/> >
Instant Processing
" Design & Dev Tool

Outil de Ratio d'Aspect et de Résolution

Saisissez n'importe quelle dimension ci-dessous pour trouver instantanément la résolution manquante, ou extrayez le ratio d'aspect exact d'une taille de pixel. Précision mathématique de 100% avec des aperçus visuels en direct.

:

Calculated Aspect Ratio:

16 : 9

Greatest Common Divisor (GCD): 120

Universal 2026 Presets

Frequently Asked Questions

What is aspect ratio?

Aspect ratio is the proportional relationship between width and height. Common ratios: 16:9 (widescreen), 4:3 (standard), 1:1 (square), 9:16 (vertical video).

How do I calculate aspect ratio?

Enter any width and height. The tool instantly calculates the ratio, shows equivalent dimensions, and provides CSS code.

What ratio is best for YouTube?

16:9 (1920×1080) is standard for YouTube. Shorts use 9:16 (1080×1920). The tool converts between all common ratios.

Related Tools

Photo Resizer Online thumbnail safe zone YouTube Thumbnail Previewer Video Frame Extractor

Standard Device Resolutions & Aspect Ratios (2026 Update)

Below is the ultimate cheat sheet for UI/UX designers and video editors attempting to build "pixel-perfect" boundaries across modern Apple and Android hardware.

Device / Platform Resolution (px) Exact Aspect Ratio Primary Use Case
iPhone 16 Pro Max 1320 - 2868 ~ 19.5:9 iOS UI Design, TikTok bounds
iPhone 16 / 15 1179 - 2556 ~ 19.5:9 Mainstream iOS Testing
iPad Pro 13" (M4) 2064 - 2752 3:4 / 4:3 Tablet interfaces, landscape reading
MacBook Pro 14" 3024 - 1964 ~ 1.54:1 Retina Desktop Design
4K UHD Video 3840 - 2160 16:9 YouTube, Netflix standard
8K Cinema 8192 - 4320 256:135 (approx 1.9:1) High-end Film Production
Instagram Feed (Tall) 1080 - 1350 4:5 Maximizing social feed space
Shorts / Reels 1080 - 1920 9:16 Vertical Video Marketing
Ultrawide Monitors 3440 - 1440 21:9 Immersive Gaming & Productivity

Understanding The Math: GCD

When you input a resolution like `1920x1080`, how do we know it's `16:9`? We use the Greatest Common Divisor (GCD). The largest number that perfectly divides both 1920 and 1080 without a remainder is `120`. If you divide `1920 / 120 = 16`, and `1080 / 120 = 9`. Therefore, the ratio is exactly 16:9.

Copied to clipboard! "