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RatioCalc

5:3 Widescreen Calculator

5:3 (1.66:1) widescreen — between 16:10 and 16:9. Solve its partner dimension cleanly.

5:3 (1.66:1) sits between 16:10 (1.60) and 16:9 (1.78) — an uncommon but handy widescreen for projection, panoramic prints and custom signage where neither standard fits. 1500×900, 1920×1152 and 2560×1536 are all 5:3. The ratio reduces no further than 5:3.

:

1920 × 1152

Exact ratio: 5:3 · CSS: aspect-ratio: 5 / 3 · padding-top fallback: 60.00%

Formula

height = width × 3 ÷ 5

width = height × 5 ÷ 3

// padding-top fallback: 60.00% — keeps layout stable before the image loads

aspect-ratio: 5 / 3 — modern replacement for the padding hack

All math runs locally in your browser. No upload. Type either side, the other solves live — and the URL updates so you can share an exact pair (?w=1920&rw=5&rh=3) or bookmark a preset.

Common 5:3 resolutions

WidthHeightUse
320px192px
640px384px
1280px768px
1920px1152px
2560px1536px
3840px2304px4K
5120px3072px
7680px4608px

Exact known sizes in this ratio

When to use 5:3

Pitfalls to avoid

CSS snippet

Modern:

.frame { aspect-ratio: 5 / 3; width: 100%; overflow: hidden; }
.frame > img { width: 100%; height: 100%; object-fit: cover; }

Legacy padding hack (for very old browsers):

.wrap { position: relative; width: 100%; padding-top: 60.00%; }
.wrap > * { position: absolute; inset: 0; }

Pair with object-fit: contain to letterbox without cropping, or cover to fill and crop safely.

Platform reference

YouTube thumbnail — 1280 × 720 (16:9)
YouTube Shorts — 1080 × 1920 (9:16)
Instagram feed post — 1080 × 1350 (4:5)
Instagram story — 1080 × 1920 (9:16)
TikTok video — 1080 × 1920 (9:16)
X/Twitter card — 1200 × 675 (16:9)

Frequently asked

Is 5:3 common?

No — it is a niche custom ratio. Standard widescreen is 16:9; 5:3 is used when a venue wants something in-between.

What is 5:3 at 1920 wide?

1152 tall — 1920 × 3 ÷ 5 = 1152.

How does 5:3 relate to 3:5?

They are reciprocals: 5:3 landscape = 3:5 portrait.

Tip: add ?w=1920 or ?h=1080 to this URL to prefill the calculator — useful for linking from a spec doc.

Other ratios

Look up by resolution

What aspect ratio is 1920×1080? → · Full FAQ →

Privacy: ratio math never leaves your browser. No account, no upload — the pair you type stays on-device. Shareable URLs encode only dimensions, never personal data.