How to Divide a Square into Thirds – Origami Reference Fold

One of the most useful reference folds in origami is dividing a square into three equal parts. Although many simple models rely only on halves and quarters, numerous traditional and modern designs require precise thirds to position folds accurately.

This step-by-step diagram demonstrates a reliable method for creating exact thirds without using a ruler. Once the thirds are established, the same approach can be extended to create 3×3, 6×6, 9×9, and other grids based on multiples of three.

Results

3×3 origami grid created from a square divided into three equal parts.

What you'll learn

Divide a square into three equal parts.
Create precise reference folds.
Build a 3×3 grid (optional).
Extend the construction to larger grids such as 6×6 and 9×9.

Difficulty

Beginner

Requirements

One square sheet of paper.

Tips

Make sharp creases for maximum accuracy.
Complete steps 8–12 only if you need a full 3×3 reference grid.
The same reference folds can be reused for larger grids based on multiples of three.

Origami Diagram Archive

Divide a Square into Thirds