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Aspect Ratio Calculator

Calculate height from width and ratio. For YouTube, images.

▶About this tool

This tool calculates height from width and aspect ratio in one click. Three features: 1) Enter width and ratio (16:9) for height, or height and ratio for width, 2) 16:9, 4:3, 1:1 presets, 3) Ideal for YouTube embed and image resize dimensions.

Tool interface

Usage

  1. Enter width and aspect ratio (16:9 etc.) for height
  2. Or enter height and ratio for width
  3. 16:9, 4:3, 1:1 presets available

When to use

YouTube embed sizing, image resize, responsive container height.

Examples

1920 × 16:9 → height 1080, 1080 × 16:9 → width 1920.

FAQ

What is 16:9 aspect ratio?

Width 16 to height 9. Standard for Full HD (1920×1080) and YouTube. Height = width ÷ (16/9).

How to calculate aspect ratio?

Height from width: height = width ÷ (width_ratio/height_ratio). E.g. 16:9, width 1920 → height = 1920 ÷ (16/9) = 1080.

What is 4:3 aspect ratio?

Traditional TV ratio. Width 1920 → height 1440. Taller than 16:9.

What is 1:1 aspect ratio?

Square. Used for Instagram feed, icons, thumbnails. Width equals height.

YouTube recommended aspect ratio?

16:9 standard. 1920×1080 or 1280×720. This tool calculates dimensions instantly.

How to get width from aspect ratio?

Width = height × (width_ratio/height_ratio). E.g. 16:9, height 1080 → width = 1080 × (16/9) = 1920.

How to maintain image aspect ratio?

Use object-fit: contain or aspect-ratio. This tool calculates dimensions first.

Aspect ratio vs resolution?

Aspect ratio = width:height (16:9). Resolution = pixels (1920×1080). Same ratio, different resolutions possible.

CSS aspect-ratio property?

aspect-ratio: 16/9 sets element ratio. Width auto-calculates height. This tool helps with the math.

Video aspect ratio types?

16:9 (YouTube), 4:3 (legacy), 1:1 (square), 9:16 (vertical). Use this tool to compute dimensions.

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