Monitor Size Calculator
The diagonal never tells you the footprint — same 34″ can be 31.5″ or 24.4″ wide. Get exact width and height for desk and mount planning.
Monitor diagonal
Common desk widths: 27″ 16:9 ≈ 23.5″ wide; 34″ 21:9 ≈ 31.5″ wide — check your desk clearance.
Physical size
Width23.5 in / 59.8 cm
Height13.2 in / 33.6 cm
1440p density at this size108.8 PPI
Same diagonal + different ratio = different footprint: 21:9 is much wider than 16:9 at the same diagonal. Use this to check desk space, VESA arm clearance, and wall mounts.
Why the diagonal is not the footprint
Scenario: your desk fits 30″ of width; is a 34″ ultrawide going to fit? A 34″ 21:9 is about 31.5″ wide — too big. A 32″ 16:9 is about 27.9″ wide — it fits. The diagonal alone cannot tell you either number.
Example: 27″ 16:9 = 23.5″ wide × 13.2″ tall; 34″ 21:9 = 31.5″ wide × 13.1″ tall (same height as 27″ 16:9 — that is why 21:9 feels like “more width”); 49″ 32:9 ≈ 45.2″ wide — roughly two 24″ monitors side by side.
Boundaries: measurements are the panel area; bezels add 0.5–1.5″ per edge, and VESA stand arms need their own clearance. Use the PPI calculator to judge sharpness at the same footprint.