phone I have not bought yet?

The Screen Ruler device specs database covers most phones from 2018 onwards across Apple, Samsung, Google, OnePlus, Xiaomi, OPPO, Vivo, and Realme. Filter by brand or release year, and the full spec sheet is one tap away.

Summary

The fastest way to find your phone screen specs depends on what you need:

• Quick lookup, any device → Screen Ruler device specs database.
• Your own iPhone or iPad → Settings → About + Apple's support page.
• Your own Android → Settings → About + manufacturer's product page (resolution sometimes in Settings → Display).
• Lab-verified accuracy → DisplayMate or DXOMARK reports.

For the broader context — what each spec means and which ones to trust — start with the complete guide to phone screen specs.

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This article supports the Screen Ruler device-specs tool.