🦊Foxulator
📐

屏幕比例计算器

输入分辨率计算屏幕比例，保持比例缩放。支持多种分辨率预设和社交媒体规格。

px
px
Aspect Ratio
16:9
Widescreen (TV, Monitor)
Resolution
1920 × 1080
Total Pixels
2.07 MP
2,073,600 px
Megapixels
2.07 MP
Resolution Grade
Full HD

Visual Preview

16:9

Common Resolutions

About Aspect Ratio

  • • 16:9: Standard ratio for modern TVs, monitors, and YouTube. Used by HD, FHD, and 4K displays.
  • • 4:3: Classic ratio used by old TVs and iPads. Good for documents and web browsing.
  • • 21:9: Used by cinema screens and ultrawide monitors. Great for immersive gaming and movies.
  • • 1:1: Square format, the default ratio for Instagram feed posts.

📖 使用方法

  1. Enter width and height in pixels
  2. Or select a resolution preset
  3. View aspect ratio, total pixels, and resolution grade
  4. Use Resize mode to scale while maintaining aspect ratio
  5. Use From Ratio mode to calculate dimensions from one known value

✨ 主要功能

  • ✓Automatic aspect ratio calculation (16:9, 4:3, 21:9, etc.)
  • ✓Various resolution presets (HD to 8K)
  • ✓Social media formats (Instagram, YouTube, etc.)
  • ✓Resize while maintaining aspect ratio
  • ✓Calculate resolution from ratio
  • ✓Total pixels and megapixels display
  • ✓Resolution grade indicator (SD, HD, FHD, QHD, 4K, 8K)
  • ✓Visual aspect ratio preview

📐 计算公式

Ratio = Simplify with GCD(width, height) → width÷GCD : height÷GCD

💡 计算原理

  • •Aspect ratio represents the proportional relationship between width and height, simplified using GCD.
  • •Example: 1920×1080 has a GCD of 120, resulting in 16:9.
  • •Same ratio can have different clarity and file sizes depending on resolution.
  • •Resizing while maintaining ratio prevents image distortion.
  • •Different social media platforms have different optimal ratios and resolutions.

❓ 常见问题

Q. What is the difference between 16:9 and 21:9?

A. 16:9 is standard widescreen (TV, YouTube), 21:9 is ultrawide (movies, gaming monitors). 21:9 is wider for better immersion but may have letterboxing on some content.

Q. What is the best ratio for Instagram?

A. Feed square: 1:1 (1080×1080), Portrait: 4:5 (1080×1350), Stories/Reels: 9:16 (1080×1920).

Q. What is the recommended YouTube thumbnail size?

A. 1280×720 pixels (16:9 ratio) is recommended. Minimum should be 640×360.

Q. What is the difference between 4K and FHD?

A. 4K (3840×2160) has 4 times the pixels of FHD (1920×1080). Both are 16:9 but 4K is much sharper.

Q. Does resizing while maintaining ratio affect quality?

A. Downscaling usually has minimal quality loss. However, upscaling can cause blur as pixels are interpolated.

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