Design Tools

Aspect Ratio Calculator Advanced

Calculate aspect ratios, resize images proportionally, and convert between ratios. Advanced aspect ratio calculations.

Use Aspect Ratio Calculator Advanced to get instant results without uploads or sign-ups. Everything runs securely in your browser for fast, reliable output.

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About this tool

Aspect ratios maintain proportions when resizing. Common ratios: 16:9 (widescreen), 4:3 (standard), 1:1 (square), 21:9 (ultrawide).

Used in video, photography, web design, and responsive layouts. CSS aspect-ratio property simplifies implementation.

Usage examples

Widescreen

1920×1080 resolution

1920:1080 = 16:9 ratio

How to use

  1. Enter width and height
  2. Calculate aspect ratio
  3. Get simplified ratio
  4. Resize proportionally

Benefits

  • Calculate ratios
  • Simplify fractions
  • Proportional resizing
  • Common ratio presets
  • Maintain aspect
  • Design tool

FAQs

What is aspect ratio?

Aspect ratio is width:height proportion. 16:9 means 16 units wide for every 9 units tall. Common: 16:9 (HDTV), 4:3 (old TV), 1:1 (Instagram square), 21:9 (cinema). Maintains proportions when scaling. Preserves image/video composition when resizing.

What aspect ratio is best for modern content?

Depends on platform: YouTube/TV: 16:9, Instagram/Stories: 9:16, Instagram Feed: 1:1 or 4:5, TikTok: 9:16, Cinema: 2.39:1, IMAX: 1.43:1. Create in highest resolution needed, export multiple ratios. Consider vertical-first for mobile-dominant audiences.

How do I crop to a different aspect ratio?

Center important subject, then crop to target ratio. Tools: Photoshop (Crop tool with ratio), online editors, video editors. Consider safe zones - areas visible across all crops. Loss of information at edges. Plan composition for multiple ratios if cross-platform.

What happens if I don't match platform aspect ratios?

Platform adds letterboxing (black bars): horizontal bars for portrait on landscape, vertical bars for landscape on portrait. Reduces effective viewing area. May crop automatically (Instagram). Professional content should match platform native ratios for maximum screen usage.

Should I shoot video in 16:9 or 9:16?

Consider primary platform. TikTok/Reels/Stories: 9:16 vertical. YouTube/TV: 16:9 horizontal. Multi-platform: shoot 1:1 (square) or 4:5, then crop for each. Or shoot 16:9, crop to 9:16 (loses sides). Vertical video dominates mobile consumption (80%+ of social media).

How do I maintain aspect ratio when resizing?

Lock aspect ratio in image editors. CSS: aspect-ratio property or padding-bottom hack. JavaScript: calculate proportionally (newHeight = newWidth / aspectRatio). Always scale both dimensions together. Prevents distortion/stretching. Use object-fit: cover/contain for different behaviors.

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