What Size Monitor Do You Need?
Monitor size is the diagonal measurement of a monitor’s viewable screen, stated in inches. For most people, a 24- to 27-inch monitor fits a standard desk and handles everyday work well, while 32-inch and ultrawide monitors suit multitasking, creative work, and immersive gaming.
The right size depends on how you’ll use the monitor, how far you sit from it, how much desk space you have, and its resolution. This page explains how monitor size is measured, how common sizes compare, and how to choose the right one. For an overview of how monitors work, see what a computer monitor is.
Monitor size essentials at a glance
Monitor size is measured diagonally across the viewable screen, not including the frame
Two monitors with the same diagonal size can have different widths and heights if their aspect ratios differ
24- and 27-inch monitors are the most common sizes for home and office desks
Larger monitors usually need higher resolution to keep text and images sharp
A larger screen generally calls for a slightly greater viewing distance
How Is Monitor Size Measured?
Monitor size is measured in a straight line from one corner of the viewable screen to the opposite corner. The measurement doesn’t include the bezel, frame, or stand, so the monitor’s overall dimensions are always slightly larger than its screen.
How to measure a monitor screen
Find the top-left corner of the visible display area, inside the bezel.
Measure diagonally to the bottom-right corner of the visible display area.
Round to the nearest common size. Many monitors are listed with a decimal size, such as 23.8 or 31.5 inches, and marketed as 24- or 32-inch models.
Why aspect ratio changes screen width and height
Diagonal size alone doesn’t tell you how wide or tall a screen is. Aspect ratio, the proportion of width to height, determines the shape. A 34-inch ultrawide monitor is much wider than a 27-inch monitor but about the same height. Learn more about aspect ratios and ultrawide monitors.
The table below shows approximate screen dimensions for common sizes. Dimensions are calculated from the diagonal and aspect ratio and exclude the bezel and stand.
Monitor size | Aspect ratio | Approx. screen width | Approx. screen height |
|---|---|---|---|
21.5 inches | 16:9 | 18.7 in. | 10.5 in. |
23.8 inches | 16:9 | 20.7 in. | 11.7 in. |
24 inches | 16:10 | 20.4 in. | 12.7 in. |
27 inches | 16:9 | 23.5 in. | 13.2 in. |
31.5 inches | 16:9 | 27.5 in. | 15.4 in. |
34 inches (ultrawide) | 21:9 | 31.3 in. | 13.4 in. |
49 inches (super ultrawide) | 32:9 | 47.2 in. | 13.3 in. |
For the full footprint, including the stand, check the product specifications before you buy.
Common Monitor Sizes and What They’re Best For
Most desktop monitors fall between 22 and 34 inches, and each size range suits different tasks and desk setups. The table below is a general guide; resolution and viewing distance also affect how a size feels in use.
Monitor size | Common resolutions | Best for | Things to know |
|---|---|---|---|
14 to 16 inches (portable) | Full HD and higher | A second screen for laptops while traveling | Often powered over a single USB-C cable |
21.5 to 22 inches | Full HD | Compact desks, reception areas, basic home use | Limited room for side-by-side windows |
23.8 to 24 inches | Full HD, WUXGA | Everyday work, schoolwork, competitive gaming, dual-monitor setups | Fits most desks and pairs well side by side |
27 inches | Full HD, QHD, 4K | Multitasking, home office, gaming, photo editing | QHD or higher keeps text sharp at this size |
31.5 to 32 inches | QHD, 4K | Creative work, large spreadsheets, entertainment | 4K is a common match; needs a deeper desk |
34 to 40 inches (ultrawide) | WQHD, 5K2K | Timelines, side-by-side apps, immersive games | Can replace a dual-monitor setup |
49 inches (super ultrawide) | DQHD | Wide multitasking workspaces and simulation games | Needs a wide desk; similar to two 27-inch screens side by side |
Is bigger always better?
A bigger monitor isn’t always better. On a shallow desk, a very large screen can force you to turn your head or eyes more than is comfortable. Some competitive gamers prefer 24- to 27-inch monitors so the whole screen stays in view without moving their eyes. See which monitor features matter for each use.
How Monitor Size and Resolution Work Together
Monitor size and resolution together determine how sharp a screen looks. When the same resolution is spread across a larger screen, each pixel gets bigger, so text and images can look softer up close. This relationship is called pixel density, measured in pixels per inch (PPI).
Pixel density by monitor size
PPI values below are calculated from each screen’s diagonal size and resolution.
Monitor size | Resolution | Pixel density |
|---|---|---|
23.8 inches | Full HD (1920 × 1080) | About 93 PPI |
27 inches | Full HD (1920 × 1080) | About 82 PPI |
27 inches | QHD (2560 × 1440) | About 109 PPI |
27 inches | 4K UHD (3840 × 2160) | About 163 PPI |
31.5 inches | QHD (2560 × 1440) | About 93 PPI |
31.5 inches | 4K UHD (3840 × 2160) | About 140 PPI |
34 inches (ultrawide) | WQHD (3440 × 1440) | About 110 PPI |
As a general guide, Full HD looks sharp at 24 inches, QHD is a good match for 27 inches, and 4K suits 27- to 32-inch monitors. Higher pixel density makes text crisper, but it also asks more of your computer’s graphics, especially in games.
