Aspect Ratio Calculator

Use this ratio calculator to check the dimensions when resizing images.

Ratio Width1

Ratio Height1

=

W2

H2

Your aspect ratio is: ? : ?
Aspect Ratio Example

Instructions

  1. Enter the values for the original width (Ratio Width1) & original height (Ratio Height1) on the left.
  2. Enter either a new width (W2) or new height (H2) on the right to calculate the remaining value.
  3. Change any of the values at any time, or reset them to the starting values.

Formula

Say you have a photo that is 600 x 200 pixels, but your blog only has space for a photo 400 pixels wide. To find the new height of your photo—while preserving the aspect ratio—you would need to do the following calculation:

(original height / original width) x new width = new height
(200 / 600) x 200 = 67