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
    View on Amazon

    Dell S2722DC 27" QHD USB-C

    $279.99
    • 1440p
    • USB-C 65W
    View on Amazon

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    Helpful Resources

    Easy Compare is a free tool to help you visually compare the dimensions of different displays. This tool is for reference purposes only. Actual appearance may vary based on resolution, bezel size, and other factors.