Display scaling on high-resolution monitors
On high-density screens, text and icons can appear small at their native size. Windows display scaling enlarges them while keeping the extra sharpness. You can adjust it in Settings > System > Display. Learn more about monitor resolution.
How Far Should You Sit From Your Monitor?
Most people should sit about 20 to 40 inches from a computer monitor, measured from the eyes to the front of the screen. The U.S. Occupational Safety and Health Administration (OSHA) gives this as the generally preferred viewing distance and recommends keeping the monitor at least 20 inches away [OSHA].
Within that range, larger monitors usually feel more comfortable a little farther back, so you can see the whole screen without turning your head. Smaller or lower-resolution text may require sitting closer.
Suggested viewing distance by monitor size
These are general starting points within the 20- to 40-inch range. Adjust based on your eyesight, the text size, and what feels comfortable.
Monitor size | Suggested starting distance |
|---|---|
21.5 to 24 inches | About 20 to 28 inches |
27 inches | About 24 to 32 inches |
31.5 to 32 inches | About 28 to 36 inches |
34-inch ultrawide | About 28 to 36 inches |
49-inch super ultrawide | About 32 to 40 inches |
Check your desk depth
Your desk depth limits how far back a monitor can sit. Many desks are 24 to 30 inches deep, and the monitor stand takes up part of that space. If your desk is shallow, a smaller monitor, a slim stand, or a monitor arm can help you reach a comfortable distance. Learn more about monitor ergonomics and eye comfort.
How to Choose the Right Monitor Size
To choose the right monitor size, start with how you’ll use the screen, then check that it fits your desk and viewing distance and pair it with a resolution that keeps it sharp. These steps can help you narrow it down.
Start with how you’ll use it
Everyday tasks and schoolwork: A 24-inch Full HD monitor covers browsing, documents, and video calls on most desks.
Multitasking and office work: A 27-inch QHD monitor fits two windows side by side comfortably. A 34-inch ultrawide adds even more horizontal space.
Gaming: Many competitive players prefer 24 to 27 inches to keep the whole screen in view. Larger and curved screens suit immersive, story-driven games.
Photo, video, and design work: A 27- to 32-inch 4K monitor shows fine detail and leaves room for editing tools and timelines.
Measure your space
Measure your desk width and depth before choosing a size. Leave room for the stand, keyboard, and a viewing distance of at least 20 inches. Use the approximate screen widths in the table above as a starting point, and check the product’s full dimensions with the stand.
One large monitor or two smaller monitors?
Two 24-inch monitors give you separate screens for different apps, while a single ultrawide gives you a continuous workspace without a bezel down the middle. A 49-inch super ultrawide offers roughly the screen area of two 27-inch monitors side by side. Learn how to set up multiple monitors.
Choosing a monitor size for a laptop
An external monitor can give a laptop user much more screen space than the built-in 13- to 16-inch display. At a desk, a 24- or 27-inch USB-C monitor is a common choice because one cable can carry video, data, and charging on compatible laptops. For travel, a 14- to 16-inch portable monitor, such as the HP Series 5 Pro 14-inch portable monitor, adds a second screen that fits in a laptop bag. Learn more about portable monitors.
Ready to compare sizes? Shop HP monitors in sizes from compact 22-inch screens to 49-inch super ultrawides.
Frequently Asked Questions About Monitor Size
Is a 24-inch or 27-inch monitor better?
A 24-inch monitor is better for smaller desks, dual-monitor setups, and Full HD resolution. A 27-inch monitor is better for multitasking and fits more content on screen, especially at QHD or 4K resolution. Both sizes work well at a typical desk viewing distance of 20 to 30 inches.
Is a 32-inch monitor too big for a desk?
A 32-inch monitor isn’t too big for most desks that are at least 30 inches deep, as long as you can sit roughly 28 inches or more from the screen. On a shallower desk, a 32-inch monitor may feel overwhelming, and a 27-inch monitor or a monitor arm may be more comfortable.
Is 1080p good enough for a 27-inch monitor?
Full HD (1080p) works on a 27-inch monitor for everyday tasks and gaming, but text can look less sharp up close because the pixels are larger, at about 82 pixels per inch. QHD (1440p) or 4K resolution gives a 27-inch monitor noticeably crisper text and images.
What size monitors work best for a dual-monitor setup?
Two 24-inch monitors are a popular choice for a dual-monitor setup because they fit side by side on most desks without excessive head turning. Two 27-inch monitors give more space but need a desk about 50 inches wide or more. Matching the size and resolution of both monitors makes moving windows between screens smoother.
Related Monitor Topics
Computer monitor basics: How monitors work and the specs that matter most
Monitor resolution: How Full HD, QHD, and 4K compare
Aspect ratio and ultrawide monitors: How screen shape affects width, height, and workspace
Multi-monitor setups: How to connect and arrange two or more monitors
Ergonomics and eye comfort: How to position a monitor for comfortable viewing
Portable monitors: Compact second screens for laptops on the go
