A1 Paper Size in mm and Inches
A1 = 594 x 841 mm (23.4 x 33.1 in) under ISO 216, eight times the area of A4.
Open the interactive Standards & Sizes tool →Key facts
| Millimeters | 594 x 841 mm |
|---|---|
| Inches | 23.4 x 33.1 in |
| Standard | ISO 216, A-series |
| Typical use | Indoor posters, technical drawings |
Frequently asked questions
What size is A1 in cm?
A1 is 59.4 x 84.1 cm (594 x 841 mm), or 23.4 x 33.1 inches.
How big is A1 compared to A0?
A1 (594 x 841 mm) is exactly half of A0 (841 x 1189 mm).
Related pages
A1 Paper Size is part of Standards & Sizes on GOAT Lab — a free reference you can use without signing up, and it works offline. Open the tool above for any custom value.
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