Printable Graph Paper

1/8 Inch Graph Paper

Eight squares to the inch (3.175 mm) with a heavier line every eight, so the inches stay readable.

8.5 × 11.0 in · 215.9 × 279.4 mm
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What 1/8 Inch Graph Paper looks like

  1. The finished sheet

    1/8 Inch Graph Paper on US Letter, exactly as it prints.

    1/8 Inch Graph Paper on US Letter, printable example sheet

The fractional-inch grid

One eighth of an inch is the fine ruling on American drafting and design pads, chosen for the same reason 2 mm is chosen in metric countries: fine enough to plot on, coarse enough to see.

Because eight is a power of two, halving works cleanly all the way down. A quarter inch is two squares, a half inch four, an inch eight — which matters when you are working in fractional inches rather than decimals.

Every sheet here is free, adjustable and prints at exact scale.

Questions

Why is 1/8 inch common on drafting pads?

It divides an inch into eight, so quarters, halves and eighths all land exactly on grid lines. That suits fractional-inch dimensions, which is how most US mechanical work is specified.

How does it compare to 10 squares per inch?

Ten to the inch is slightly finer and decimal, which suits calculated values. Eight to the inch suits fractional measurements. Pick by which numbers you are working in.