Calculate Exposure | Exif Viewer | Photo Dimensions | Photo Ratio | Image Diagonal
Calculate Width-to-Height Ratio of Photos
Calculator for the change of the photo size, when changing the ratio. Photos from a camera often have a fixed ratio of width and height. Sometimes, the photos are needed in another ratio and have to be cropped. Here, the new image size can be calculated.
Please enter the old resolution and the width-to-height ratio. For the values, the first value is usually interpreted as width, the second value as height. The resolution is often given in pixels; the ratio has no unit. The new resolution will be calculated.
Example: a photo with the dimensions 4592 x 3056 should fit into a frame of the size 24 x 18. So, before printing, it has to be cropped to 4075 x 3056. The frame size can be in in centimeters, or inches, or any other unit of length. This unit doesn't have to be entered, as it is canceled out in the ratio anyway.
The calculation is as follows: ratio 1 = old width divided by ratio width, ratio 2 = old height divided by ratio height. If ratio 1 > ratio 2, then new width = old height times ratio 1, new height equals old height. If ratio 1 < ratio 2, then new height = old width divided by ratio 1, new width equals old width.
The new resolution is always calculated so that one of the two values of the old resolution remains the same and the other is changed. If one of these two values is changed, the ratio of these two values also of course automatically changes. This results in some cropping, meaning a portion of the image is lost. In this example, it is a part of the width; this can be on the far left or right, or equally on the left and right. The latter is often done with automatic cropping. To change both values while maintaining the ratio, see the photo dimensions calculator.
German: Fotografische Belichtung berechnen, Exif-Daten auslesen, Bildformat, Bildverhältnis, Bilddiagonale
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