Aspect Ratio Canvas Calculator

Summary

Enter width or height to get the matching dimension for any aspect ratio. Choose from common presets or set a custom ratio.

How it works

1. Select a preset ratio (16:9, 4:3, 1:1, etc.) or enter a custom W:H ratio.
2. Type a width value and the height is calculated automatically.
3. Type a height value and the width is calculated automatically.
4. Switch between pixel, millimeter, and centimeter units.
5. The visual preview updates to show the proportional canvas shape.
6. Copy the result dimensions with one click.

Use cases

• Size a video canvas at 16:9 for YouTube or Vimeo.
• Set artboard dimensions for a presentation slide deck.
• Calculate A4 or Letter artboard sizes at any scale.
• Match an existing image aspect ratio when cropping or resizing.
• Design social media assets at platform-required proportions.
• Scale a logo canvas to match a product photo aspect ratio.

Frequently Asked Questions