Is 2560×1080 the same as 64:27?

Yes — divide both sides by 40 (the GCD) to get 64:27. Use aspect-ratio: 64 / 27 and padding-top 42.19% for the legacy fallback.

How do I keep 2560×1080 from stretching?

Set aspect-ratio: 64 / 27 on the container and use object-fit: cover (crop-fill) or contain (letterbox). Never stretch via width/height alone.

What aspect ratio is 2560×1080?

64:27 (~2.3704:1)

2560×1080 simplifies to 64:27 (GCD 40). In decimal that is ~2.3704:1 — a custom 64:27 frame used for ultrawide fhd monitors. The calculator below is preloaded to 64:27 so you can solve any partner dimension at the same ratio.

No named calculator page covers this exact ratio, but the solver below handles any ratio — treat it as 64:27 for math.

Ratio W:Ratio H

Width (px)Height (px)

1920 × 810

Exact ratio: 64:27 · CSS: aspect-ratio: 64 / 27 · padding-top fallback: 42.19%

How the ratio was computed

GCD(2560, 1080) = 40

2560 ÷ 40 = 64 → 1080 ÷ 40 = 27

→ 64:27 (dec. 2.3704:1) · padding-top 42.19%

CSS: aspect-ratio: 64 / 27

All math is local and instantly invertible — swap width and height and the ratio stays the same, just rotated. URL sharing works: ?w=2560&h=1080 style deep-links still resolve via the ratio parameters.

Quick 64:27 partner table

Width	Height (64:27)
640px	270px
1280px	540px
1920px	810px
2560px	1080px
3840px	1620px

Other sizes in 64:27

No other catalogued sizes share 64:27 exactly — the table above covers the common computed variants.

Related lookups

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Tip: designing for 2560×1080 uw-fhd? Master at 2560×1080 exactly, then export lighter proxies by halving both sides (e.g. 1280×540) — the ratio stays 64:27 and downscales stay sharp.