A0 Size: Dimensions in cm, mm and Inches

A0 is 841 × 1189 mm, which is 84.1 × 118.9 cm or 33.1 × 46.8 inches. It's the largest standard A size, with an area of exactly one square metre, and every other A size is made by halving it. Framed, an A0 print comes out at roughly 88 × 123 cm to 94 × 129 cm on the wall.

Below you'll find A0 in every unit, how it compares with the sizes it gets confused with, and what to know before you frame and hang something this big.

A0 dimensions in every unit

Unit	Width × height (portrait)
Millimetres	841 × 1189 mm
Centimetres	84.1 × 118.9 cm
Inches	33.1 × 46.8 in (33.11 × 46.81 to two decimals)
Area	1 m², exactly one square metre

That one square metre is the starting point for the whole A series. Its sides are in the ratio 1 to the square root of 2, which is why folding it in half gives a smaller sheet of exactly the same shape.

A0 compared with the other A sizes

Size	Millimetres	How many fit in an A0
A0	841 × 1189	-
A1	594 × 841	2
A2	420 × 594	4
A3	297 × 420	8
A4	210 × 297	16
A5	148 × 210	32

Larger sheets such as 2A0 (twice A0) exist, but they're rarely used outside specialist printing.

Sizes that look like A0 but aren't

Size	Centimetres	Difference from A0
80 x 120 cm	80 × 120	4.1 cm narrower, 1.1 cm taller
36 x 48 inches	91.4 × 121.9	7.3 cm wider, 3 cm taller
30 x 40 inches	76.2 × 101.6	7.9 cm narrower, 17.3 cm shorter
70 x 100 cm	70 × 100	14.1 cm narrower, 18.9 cm shorter

70 x 100 cm is the largest common poster size in Europe, and it's well short of A0. Our picture frame size chart covers the rest.

A0 in pixels, for printing

Resolution	A0 in pixels (portrait)
300 ppi	9933 × 14043 px
150 ppi (typical for large prints)	4967 × 7022 px
72 ppi (screen only)	2384 × 3370 px

Very few images reach 300 ppi at A0, and they don't need to: a print this size is seen from across a room, so 150 ppi or even a little less usually looks sharp. Our pixels to print size calculator will check a specific file.

How big an A0 print looks framed

Moulding width	Outside size of an A0 frame
Slim, 20 mm	About 88.1 × 122.9 cm
Medium, 35 mm	About 91.1 × 125.9 cm
Wide, 50 mm	About 94.1 × 128.9 cm

A framed A0 is close to the size of a small door panel. It's the kind of piece that holds a whole wall on its own: above a large sofa, in a double-height hallway, or as the focal point of an open-plan room. A few practical things to plan for:

• Check the route in. Make sure a frame this size will fit through doorways and up the stairs to where it's going.
• Use proper fixings. A large frame needs fixings rated for its weight and suited to your wall. Two fixings, spaced apart, keep it level. Our guide to how to hang a picture explains the options.
• Get a second pair of hands. Hanging an A0 frame is a two-person job.

Which frame for an A0 print?

The look you want	Frame	Mount border
Print fills the frame, no mount	A0 frame	None
A0 print with a mount	Made to measure frame	Any width you choose
A1 print with a deep mount, in an A0 frame	A0 frame	About 12.4 cm at the sides, 17.4 cm top and bottom

See it before you buy. On any of our A0 frames, tap Preview Your Own Artwork and upload a photo of your print to see it in the frame. At this size it's also worth taping a paper template to the wall first.

Common questions

How big is A0 in cm?

84.1 × 118.9 cm.

What is A0 size in inches?

33.1 × 46.8 inches (33.11 × 46.81 inches to two decimal places).

Is A0 the biggest paper size?

It's the largest standard A size. Larger sheets such as 2A0 and 4A0 exist but are rarely used.

How many A4 sheets fit in an A0?

Sixteen.

What size frame do I need for an A0 print?

An A0 frame if you want the print to fill it. For a mount around an A0 print, you'll need a made to measure frame.

What size is A0 in pixels?

9933 × 14043 pixels at 300 ppi, or 4967 × 7022 pixels at 150 ppi, which is usually enough for a print this size.

More size guides: A1 size, A2 size and the full picture frame size chart.

Browse our A0 picture frames, handmade to order by Guild Certified Framers.