3 mm Graph Paper — A4, Free Printable PDF
Not every school standardises on 5 mm. Some vocational programmes specify 3 mm for electrical diagrams where component symbols need a bit more room than a 2 mm grid allows but less waste than 5 mm.
Related grids
1/4 inch — Letter
Download free 1/4 inch square graph paper sized for US Letter paper. Prints at true scale for classroom math, coordinate plotting, and sketching.
1/4 inch — A4
Free 1/4 inch graph paper on A4. True-scale PDF for maths coursework, plotting, and design sketches.
1/4 inch — Legal
Printable 1/4 inch graph paper on Legal-size paper. Extra length for timelines, long number lines, and project layouts.
1/4 inch — A3
Large-format 1/4 inch graph paper on A3. Ideal for posters, group whiteboard substitutes, and big mapping exercises.
1/5 inch — Letter
Free 1/5 inch square grid on Letter paper. Finer spacing for detailed graphs and scaled drawings.