How many pixels is a 18×24 print at 300 DPI?

A 18×24 inch print at 300 DPI requires 5,400 × 7,200 pixels (38.88 megapixels). If your print lab requires a 0.125" full-bleed trim margin on each side, export at 5,475 × 7,275 pixels.

What is 18×24 inches in centimeters and millimeters?

18×24 inches equals 45.7 × 61 cm (457 × 610 mm). The total surface area is 432 square inches (3.00 sq ft).

What aspect ratio is a 18×24 print?

A 18×24 print has a 3:4 aspect ratio (decimal 0.75). Other standard print sizes sharing the exact 3:4 ratio include 9×12", 12×16", 30×40", 36×48".

Can I print a 12 MP phone photo at 18×24?

A standard 12 MP smartphone photo (3024 × 4032 px) prints at 168 DPI on a 18×24" print. For crisp close-up detail, run your photo through our free browser 4× upscaler first.

3:4 Aspect Ratio · POSTER STANDARD

18×24" Print Size: Pixels, DPI & Wall Scale Guide

To print a crisp 18×24 inch (45.7 × 61 cm) piece at lab-standard 300 DPI, prepare an image of 5,400 × 7,200 pixels (38.88 MP). ArchitecturalA2/medium poster size (3:4 ratio) — fits smartphone shots cleanly.

18×24" Resolution Table by DPI & Viewing Distance

Print Density	Exact Pixels (18×24")	With 0.125" Bleed	Megapixels	Min Viewing Distance	Quality Grade
300 DPI	5,400 × 7,200 px	5,475 × 7,275 px	38.88 MP	0.9 ft (11")	Excellent (300+ PPI)
240 DPI	4,320 × 5,760 px	4,380 × 5,820 px	24.88 MP	1.2 ft (14")	Very good (240–299 PPI)
200 DPI	3,600 × 4,800 px	3,650 × 4,850 px	17.28 MP	1.4 ft (17")	Wall-ready / good at viewing distance (150–239 PPI)
150 DPI	2,700 × 3,600 px	2,738 × 3,638 px	9.72 MP	1.9 ft (23")	Wall-ready / good at viewing distance (150–239 PPI)
120 DPI	2,160 × 2,880 px	2,190 × 2,910 px	6.22 MP	2.4 ft (29")	Fair — large/distant viewing only (100–149 PPI)
100 DPI	1,800 × 2,400 px	1,825 × 2,425 px	4.32 MP	2.8 ft (34")	Fair — large/distant viewing only (100–149 PPI)

Wall Placement Rule

Home office feature piece, entryway focal point, or paired bedroom art.

Frame & Mat Pairing

18×24 gallery frame or stretched canvas.

Canvas Wrap Allowance

For a 0.75" wrap, export 20×26" (6000×7800 px). For a 1.5" gallery wrap, export 21.5×27.5".

Test Your Photo for a 18×24" Print

Check my photo at 18×24" →

Runs in your browser — your photos never leave your device. Pick a standard print size or drop any image to inspect its exact DPI at wall scale.

Quick sizes:

Width (inches)Height (inches)Target DPI

Canvas Wrap Border (per side)Trim Bleed (per side)

Required File Resolution (300 DPI)Aspect Ratio: 3:4

5,400 × 7,200 px

Megapixels38.88 MP

Metric Size45.7 × 61 cm

Total Cut Size18" × 24"

Min View Dist.0.9 ft (11")

18" × 24"3:4

With a 1.5" gallery canvas wrap + 0.25" bleed, prepare 6450×8250 px (21.5"×27.5").

Crop Photo to 18×24 →Upscale 4× to Fit →

Ready to Print

Where to print a 18×24 poster print

Some links are affiliate partnerships — we may earn a commission at no extra cost to you. How tracking works

ShutterflyHas standard photo sizes

Everyday photo prints, 4×6 to 24×36 enlargements, and tabletop frames.

Best for: Standard photo enlargements (4×6, 5×7, 8×10, 11×14, 16×20) and gift orders.

Choose 18×24 on their site after you open the link.

Choose 18×24 on their site →

Checked 2026-11-01

Easy Canvas Prints

Fast U.S. stretched photo canvases in standard & custom wall sizes.

Best for: Homeowners printing phone or camera photos on 0.75" or 1.5" gallery wrap.

Print this at 18×24 on Easy Canvas Prints →

Checked 2026-11-03

Society6

Artist-designed peel-and-stick wall murals, art prints, and gallery frames.

Best for: Room-scale wall murals, botanical/retro/kids themes, and independent artist prints.

Print this at 18×24 on Society6 →

Checked 2026-11-01

Ready to Print

Where to print a 18×24 poster print

Some links are affiliate partnerships — we may earn a commission at no extra cost to you. How tracking works

ShutterflyHas standard photo sizes

Everyday photo prints, 4×6 to 24×36 enlargements, and tabletop frames.

Best for: Standard photo enlargements (4×6, 5×7, 8×10, 11×14, 16×20) and gift orders.

Choose 18×24 on their site after you open the link.

Choose 18×24 on their site →

Checked 2026-11-01

Easy Canvas Prints

Fast U.S. stretched photo canvases in standard & custom wall sizes.

Best for: Homeowners printing phone or camera photos on 0.75" or 1.5" gallery wrap.

Print this at 18×24 on Easy Canvas Prints →

Checked 2026-11-03

Society6

Artist-designed peel-and-stick wall murals, art prints, and gallery frames.

Best for: Room-scale wall murals, botanical/retro/kids themes, and independent artist prints.

Print this at 18×24 on Society6 →

Checked 2026-11-01

18×24" Print Size FAQs

How many pixels is a 18×24 print at 300 DPI?: A 18×24 inch print at 300 DPI requires 5,400 × 7,200 pixels (38.88 megapixels). If your print lab requires a 0.125" full-bleed trim margin on each side, export at 5,475 × 7,275 pixels.
What is 18×24 inches in centimeters and millimeters?: 18×24 inches equals 45.7 × 61 cm (457 × 610 mm). The total surface area is 432 square inches (3.00 sq ft).
What aspect ratio is a 18×24 print?: A 18×24 print has a 3:4 aspect ratio (decimal 0.75). Other standard print sizes sharing the exact 3:4 ratio include 9×12", 12×16", 30×40", 36×48".
Can I print a 12 MP phone photo at 18×24?: A standard 12 MP smartphone photo (3024 × 4032 px) prints at 168 DPI on a 18×24" print. For crisp close-up detail, run your photo through our free browser 4× upscaler first.

18×24" Resolution Table by DPI & Viewing Distance

Wall Placement Rule

Frame & Mat Pairing

Canvas Wrap Allowance

Test Your Photo for a 18×24" Print

Where to print a 18×24 poster print

Where to print a 18×24 poster print

18×24" Print Size FAQs

Compare Other Standard Print Sizes