Graph Paper Sizes Explained (5mm, 10mm, 1/4 Inch, and More)
Not all graph paper is the same. Learn the most common grid sizes for graph paper printable, how to pick the right grid paper for math or engineering, and printing tips.
Graph paper (also called grid paper) is a coordinate system you can write on. Whether you need graph paper printable for school or grid paper for engineering sketches, choosing the right size makes math cleaner and diagrams more accurate. Here’s a quick guide to common graph paper and grid paper sizes.
The most common grid sizes
| Grid size | Metric / Imperial | Typical uses |
|---|---|---|
| 5mm | metric | school math, general plotting |
| 10mm | metric | big charts, younger students |
| 1/4 inch | 6.35mm | US math, engineering sketches |
| 1/5 inch | 5.08mm | dense plotting, finer graphs |
If you want a ready-to-print US option:
- 1/4 inch: 1/4 inch graph paper
How to choose
School math
5mm or 1/4 inch are common. Go bigger (10mm) if the student needs more room.
Engineering sketches
1/4 inch is a practical baseline on Letter paper. It balances precision and readability.
Data visualization
Smaller grids help with detail, but don’t overdo it—if you can’t read the graph, precision doesn’t matter.
Printing accuracy matters
Grid paper and graph paper are only useful if the squares are the size you expect. Print at Actual Size / 100% and ensure the document paper size matches your sheet stock (A4 vs Letter).
Where to find graph paper printable
Need a graph paper printable PDF? Browse our graph paper templates for 1/4 inch, 5mm, and other grid sizes—all free to download and print.