A0 vs JIS B0

Q: Which is bigger, A0 or JIS B0?

JIS B0 — 1030 × 1456 mm against 841 × 1189 mm, which is 50% more area.

	A0	JIS B0
Millimetres	841 × 1189	1030 × 1456
Inches	33.11 × 46.81	40.55 × 57.32
Centimetres	84.1 × 118.9	103 × 145.6
Aspect ratio	1:1.41	1:1.41
Area	9999.5 cm²	14996.8 cm²

Which is bigger

A0 and JIS B0 carry the same number and are not the same sheet. The Japanese B series is defined by area — JIS B0 is 1.5 square metres where A0 is 1 — so a JIS B sheet is half again the area of the A sheet of the same number, and about 22% longer on each edge. The number tells you where a sheet sits in its own series and nothing about which standard it belongs to.

JIS B0, by 50% in area. JIS B0 is 189 mm wider than A0. JIS B0 is 267 mm taller.

Printing one on the other

A A0 page fits inside JIS B0 whole — print it at 100% and you get a 94.5 mm border down each side and 133.5 mm top and bottom.

You want	Set the print scale to	Leaves
A0 artwork on JIS B0 paper	122.5%	0.1 × 0 mm margin
JIS B0 artwork on A0 paper	81.7%	0 × 0.2 mm margin

These are the numbers for the "custom scale" box in a print dialog. "Fit to page" computes the same thing, but knowing the figure tells you in advance whether the result will look deliberate or accidental.

Why the shapes matter

Both sheets have the same 1:1.41 proportions, so artwork scales between them without any cropping or extra margin — only the size changes.

Frequently asked questions

What is the difference between A0 and JIS B0?

A0 is 841 × 1189 mm and JIS B0 is 1030 × 1456 mm. JIS B0 is the larger of the two by 50% in area.

Can I print A0 on JIS B0?

Yes, at 100% — A0 is smaller on both edges, so it lands inside JIS B0 with a border all round.

Which is bigger, A0 or JIS B0?

JIS B0 — 1030 × 1456 mm against 841 × 1189 mm, which is 50% more area.

Related comparisons

A0 in full · JIS B0 in full · All size comparisons · All paper sizes