20 Inch Monitor Dimensions
A 20 inch monitor has a screen 17.4 in44.3 cm wide and 9.8 in24.9 cm tall (44.3 cm17.4 in x 24.9 cm9.8 in). The 20 inches is measured diagonally across the glass, corner to corner. The monitor itself is always a little bigger than these numbers.
Below you can see it to scale and check it against your desk. You will also find the resolution and scaling that suit this size.
- Width
- 17.4 in 44.3 cm
- Height
- 9.8 in 24.9 cm
- Diagonal
- 20 in 50.8 cm
- Aspect ratio
- 16:9
How big is a 20 inch monitor?
Here it is drawn to scale against the largest size in our chart, the 49 inch. The screen covers 171 sq in1,103 sq cm.
- Diagonal
- 20 in (50.8 cm)
- Width
- 17.4 in44.3 cm · 44.3 cm17.4 in
- Height
- 9.8 in24.9 cm · 24.9 cm9.8 in
- Screen area
- 171 sq in1,103 sq cm
- Aspect ratio
- 16:9
- Perimeter
- 54.5 in138.4 cm
- Pixel density at 1920 × 1080
- 110 PPI
- Pixel density at 2560 × 1440
- 147 PPI
- Pixel density at 3840 × 2160
- 220 PPI
How big is a 20 inch monitor with the stand?
Stands add height and depth, and frame widths vary. Here are the real measurements of popular 20 inch monitors from their makers' spec sheets.
Each model name links to its maker's spec sheet. Prices open on Amazon (affiliate links).
What did the real models show?
The table lists three 20 inch monitors from ViewSonic and Dell. Their bodies are 18.2 in46.3 cm to 18.6 in47.2 cm wide, or 0.8 in2.1 cm to 1.1 in2.9 cm more than the screen itself. With under 1 in (2.5 cm) between them, the frame rarely decides whether one of these fits.
Without its stand, the ViewSonic VA2025-H is the thinnest at 1.0 in2.5 cm deep. At the other end, the Dell E2026H and ViewSonic VA2055Sm are 1.9 in4.8 cm deep.
Weights run from 3.09 lb1.4 kg for the ViewSonic VA2025-H to 5.51 lb2.5 kg for the ViewSonic VA2055Sm. A monitor arm rated for 6 lb2.7 kg or more covers the weight of every model here.
With their stands, the makers list heights of 12.9 in32.8 cm to 14.4 in36.7 cm, so measure under any shelf. On their stands, they take 6.7 in17.1 cm to 8.3 in21.2 cm of desk depth.
They use two VESA patterns, from 75 x 75 to 100 x 100 mm. The most common is 100 x 100 mm, on two of them, but check your exact model before you buy an arm.
Will a 20 inch monitor fit on your desk?
Enter the space on your desk, under any shelf or cabinet. We check it against the screen, and the table above shows what each stand adds.
How much desk do two or three need?
Two 20 inch screens side by side need at least 34.9 in88.6 cm (88.6 cm34.9 in) of desk width for the screens alone. Three need 52.3 in132.8 cm (132.8 cm52.3 in). Add the frame widths from the table above.
Two side by side are about as wide as one 38 inch ultrawide, with a frame down the middle.
How far should you sit from a 20 inch monitor?
Desk screens are usually viewed from 20 to 30 in (50 to 75 cm). The table shows how much of your view a 20 inch screen fills at each distance. It feels very wide at 18 in46 cm, wide at 20 in51 cm and ideal at 24 to 32 in61 to 81 cm.
Which resolution suits a 20 inch monitor?
Higher resolution looks sharper but makes text smaller, so you need display scaling. At 20 inches, 1920 × 1080 gives 110 PPI and 3840 × 2160 gives 220 PPI. The table shows the Windows scaling each needs.
At this size, 1920 × 1080 looks crisp and 2560 × 1440 and 3840 × 2160 look very sharp. Even 1920 × 1080 needs 125% scaling here, so text stays readable.
Sit farther away than the last column and you will not see single pixels. See every resolution in the chart.
How does a 20 inch monitor compare with other sizes?
The next size up, the 21.5 inch monitor, has 16% more screen area. Area grows with the square of the diagonal, so a few inches feel bigger than they sound.
That makes the nearest size a clear step away.
Shop 20 inch monitors and desk gear
Affiliate linksMore questions about 20 inch monitors
What are the dimensions of a 20 inch monitor in cm?
The screen is 44.3 x 24.9 cm, with a diagonal of 50.8 cm.
Is a 20 inch monitor too big for a desk?
At 24 in away it fills 40 degrees of your view. Above about 40 degrees, you may need to move your head to see the edges.
Is a 20 inch monitor 20 inches wide?
No. 20 inches is the diagonal, and the screen is 17.4 in wide.
What resolution is best for a 20 inch monitor?
1920 × 1080 gives 110 PPI at this size, which suits 125% Windows scaling. Higher resolutions look sharper but need more scaling, so text stays readable.
How much does a 20 inch monitor weigh?
The models above weigh 3.09 lb (1.4 kg) to 5.51 lb (2.5 kg) without the stand. The lightest is the ViewSonic VA2025-H, and the heaviest is the ViewSonic VA2055Sm.
Which of these 20 inch monitors is the thinnest?
The ViewSonic VA2025-H is the thinnest in the table, at 1.0 in (2.5 cm) deep without the stand. On an arm, that is close to all the depth it takes, while a stand needs more desk.
How we measure
Screen width = diagonal x a / sqrt(a^2 + b^2) and height = diagonal x b / sqrt(a^2 + b^2) for an a:b screen. Viewing angle = 2 x arctan(half the screen width / distance). Pixel visibility uses 1 arcminute, the limit of 20/20 vision.
Model sizes come from each maker's published spec sheet, linked in the table. Last checked 2026-10-09.