Open dataset · CC BY 4.0

Apple Watch SE (3rd generation) 40mm screen size

Apple Watch SE (3rd generation) 40mm: 162 × 197 points at @2x, which is 324 × 394 pixels at 326 ppi on an OLED display (40 mm case).

Screen specs

Apple Watch SE (3rd generation) 40mm screen specs
Points	162 × 197 pt
Pixels	324 × 394 px
Scale	@2x
PPI (Apple)	326
Case size	40 mm
Aspect ratio	162:197 (1.216)
Display type	OLED
ProMotion	No
Always-On	Yes
Cutout	None
Home button	No
Release year	2025

Safe area insets

Safe areas haven't been measured for this device yet.

Corner radius (unofficial)

28 pt (unofficial). Apple doesn't publish this; measured from the Simulator's private display corner radius.

UNOFFICIAL: DeviceCornerRadius key in the Simulator device type (source: Xcode 27.1 Simulator device type 'Apple Watch SE 3 (40mm)', Apple Watch SE 3 (40mm).simdevicetype capabilities.plist (static, not booted)); on the booted iOS 27 device types this key matched the private UIScreen _displayCornerRadius to within 0.34 pt (it differs only for the iPhone 12 family: 47/53 vs 47.33/53.33). Apple does not publish this value

For iOS developers

A 1 pt line is 2 pixels thick.
A 44 pt tap target is 88 × 88 pixels.
Assets: @2x.
WKInterfaceDevice.current().screenBounds: 162 × 197 points (portrait).

Same layout size

Same points and scale (162 × 197 pt at @2x):

Compare

Apple Watch SE (3rd generation) 40mm vs Apple Watch SE (2nd generation) 40mm
Previous Apple Watch SE model: Apple Watch SE (2nd generation) 40mm

Sources

Apple Watch SE 3 - Tech Specs, Apple: diagonal, resolution, ppi, display_type, refresh_rate, features
Xcode 27.1 (27A9275) Simulator: UIKit probe app (scripts/simulator/Measure.swift) and device-type capabilities.plist, measured 2026-10-27, Apple: corner_radius (unofficial), logical_resolution, scale

Download and cite

/api/devices/apple-watch-se-3rd-generation-40mm.json: this device as JSON.
/api/devices.json: every device.
/api/devices.csv: every device as CSV.
github.com/aryansbtloe/apple-device-screen-specs: the dataset, JSON Schema and validator.

Data: Apple device screen specs by bestlatestapps.com (https://bestlatestapps.com/tools/apple-device-screen-sizes/), licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Built from Apple's published tech specs and Human Interface Guidelines, Wikipedia for model identifiers, and our own Xcode Simulator measurements.

Cite as: Singh, A. (2026). Apple Device Screen Specs (v0.1.0). Zenodo. https://doi.org/10.5281/zenodo.23819103

Also on: Zenodo and Kaggle

Link to this tool

Found it useful? You're welcome to link to it from your README, docs or blog.

HTML

<a href="https://bestlatestapps.com/tools/apple-device-screen-sizes/apple-watch-se-3rd-generation-40mm/">Apple Watch SE (3rd generation) 40mm screen size</a> – Apple Watch SE (3rd generation) 40mm: OLED screen, 162×197 points at @2x, 324×394 px, 326 ppi.

Markdown

[Apple Watch SE (3rd generation) 40mm screen size](https://bestlatestapps.com/tools/apple-device-screen-sizes/apple-watch-se-3rd-generation-40mm/) – Apple Watch SE (3rd generation) 40mm: OLED screen, 162×197 points at @2x, 324×394 px, 326 ppi.

Dataset credit (CC BY 4.0)

Data: [Apple device screen specs](https://bestlatestapps.com/tools/apple-device-screen-sizes/) by bestlatestapps.com, CC BY 4.0

Questions

What is the Apple Watch SE (3rd generation) 40mm screen resolution?

324 × 394 pixels at 326 ppi, shown as 162 × 197 points at @2x.

Does the Apple Watch SE (3rd generation) 40mm have the same screen size as the Apple Watch SE (2nd generation) 40mm?

Yes, for layout: both are 162 × 197 points at @2x, so apps and web pages lay out the same. Both have 324 × 394 pixels.

Data version 0.1.0, generated 2026-10-27.