Quad High Definition (QHD) means a resolution of 2560 × 1440 pixels, also called 1440p. It has about 3.69 million pixels, which is four times the pixel count of standard 720p HD. QHD is not the same as consumer 4K, which is 3840 × 2160.
The dimensions behind QHD
QHD is usually defined as 2560 × 1440 pixels. Android’s developer documentation for the CameraX Quality API describes QHD video as “1440p” and states that this quality usually corresponds to a resolution of 2560 × 1440 pixels. The same documentation separates QHD from UHD, which it associates with 2160p, usually 3840 × 2160.
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Multiplying the two dimensions gives 2560 × 1440 = 3,686,400 total pixels, or about 3.69 megapixels. A 2013-era California Energy Commission document reports the same rounded figure of 3.69 MP for QHD at 2560 × 1440.
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The word “quad” refers to the total number of pixels, not to a doubling of one dimension alone. The standard HD reference is 1280 × 720, which has 921,600 pixels. QHD doubles both the width and the height, so the total pixel count is multiplied by four:
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- 1280 × 720 = 921,600 pixels (720p HD)
- 2560 × 1440 = 3,686,400 pixels (QHD, 1440p)
- 3,686,400 ÷ 921,600 = 4
HP’s consumer explainer describes this same relationship between QHD and HD. A useful way to picture it is a grid: each side of the screen has twice as many pixels, so the grid has four times as many cells.
QHD compared with other common resolutions
| Term | Common dimensions | Pixels (total) | Notes |
|---|---|---|---|
| HD (720p) | 1280 × 720 | 921,600 | Reference point for the “quad” comparison. |
| Full HD (1080p) | 1920 × 1080 | 2,073,600 | Lower resolution than QHD, per the California Energy Commission material. |
| QHD / 1440p | 2560 × 1440 | 3,686,400 | About 3.69 million pixels; the subject of this article. |
| UHD / consumer 4K | 3840 × 2160 | 8,294,400 | Android documentation distinguishes this from QHD. |
| “2K” (consumer usage) | Not precise | Not stated | Often used loosely for QHD; cinematic 2K is 2048 × 1080 according to LG. |
The 3,686,400 figure for QHD is the multiplication of 2560 by 1440. Samsung Business Insights (2026) presents the same comparison in its guide to monitor resolutions at https://insights.samsung.com/2026/06/16/qhd-vs-fhd-vs-4k-which-monitor-resolution-is-right-for-your-business/.
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QHD is not 4K
QHD is sometimes confused with 4K because both sit above Full HD. They are different standards. Consumer 4K (UHD) is 3840 × 2160, which has more than twice the pixels of QHD. Describing a 1440p screen as 4K is inaccurate and will mislead buyers who compare specifications.
The “2K” label and why it causes confusion
Retailers and some manufacturers call QHD “2K” because the horizontal pixel count is roughly 2,500. That usage is loose. LG notes that QHD is often called 2K, while cinematic 2K is 2048 × 1080, a different format. When precision matters, use “QHD” or “1440p.”
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- DisplayWidget Center enables easy OSD access and monitor settings adjustments with a mouse.
- USB Type-C hub supports video transmission in DisplayPort signal; can serve as a USB hub, meaning that you can connect your device to your wired peripherals with clutter-free set-up
Whether a device can drive QHD
Being able to display 2560 × 1440 depends on the specific device. Support for a particular resolution, refresh rate, and color depth varies by product. Intel recommends checking the display documentation or asking the manufacturer which modes are supported. A monitor’s listing, a laptop’s specification sheet, or the graphics driver’s display settings are the places to confirm this before buying or configuring a system. A QHD monitor is normally described as a 2560 × 1440 display, but the refresh rate it supports at that resolution should be verified against the exact model.
How the term is used in searches
Readers search for the term in several forms, including “What does Quad HD really mean?”, “What is a QHD monitor?”, “Is QHD the same as 1440p or 2K?”, and questions about whether specific graphics chips support QHD. In headings and product text, “QHD,” “Quad High Definition,” and “1440p” all refer to the same resolution, while “2K” should be avoided unless the surrounding text explains the loose usage.
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- Package Contents: DisplayPort cable, L-shaped Screwdriver, Power cord, Power adapter, Quick start guide, Warranty Card
Origin of the term
The name’s first use and its original coiner are not established by the sources available for this article, so no individual or organization can be credited with it.
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