basic

Aspect Ratio Calculator

Resize one dimension while keeping the original aspect ratio.

Compute the matching height for a chosen width (or width for a chosen height) so the new size keeps the original aspect ratio.

Nadia Almasri By Nadia Almasri
Published Last reviewed 1 min read

Inputs

Results

Enter values and click Calculate to see results.
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How to use this calculator

  1. Fill in the inputs above using the units you already have.
  2. Values update automatically as you type — no submit button needed.
  3. Hover any result row for the underlying formula and intermediate values.

Formula

new_height = new_width × original_height / original_width.

In depth

Compute the matching height for a chosen width (or width for a chosen height) so the new size keeps the original aspect ratio.