Get the right proportion scale for your painting easily. Click "resize" to see what the other value would be if the painting was scaled proportionally.
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:
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).
So,