Practical tools for measured work
Ultrawide Monitor Equivalent Calculator
Compare an ultrawide with 16:9 screens at the same physical height or width and with a bezel-free dual-screen split.
Same-height comparison is usually the clearest way to compare vertical workspace. The dual-screen figure ignores bezels and assumes each half keeps the ultrawide panel height.
How it works
How to use it: enter the advertised diagonal, physical aspect ratio and native resolution of an ultrawide display.
Method. The same-height 16:9 diagonal preserves panel height; the same-width comparison preserves overall width.
Example. A 34-inch 21:9 display has roughly the height of a 27-inch 16:9 display, with extra width.
Current-input example
The result above uses these exact values. This snapshot is included when the page is printed so the output can be checked against the original measurements.
- Ultrawide diagonal
- 34 in
- Aspect width
- 21
- Aspect height
- 9
- Horizontal pixels
- 3440
- Vertical pixels
- 1440
Primary result: Physical panel: 31.3 x 13.4 in.
Before using the result
- Measure from the datum or reference edge described by this tool, and do not mix inside, outside and centerline dimensions.
- Keep inputs in the displayed units and preserve more precision than the final cutting or purchasing tolerance requires.
- When the result is close to a limit, verify it with a test piece, field measurement, manufacturer drawing or qualified project professional.
Limitations
Nominal 21:9 panels often use a more precise ratio such as 43:18. Curvature, bezels, scaling and pixel density affect practical equivalence. Dual-screen comparison does not model a centre bezel.
Frequently asked questions
Is 3440 by 1440 exactly 21:9?
No. Its pixel ratio is about 2.389:1, while 21:9 simplifies to 2.333:1. Enter the physical ratio supplied for the panel when known.
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