Making a Square from Rectangular Paper

A lot of origami, kirigami, and other paper crafts begin with a square. Learn how to turn any rectangular piece of paper such as A4 or US Letter size paper into a perfect square with just a single fold and cut.
Making a square from rectangular paper


  • Any rectangular paper (e.g. A4 size or US Letter size)
  • Scissors

Safety Tips

  • Young kids should use child-safe scissors.


Step 1 Making a Paper Square 1. Position a rectangular piece of paper vertically on a flat surface.
Step 2 Making a Paper Square 2. Fold one top corner down to meet the opposite edge, forming a triangle.
Step 3 Making a Paper Square 3. Cut the excess paper below the triangle.
Step 4 Making a Paper Square 4. Unfold the triangle to reveal a perfect square.