Art Proportion Scaler

Get the right proportion scale for your painting easily. Enter in the original size of your painting in the first two fields. Then enter in one field in the resized field (width or height). Click "resize" to see what the other value would be if the painting was scaled proportionally.

Original Size

Fill out both fields below.


Only fill out one of the fields below. If both fields are filled in - New Height will be cleared and calculated based on New Width.

Round decimal to...

Leave blank if you don't want decimals at all

What is the best viewing distance for an artwork?

Let's see which painting size you should order at Paolo Gallery, to get an optimal effect.

The human eye has a horizontal field of vision of 135 degrees and a vertical field of vision of just over 180 degrees. This affects the best viewing angle and, therefore, the minimum viewing distance at which a painting of a certain size can be seen as an artwork instead of "in details."

To calculate the optimum viewing distance range which fits the human eye's ideal viewing angle:

  • Measure the Diagonal of the painting from the bottom-left corner to the top-right corner,
  • Minimum Viewing Distance = Diagonal x 1.5
  • Maximum Viewing Distance = Diagonal x 2

This formula applies to prints, paintings, screens and so on...

For example, an image that is 20 by 30 inch (50 by 75 cm) has a Diagonal of 36 inches (90 cm).

  • Minimum Viewing Distance = 36” x 1.5 = 54” or 90 cm x 1.5 =135 cm
  • Maximum Viewing Distance = 36” x 2 = 72” or 90 cm x 2 =180 cm


  • The 20” x 30” (50 x 75 cm) paintng should be viewed from 54” to 72” (135cm to 180cm).
  • An 8” by 12” (20 x 30 cm) painting should be viewed from 21.5” to 29” (54 to 72 cm).
  • A 40” by 60” (100 x 150cm) painting should be viewed from 108” to 144” (270 to 360cm).