Toolman

ARCH A vs Photo 8×12

ARCH APhoto 8×12
Millimetres228.6 × 304.8203.2 × 304.8
Inches9 × 128 × 12
Centimetres22.9 × 30.520.3 × 30.5
Aspect ratio1:1.331:1.5
Area696.8 cm²619.4 cm²

Which is bigger

ARCH A, by 12.5% in area. ARCH A is 25.4 mm wider than Photo 8×12. Both are exactly 304.8 mm tall.

Printing one on the other

A Photo 8×12 page fits inside ARCH A whole — print it at 100% and you get a 12.7 mm border down each side and 0 mm top and bottom.

You wantSet the print scale toLeaves
ARCH A artwork on Photo 8×12 paper88.9%0 × 33.9 mm margin
Photo 8×12 artwork on ARCH A paper100%25.4 × 0 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

The proportions differ: ARCH A is 1:1.33 and Photo 8×12 is 1:1.5. That difference is why a layout moved between them never quite lines up — scale it to fit one edge and the other is left with 33.9 mm of unwanted margin.

Frequently asked questions

What is the difference between ARCH A and Photo 8×12?

ARCH A is 228.6 × 304.8 mm and Photo 8×12 is 203.2 × 304.8 mm. ARCH A is the larger of the two by 12.5% in area.

Can I print ARCH A on Photo 8×12?

Not at full size. Scale it to 88.9% and it fits inside Photo 8×12 with 0 × 33.9 mm to spare.

Which is bigger, ARCH A or Photo 8×12?

ARCH A — 228.6 × 304.8 mm against 203.2 × 304.8 mm, which is 12.5% more area.

ARCH A in full · Photo 8×12 in full · All size comparisons · All paper sizes