What is 12 × 18 at 300 PPI?

12 × 18 in portrait orientation is 3600 × 5400 pixels at 300 PPI. Landscape uses the same two values in reverse order.

What aspect ratio is 12 × 18?

12 × 18 uses a 2:3 aspect ratio. An image with a different ratio must be cropped, fitted with borders or placed inside the page.

Does the 12 × 18 pixel size include bleed?

No. The table uses final trim dimensions. Add the exact bleed required by the printer to both sides before calculating the full artwork canvas.

Will a 3:2 camera photo crop at 12 × 18?

Normally no ratio crop is needed because 12 × 18 simplifies to 2:3, matching a 3:2 image after orientation is aligned. A print lab may still apply a small production crop for edge-to-edge output.

Photo size reference

12×18 Photo Size: Pixels, Resolution and Ratio

12 × 18 photo measures 304.8 × 457.2 mm. Its pixel dimensions change with PPI; the physical trim size does not.

Quick answer

A 12 × 18 inch print measures 304.8 × 457.2 mm and needs 3600 × 5400 pixels at 300 PPI. Its 2:3 aspect ratio matches common 3:2 camera images after orientation is matched.

300 PPI: 3600 × 5400 px · 19.44 megapixels

Pixel table

12 × 18 pixels by PPI

Portrait values are rounded to the nearest whole pixel after converting the native physical dimensions.

PPI	Width	Height	Use context
72	864 px	1296 px	Layout or screen reference
96	1152 px	1728 px	Layout or screen reference
150	1800 px	2700 px	Print / distance dependent
240	2880 px	4320 px	Print / distance dependent
300	3600 px	5400 px	Detailed print target
600	7200 px	10800 px	Detailed print target

Aspect fit

A direct fit for 3:2 camera images

A landscape 3:2 image fills an 18 × 12 print without ratio crop. Portrait uses the same dimensions in the opposite orientation.

Preview your framing →

Large-print range

Resolution changes the file requirement

A 12 × 18 needs 1800 × 2700 px at 150 PPI, 2880 × 4320 px at 240 PPI or 3600 × 5400 px at 300 PPI.

Check your large-print file →

Related format

The same shape as a 4 × 6 photo

Both sizes use a 2:3 ratio. At the same PPI, 12 × 18 needs three times as many pixels along each edge as 4 × 6.

Compare 4 × 6 →

Change the resolution

Calculate 12 × 18 at any PPI.

Interactive calculator

pixels = millimetres ÷ 25.4 × PPI

Paper preset → pixel dimensions

Print preset

Target PPI

PPI

Quick targets

Calculated resultsUpdates as you change the inputs

12 × 18 pixel dimensionsPrimary result

3600 × 5400 px

Trim sizeResult

304.8 × 457.2 mm

Trim size in inchesResult

12 × 18 in

12 × 18 at common targets

Target	Width	Height
150 PPI	1800 px	2700 px
240 PPI	2880 px	4320 px
300 PPI	3600 px	5400 px

Print setup

Trim first. Add production values second.

12 × 18 identifies the final physical format. Bleed expands the artwork beyond that edge; a safe margin moves important content inward. Those extra values depend on the print provider.

Calculate bleed and safe area →

Check before you print

Use the image, not a guess.

Run the source pixels against the exact size you plan to order.

Check an image →