2.39:1 Cinema Calculator
CinemaScope 2.39:1 — the classic anamorphic widescreen. Solve cinema dimensions and letterbox sizing.
2.39:1 (often written 2.40:1 or 239:100) is the anamorphic widescreen standard — 2048×858 (2K Scope) and 4096×1716 (4K Scope) are both 2.39:1. Fit it on a 16:9 screen and you get the famous letterbox bars. Editors mastering DCPs and streaming Scope masters need pixel-exact framing or bars drift.
1920 × 803
Exact ratio: 239:100 · CSS: aspect-ratio: 239 / 100 · padding-top fallback: 41.84%
Formula
height = width × 100 ÷ 239
width = height × 239 ÷ 100
// padding-top fallback: 41.84% — keeps layout stable before the image loads
aspect-ratio: 239 / 100 — 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=239&rh=100) or bookmark a preset.
Common 239:100 resolutions
| Width | Height | Use |
|---|---|---|
| 320px | 134px | |
| 640px | 268px | |
| 1280px | 536px | |
| 1920px | 803px | |
| 2560px | 1071px | |
| 3840px | 1607px | 4K |
| 5120px | 2142px | |
| 7680px | 3213px |
When to use 239:100
- DCP Scope masters (2048×858, 4096×1716)
- Letterboxed scope on 16:9
- Anamorphic lens framing & desqueeze preview
Pitfalls to avoid
- 2.35, 2.39 and 2.40 are used interchangeably — pick 239:100 and stick to it for math
- Scope bars on a 16:9 timeline are ~21.3% height each side when centered
CSS snippet
Modern:
.frame { aspect-ratio: 239 / 100; 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: 41.84%; }
.wrap > * { position: absolute; inset: 0; }Pair with object-fit: contain to letterbox without cropping, or cover to fill and crop safely.
Platform reference
Frequently asked
Is it 2.35:1 or 2.39:1?
Historically 2.35:1, modern spec is 2.39:1 (sometimes rounded to 2.40). Use 239÷100 for calculations.
What is 2.39:1 in a 1920-wide timeline?
1920×803 — leaving ~138 px top + bottom bar each when centered in 1920×1080.
How does anamorphic desqueeze relate?
An anamorphic lens squeezes 2× horizontally on capture; desqueezing 2× restores scope. The final frame is still 2.39:1.
Tip: add ?w=1920 or ?h=1080 to this URL to prefill the calculator — useful for linking from a spec doc.
Other ratios
- 16:9 Aspect Ratio Calculator
- 4:3 Aspect Ratio Calculator
- 1:1 Square Calculator
- 9:16 Vertical Calculator
- 21:9 Ultrawide Calculator
- 3:2 Aspect Ratio Calculator
- 16:10 Aspect Ratio Calculator
- 4:5 Portrait Calculator
Look up by resolution
- 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
What aspect ratio is 1920×1080? → · Full FAQ →