Resize Image to 18×24 Inches
18×24 inches is a standard poster size. This page sizes your image for it at 300 DPI (5400×7200 pixels), cropping to the poster’s 3:4 shape. Everything runs in your browser — nothing is uploaded. Need a smaller file instead? Compress or convert.
Drag the preview to choose which part of the image is kept. The same framing is used for every image in the batch.
Why choose 18×24 inch?
18×24 inch (457.2×609.6 mm, 45.72×60.96 cm) is a portrait print size used for large prints, posters and documents. At 300 DPI it needs 5400×7200 pixels.
5400×7200 px at 300 DPI
The pixel size is worked out for you, and the file is saved with 300 DPI so it prints at exactly 18×24 inch.
Where it is used
18×24 inch is a common size for large prints, posters and documents. Check the requirements of the form or printer you are sending it to.
Larger than A4
This size is larger than an A4 page, so print it on bigger paper or at a print shop.
3:4 portrait shape
The portrait 3:4 proportion decides the framing. Drag the preview so the subject sits where the rules expect it.
About 5.9 MB–11.9 MB as JPG
At 300 DPI a 18×24 inch photo is usually 5.9 MB–11.9 MB. If a form limits the file size, pair it with the compressor.
Same size, other units
18×24 inch equals 457.2×609.6 mm or 45.72×60.96 cm. Enter whichever unit your instructions use — the result is identical.
18×24 inch at a glance
| Size | 18×24 inch = 457.2×609.6 mm, 45.72×60.96 cm |
|---|---|
| Pixels at 300 DPI (print) | 5400×7200 |
| Pixels at 600 DPI (high quality) | 10800×14400 |
| Pixels at 200 DPI | 3600×4800 |
| Pixels at 150 DPI | 2700×3600 |
| Aspect ratio | portrait 3:4 |
| Copies per A4 sheet | Larger than A4 |
| Copies per US Letter sheet | — |
| Copies per 4×6 in photo paper | — |
| Typical JPG at 300 DPI | 5.9 MB–11.9 MB |
Resize a photo to 18×24 inch in 3 steps
- Add your photo — a clear, well-lit original works best.
- The size is already set to 18×24 inch at 300 DPI. Drag and zoom the preview to frame the face or subject.
- Click Resize and download. Print it at 100% (“actual size”) so it comes out at 18×24 inch.
New to image resizing? Read the full resizing guide.
Square sizes
Same width and height — profile photos, icons, product shots:
Landscape sizes
Wider than tall — screens, banners, covers and thumbnails:
Portrait sizes
Taller than wide — passport photos, forms and phone screens:
Change the aspect ratio
Paper, print & photo sizes
Paper and photo sizes in mm, cm and inches, plus DPI tools:
Resize for a platform
Ready-made sizes for social profiles and posts:
Online shop sizes
Product photos, banners and logos for Etsy, eBay and Shopify:
Resize tools
Batch resizing, DPI and crop tools:
Preparing an 18×24 poster
Pixels needed. At 300 DPI an 18×24 inch print needs 5400×7200 pixels. Posters are viewed from a distance, so 150 DPI (2700×3600) also looks good and is easier to reach from a phone photo.
A 3:4 shape. 18×24 is 3:4, the same shape as most phone photos, so very little is cropped from a vertical shot.
Check with your printer. Print shops may want a bleed margin; ask before ordering and add it if needed.
Other print sizes
More poster and print sizes:
Frequently asked questions
How many pixels is an 18×24 inch poster?
5400×7200 pixels at 300 DPI, or 2700×3600 at 150 DPI, which is usually enough for a poster seen from a distance.
How many photos of 18×24 inch fit on an A4 page?
None — 18×24 inch is larger than an A4 sheet, so it needs bigger paper.
What DPI should a 18×24 inch photo be?
300 DPI is the standard for photo prints and gives 5400×7200 pixels. Some offices accept 200 DPI (3600×4800); 600 DPI (10800×14400) is only needed for very high-quality printing.
What is 18×24 inch in other units?
18×24 inch is 457.2×609.6 mm, 45.72×60.96 cm.
Why does my 18×24 inch print come out the wrong size?
Most printers scale images to “fit page” by default. Choose “actual size” or 100% in the print dialog, and the photo will print at exactly 18×24 inch.
How large is a 18×24 inch photo file?
Usually 5.9 MB–11.9 MB as a JPG at 300 DPI. If an online form allows less, reduce it with the compressor — the print size stays the same.
Are my images uploaded?
No. Resizing happens entirely in your browser. Nothing is transmitted or stored, and you can disconnect from the internet after the page loads and it still works.
Social media sizes
Facebook, Instagram, LinkedIn, TikTok, Discord, Pinterest and more: