What aspect ratio is 1280×1024?
5:4 (~1.2500:1)
1280×1024 simplifies to 5:4 (GCD 256). In decimal that is ~1.2500:1 — a standard 5:4 frame used for legacy 5:4 lcds, industrial panels. The calculator below is preloaded to 5:4 so you can solve any partner dimension at the same ratio.
→ Open the full 5:4 Aspect Ratio Calculator →
1920 × 1536
Exact ratio: 5:4 · CSS: aspect-ratio: 5 / 4 · padding-top fallback: 80.00%
How the ratio was computed
GCD(1280, 1024) = 256
1280 ÷ 256 = 5 → 1024 ÷ 256 = 4
→ 5:4 (dec. 1.2500:1) · padding-top 80.00%
CSS: aspect-ratio: 5 / 4
All math is local and instantly invertible — swap width and height and the ratio stays the same, just rotated. URL sharing works: ?w=1280&h=1024 style deep-links still resolve via the ratio parameters.
Quick 5:4 partner table
| Width | Height (5:4) |
|---|---|
| 640px | 512px |
| 1280px | 1024px |
| 1920px | 1536px |
| 2560px | 2048px |
| 3840px | 3072px |
Other sizes in 5:4
No other catalogued sizes share 5:4 exactly — the table above covers the common computed variants.
Related lookups
- 1920×1080 — 1920×1080 Full HD
- 1280×720 — 1280×720 HD
- 3840×2160 — 3840×2160 4K UHD
- 2560×1440 — 2560×1440 QHD
- 1366×768 — 1366×768 WXGA
- 3440×1440 — 3440×1440 UW-QHD
← Back to the calculator · FAQ →