Simplify any resolution to its aspect ratio and get missing dimensions.
Common resolutions:
Aspect ratio
Total pixels
Megapixels
Type the horizontal and vertical resolution in pixels, e.g. 3440 × 1440.
The calculator simplifies it to its lowest terms, like 21:9, and names the common format.
Enter a width or height to compute the matching other side at the same ratio.
Aspect ratio describes the proportional width and height of a screen. 16:9 is the standard widescreen format, 21:9 and 32:9 are ultrawide formats that widen your field of view, and 4:3 / 5:4 are older formats. The right ratio affects both immersion and competitive advantage.
Knowing your exact aspect ratio lets you scale video, windowed games and streaming overlays without stretching. This tool also computes total pixels — handy for estimating GPU load when switching between formats.
16:9 is by far the most common for TVs and monitors, followed by 16:10 and 21:9 for ultrawide gaming, and 4:3 for older displays and retro content.
A wider horizontal field of view, which is great for immersion in RPGs and racing games and can give a visible advantage in competitive shooters that support it.
Divide both width and height by their greatest common divisor (GCD). For 2560×1440 the GCD is 160, giving 16:9. This tool does that math instantly.
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