Isometric Graph Paper PDF — Free Printable Triangular 3D Grid

Printable Isometric Graph Paper

Isometric paper replaces the square grid with a triangular lattice of vertical lines and 30° diagonals. That three-axis structure lets you draw convincing 3D objects — boxes, buildings, mechanical parts and game tiles — with consistent depth and no perspective distortion. Download the ready-made sheet or tune the triangle size yourself.

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Isometric Paper specifications
Paper size	A4 (210 × 297 mm)
Orientation	Portrait
Spacing	6 mm
Paper type	Isometric
Margin	small (8 mm)
Line color	Light gray
Line thickness	Thin
File type	PDF (vector) · PNG

Choose a size

US / Imperial

ISO A Series

ISO B Series

ISO C Series

How the 30° grid works

Three line families — vertical, up-30° and down-30° — meet to form a field of equilateral triangles. Edges that run “into the page” follow the 30° diagonals while heights stay vertical, so a cube drawn on isometric paper keeps equal-length sides and parallel edges. It is the same projection used in technical illustration and classic video-game art.

For makers and designers

Architects and engineers use isometric paper for quick 3D concept sketches; tabletop and pixel-game designers use it for tiles and level layouts; students use it for technical-drawing coursework. The triangular rhythm also makes neat work of hex-adjacent patterns and repeating motifs.

Set your triangle size

The editor controls the line spacing (and therefore triangle size), colour, thickness and margins, plus orientation and paper size. Smaller spacing gives finer detail; larger spacing is easier for bold sketches. Export a multi-page PDF for a whole drawing pad.

Frequently asked questions

What angle is isometric graph paper?

The diagonal lines run at 30° from the horizontal, combined with vertical lines, producing a grid of equilateral triangles — the basis of isometric projection.

What is isometric paper used for?

Drawing 3D objects without perspective distortion: technical sketches, architecture, mechanical parts, CAD concepts, and isometric game or pixel art.

How do I print isometric paper to scale?

For a true-to-size grid, print at 100% scale (turn off "Fit to page" or "Shrink oversized pages"). The PDF is built at exact A4, Letter or A5 dimensions, so 5 mm really measures 5 mm on paper.

Is this triangular paper the same as isometric?

This template uses the isometric arrangement (vertical + 30° diagonals). True “triangular” paper omits verticals and uses 60° lines instead; pick the spacing that suits your drawing in the editor.