21" 4:3 vs 27" 16:9 Monitor Size Comparison
Visual comparison of 21" 4:3 vs 27" 16:9. The 27" 16:9 has 47% more screen area (23.5" × 13.2" vs 16.8" × 12.6"). Free interactive tool.
Quick Comparison Facts
47%
More screen area
16.8" × 12.6"
21" 4:3 (W×H)
23.5" × 13.2"
27" 16:9 (W×H)
211.7 vs 310.2
Area (sq in)
Display 1
Display 2
Size Comparison
Display 1: 21in 4x3 (horizontal)
Display 2: 27in 16x9 (horizontal)
Comparison Details
Display 1
21in diagonal
16.8" × 12.6" (W×H)
211.7 sq in area
4:3 · ~114 PPI (1440p)
Difference
47%
area difference
29%
diagonal difference
Display 2
27in diagonal
23.5" × 13.2" (W×H)
310.2 sq in area
16:9 · ~163 PPI (4K)
Which Size Should You Choose?
Choose the 21" 4:3 if:
- You have a standard-depth desk (24" or less)
- You primarily do single-app focused work
- You prefer higher pixel density at closer distances
- Budget or desk space is limited
Choose the 27" 16:9 if:
- You multitask with side-by-side windows
- You work with large spreadsheets, timelines, or code
- Gaming immersion is important to you
- You have a deeper desk (28"+ recommended)
Popular Options on Amazon
📺27" 16:9 Options
LG 27" UltraGear QHD Gaming
$246.99
- ✓1440p
- ✓144Hz
Dell S2722DC 27" QHD USB-C
$279.99
- ✓1440p
- ✓USB-C 65W