Fold a Rectangle | Wrapping Paper
Fold a Rectangle
Calculate and draw the folding of a rectangle. Foldings can be done in length or width, the new dimensions with thickness, diagonal, perimeter and area will be calculated. The original rectangle and the rectangle resulting from the folding will be drawn at the same scale.
Please enter length and width of the original rectangle and the number of folding acts. The thickness doesn't have to be indicated. Fold length cuts the length in half for each act of folding, Fold width does the according thing for the width. Fold length and width contains the double amount of single foldings, so the area will be quartered respectively. The number of folding acts determines how often it will be folded. Here can also be a negative number, e.g. for -1 it will be doubled. At a square, length and width are equal.
Example: With a standard 80gsm A4 sheet of paper, you can fold approximately three times lengthwise and three times widthwise, alternating between the two. This makes a total of six folds. Enter the measurements given above and a 3 for the number of folds. The result is that the folded sheet is now 37.125 mm long, 26.25 mm wide, and 8.192 mm high. These are theoretical measurements; in practice, the fold will not be exact, and the more you fold, the more difficult it becomes and the more unsightly and crooked the result will be. It works a bit better if you cut instead of folding, as this avoids creases.
The formulas are:
New dimension = old dimension / 2number of single folding acts
New thickness = old thickness * 2number of single folding acts
Diagonal = √ length² + width²
Perimeter = 2 * ( length + width )
Area = length * width
The units are equal units of length, e.g. centimeters. For the area, it is this unit squared, e.g. square centimeters.
Last updated on 03/11/2026. Author: Jürgen Kummer
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