Monitor measurement calculator
Calculate physical monitor or display width, height, aspect ratio, area, PPI, and scaling comfort from diagonal size and resolution.
Enter your monitor diagonal and resolution to estimate physical dimensions and pixel density.
Important: A browser cannot detect the physical inch size of your monitor automatically. Enter the diagonal from the product label or monitor specs for the best estimate.
Estimated physical size
23.5 × 13.2 in
27 in diagonal, 16:9 aspect ratio
108.8 PPI
16:9
310 sq in
Balanced
Physical monitor size helps compare desk fit, while PPI helps compare text sharpness. For many users, 24-inch 1080p, 27-inch 1440p, and 32-inch 4K are comfortable pairings.
Use the estimated width to compare against available desk space.
Higher PPI generally means sharper text and UI, especially at close viewing distances.
This calculator estimates physical size from the diagonal you enter. It does not scan or detect your actual monitor inches.
How to use it
Use the monitor size checker to answer practical questions like what size is my monitor, how wide is a 27-inch monitor, and how sharp is this resolution at my desk. Enter the diagonal and resolution to estimate physical width, height, PPI, and comfort notes.
Limitation: Browsers cannot reliably detect physical monitor inches. The calculator estimates dimensions from the diagonal you enter, so use real monitor specs for the best result.
A 24-inch 1080p monitor is a compact baseline for smaller desks.
A 27-inch 1440p monitor is a common balanced choice for work and gaming.
A 32-inch 4K monitor is larger and sharper, but it works best with enough desk depth.
No. Browsers do not reliably expose physical monitor diagonal size, so this checker estimates monitor dimensions from the diagonal you enter.
Check the model number, product label, order page, manual, or manufacturer specs. Monitor size is measured diagonally, not by width.
No. Monitor size is physical diagonal measurement, while resolution is the pixel grid such as 1920 by 1080 or 2560 by 1440.
Helpful references
Use these pages to compare monitor dimensions, display size, viewport size, and screen resolution.
Guide collection
Use these supporting guides to understand the tool result and next testing steps.
Continue with another ScreenMetricLab utility.
Need more screen sizing help? Explore device viewport sizes, compare popular screens, or read our screen and viewport guides.
