Monitor Size Comparison & PPI Calculator
Enter the size, aspect ratio and resolution of two monitors to compare their real width, height and PPI. Both screens are drawn to the same scale, so 27 vs 32 inch is clear at a glance.
Check the fields in red. Size can be 1 to 200 inches.
B has 40.5% more screen area than A
- A 27" 16:9
- B 32" 16:9
| Item | A | B | B vs A |
|---|---|---|---|
| Width | 59.8 cm23.5 in | 70.8 cm27.9 in | +18.5% |
| Height | 33.6 cm13.2 in | 39.8 cm15.7 in | +18.5% |
| Area | 2010 cm²311.5 in² | 2823 cm²437.6 in² | +40.5% |
| PPI | 108.8 | 137.7 | +26.6% |
| Pixel pitch | 0.233 mm | 0.184 mm | |
| Pixel blend distance | 80 cm32 in | 63 cm25 in |
Pixel blend distance is calculated for 20/20 vision (1 arcminute). It is not a recommended viewing distance.
Width and height come from the aspect ratio. Monitors sold as "21:9" can have a slightly different panel ratio, so enter the ratio yourself for an exact result.
Monitor Test: Dead Pixel and Ghosting Test Monitor Refresh Rate Test
What inches, aspect ratio and PPI mean
- Inches
- Monitor size is the diagonal of the screen. One inch is 2.54 cm.
- Aspect ratio
- The ratio of width to height. At the same diagonal, a wider ratio makes the screen wider and less tall.
- PPI
- Pixels per inch. The higher it is, the denser text and images look.
- Pixel blend distance
- The distance where one pixel shrinks below 1 arcminute (1/60 of a degree). With 20/20 vision, past this point you can no longer pick out single pixels.
Popular monitor size comparisons
How much bigger the right monitor is than the left one. Tap a pair to load it into the calculator.
| Pair | Width | Height | Area |
|---|---|---|---|
| +6.6 cm | +3.7 cm | +26.6% | |
| +11.1 cm | +6.2 cm | +40.5% | |
| +17.7 cm | +10.0 cm | +77.8% | |
| +8.5 cm | -5.8 cm | -4.3% | |
| +19.6 cm | +0.4 cm | +34.4% | |
| +40.4 cm | -0.3 cm | +49.5% |
Real size and PPI by size and resolution
Monitor dimensions and PPI, worked out in advance.
| Monitor | Width × height | PPI |
|---|---|---|
| 24" FHD1920×1080 | 53.1 × 29.9 cm | 91.8 |
| 24" QHD2560×1440 | 53.1 × 29.9 cm | 122.4 |
| 27" FHD1920×1080 | 59.8 × 33.6 cm | 81.6 |
| 27" QHD2560×1440 | 59.8 × 33.6 cm | 108.8 |
| 27" 4K UHD3840×2160 | 59.8 × 33.6 cm | 163.2 |
| 32" QHD2560×1440 | 70.8 × 39.8 cm | 91.8 |
| 32" 4K UHD3840×2160 | 70.8 × 39.8 cm | 137.7 |
| 34" 21:9 UWQHD3440×1440 | 79.4 × 34.0 cm | 109.7 |
| 49" 32:9 DQHD5120×1440 | 119.8 × 33.7 cm | 108.5 |
Common questions
What is the PPI of a 27 inch QHD monitor?
A 27 inch 2560×1440 (QHD) screen is about 108.8 PPI with a 0.233 mm pixel pitch. A 27 inch 4K (3840×2160) screen is denser at 163.2 PPI.
How much bigger is a 32 inch monitor than a 27 inch?
At 16:9, the 32 inch is 11.1 cm wider and 6.2 cm taller, with 40.5% more screen area.
How is PPI calculated?
Find the diagonal in pixels from the width and height, then divide by the diagonal in inches. For 27 inch QHD: √(2560²+1440²) ÷ 27 ≈ 108.8.
How far should I sit from my monitor?
This calculator does not pick a right distance for you. It shows where pixels stop being visible with 20/20 vision (about 80 cm for 27 inch QHD).
Why do 34 inch 21:9 and 16:9 monitors differ in size?
Size is the diagonal, so the wider the screen, the shorter it gets. A 34 inch 21:9 screen is 34.0 cm tall, lower than a 34 inch 16:9 at 42.3 cm.
Last reviewed 2026-11-12