A3 Graph Paper
A3 (297 × 420 mm) is two A4 sheets joined along the long edge — a big metric surface for technical drawings, planning charts, and posters. Generate it with a 5 mm or 1 cm grid and print or download a vector PDF.
A3 graph paper dimensions
- A3 is 297 mm wide by 420 mm tall — double the area of A4.
- On a 5 mm grid that is roughly 56 squares across and 80 down.
- On a 1 cm grid that is roughly 28 squares across and 40 down.
What is it good for?
- Large technical drawings and planning charts.
- Classroom and presentation posters.
- Big four-quadrant plotting surfaces for math.
Printing A3
- Print on an A3-capable printer at 100% scale to keep the grid true.
- No A3 printer? Download the vector PDF and print it at a copy shop.
- Switch to landscape for wide charts and timelines.
Frequently asked questions
What size is A3 graph paper?
A3 is 297 by 420 millimetres — twice the area of an A4 sheet.
Can I print A3 at home?
Only on an A3-capable printer. Otherwise download the vector PDF and print it at a copy shop at full size.
What grid should I use on A3?
A 5 mm grid with a heavier line every centimetre is the standard metric ruling. You can change it in the generator.
Can I use landscape A3?
Yes. Switch orientation to Landscape for a 420 × 297 mm working area.