Sierpinski Triangle Coloring Pages

Print the Sierpinski triangle, also known as the Sierpinski gasket or sieve, at each of its first six steps. Every step removes the middle of each remaining triangle, so the outline holds 3, 9, 27, 81, 243 and finally 729 small triangles, the smallest still about 2.8 mm wide.

Two more pages complete the set. One places the first four stages next to each other; on the other, the holes carry the numbers 1 to 4, after the cut that made them, for coloring with a key. All eight pages are gathered in a workbook.

Part of the Sierpinski Fractals collection, Last updated on Tue, 03 Nov 2026 00:31:21 GMT.

Free Printables

Sierpinski Triangle, Step 1

The triangle after 1 cut: 3 small triangles around 1 hole. | zuzuzi.com

Sierpinski Triangle, Step 2

The triangle after 2 cuts: 9 small triangles around 4 holes. | zuzuzi.com

Sierpinski Triangle, Step 3

The triangle after 3 cuts: 27 small triangles around 13 holes. | zuzuzi.com

Sierpinski Triangle, Step 4

The triangle after 4 cuts: 81 small triangles around 40 holes. | zuzuzi.com

Sierpinski Triangle, Step 5

The triangle after 5 cuts: 243 small triangles around 121 holes. | zuzuzi.com

Sierpinski Triangle, Step 6

The triangle after 6 cuts: 729 small triangles around 364 holes. | zuzuzi.com

Sierpinski Triangle, Steps 0 to 3

Steps 0 to 3 of the triangle on one page, to watch each cut appear. | zuzuzi.com

Sierpinski Triangle, Color by Step

Holes numbered 1 to 4 by the step that opened them, with a color key. | zuzuzi.com

From One Cut to 364 Holes

Step 1 has a single hole in the middle; step 2 adds three more, step 3 nine more, and step 6 counts 364 holes in all. Young children enjoy the large shapes of the first steps, while the last ones make a long, calming coloring project.

Coloring by Step

On the color by step page, each hole carries a number: 1 for the large central hole, 2 for the three around it, 3 and 4 for the smaller ones. Choosing one color per number makes the repetition of the pattern stand out.

A Link With Pascal's Triangle

The same pattern appears when the odd numbers of Pascal's triangle are colored, a surprising meeting of arithmetic and geometry worth showing a class after these pages.