What Square Size Should Graph Paper Have? When to Use 1 mm, 5 mm, 7 mm and 1 cm Grids, and How Many Squares Fit on A4

Graph paper square sizes and what they suit

The square size of graph paper depends on what you want to draw and how finely. Whether you want to read lengths off the grid like a scale, or keep letters and diagrams neatly aligned, changes which size is right. Here is how the four most common sizes compare.

If in doubt, 5 mm is the most versatile size. Shop-bought grid notebooks and report pads are mostly 5 mm, and it works for writing, diagrams and graphs alike. Choose 1 mm only when you need to read a maths graph's scale finely, and 7 mm or 1 cm for children who need to write large; that makes it easy to decide.

How many squares fit on A4, B5 and A5?

The number of squares on one sheet is the paper size minus the margins, divided by the square size. On A4 (210 × 297 mm) with 10 mm margins all round, the usable area is 190 × 277 mm. With a 5 mm grid, that is 190 ÷ 5 = 38 squares across, and 277 ÷ 5 = 55.4, so 55 squares down.

With the Printable Graph & Lined Paper tool set to 10 mm margins and a 50 mm check ruler at the bottom, the square counts are as follows (portrait).

Reducing the margins to 5 mm increases a 5 mm grid on A4 to 40 across × 57 down. However, home printers have an area of about 3–5 mm from the edge of the paper that they cannot print, so margins smaller than 5 mm can lose the lines at the edges. If you want to draw axes to the edge for graph paper, leaving a little margin and printing a clear outer border gives a cleaner result.

What is the heavier line every 5 squares for?

Most graph paper has a slightly heavier line every 5 squares (or every 10). It is a divider for counting by eye: on a 5 mm grid the distance between heavy lines is exactly 25 mm, and on a 1 mm grid it is 5 mm.

• Drawing graphs: even with 1 square = 1, you can read 5, 10, 15… at a glance from the heavy lines
• Measuring lengths: just counting heavy lines gives a rough length without a ruler
• Laying out diagrams and tables: using the heavy lines as dividers makes it easy to keep margins and widths even
• Writing: if heavy lines distract you, writing is easier without them

In the Printable Graph & Lined Paper tool, you can choose heavy lines every 2, 4, 5 or 10 squares, or none. Heavy lines are drawn about 2.2 times as thick as the thin lines, so they stay clearly distinct when printed. A good split is every 5 squares for study notebooks, every 10 for technical drawing, and none for planner notes.

How dot grid differs

Dot grid paper has dots only where the grid lines would cross. With no lines, the page looks cleaner and what you write or draw stands out. How to make grid or dot grid templates for note apps such as GoodNotes is covered in how to make your own note app templates. The dots still let you draw straight lines and keep letter heights even, which is why dot grid is popular for bullet journals, planners and idea sketches.

A 5 mm dot grid gives 39 × 56 dots on A4 and 26 × 39 dots on A5. For a clean look in an A5 planner, 5 mm is a good guide; to fit in a lot, around 3.7 mm. Dots that are too faint can vanish when copied or scanned, so if you plan to share your notes, a darker grey is the safe choice.

Steps for printing your own graph paper

1. 1

   Choose the paper type and square size

   Choose “Graph paper” or “Dot grid”, then set the square size with a preset (1 mm, 5 mm, 7 mm, 1 cm) or the slider. It can be set in 0.5 mm steps.

2. 2

   Set the paper size, orientation and margins

   Choose from A4, B5, A5, B4, A3 and Letter, with margins of 5 mm or more. “X across × X down” is shown above the preview.

3. 3

   Set the line colour, weight and heavy-line interval

   To make your writing stand out, use thin grey or light blue lines; if you will photocopy it, make them a little thicker.

4. 4

   Print at 100% and check the ruler

   In the print dialog, set the scale to “100%” or “Actual size”, print, and hold a ruler against the 50 mm ruler at the bottom.

If the printed squares come out smaller than 5 mm, the print settings are scaling the page down automatically. The causes and fixes are covered in how to print graph paper at actual size. More specialised grids, such as triangular and hexagonal, can be made with the same tool. Using a grid for fuse bead or embroidery patterns is covered in how to make fuse bead and cross-stitch patterns.

FAQ

Is 5 mm or 1 cm graph paper better?

For a mix of writing, diagrams and graphs, 5 mm is easier to use, and shop-bought notebooks and report pads are mostly 5 mm. 1 cm suits arithmetic for younger children, and anything you want to draw large and clearly, such as floor plans or game boards.

How many squares does 5 mm graph paper have on A4?

With 10 mm margins all round, 38 across × 55 down. With 5 mm margins it rises to 40 across × 57 down, but home printers may cut off the lines at the edges.

How many squares apart are the heavy lines on graph paper?

Every 5 squares is most common, and some 1 mm graph paper uses different weights every 5 and every 10 squares. They are dividers for counting, so on a 5 mm grid the heavy lines are 25 mm apart.

When should I use dot grid instead of a line grid?

Line grids suit uses with lots of ruled lines, such as graphs, tables and technical drawing. Dot grids suit planners, diaries and sketches, where you want what you write to stand out.

When is 1 mm graph paper used?

For technical drawings and plans, precise graphs, and full-size drafts of patterns and craft work: anything where you want to read lengths to the millimetre. It is too fine for writing, so 5 mm suits notes better.