DPI and print size calculator – pixels to print size and back

Enter your image size in pixels and a DPI to get the print size in inches and centimeters, or enter a print size to see how many pixels you need.

How the DPI calculator works

Print size comes down to two numbers: how many pixels the file has, and how many of those pixels you pack into each inch of paper. Divide pixels by DPI and you get inches. Multiply inches by 2.54 and you get centimeters. Run it backwards, inches times DPI, and you get the pixel count a print needs.

Print width in inches = pixel width ÷ DPI Print width in cm = print width in inches × 2.54 Pixels needed = print width in inches × DPI

The calculator does this in both directions and shows the result at 300, 150 and 72 DPI next to each other, each with a quality label. One look tells you whether a file makes a sharp 8 x 10, a decent poster, or only a screen image.

What the quality labels mean

At 300 DPI you get print quality for anything a person holds in their hands: art prints, planners, greeting cards, stickers, photos. At reading distance the eye can’t pick out single pixels at that density, so small text and thin lines stay crisp.

At 150 DPI you get large-format quality. Posters and canvas wall art that people look at from a few feet away print fine here, and so does most apparel. Printful asks for at least 150 DPI on most of its products and recommends 300 for paper products and designs with fine detail or text.

At 72 DPI the label reads screen only. A file printed at that density looks soft and blocky up close. The 72 column is useful for one thing: checking how large an image will appear in a web mockup or a listing photo.

Worked example: one file, three print sizes

You’ve finished a botanical illustration at 3600 x 5400 pixels and want to sell it on Etsy as a printable. Type 3600 into width and 5400 into height.

At 300 DPI the calculator returns 12 x 18 inches (30.48 x 45.72 cm), labeled high quality. 3600 ÷ 300 = 12 and 5400 ÷ 300 = 18. Every smaller size with the same 2:3 ratio also prints sharp from this file, including 4 x 6 and 8 x 12.

At 150 DPI the same file covers 24 x 36 inches (60.96 x 91.44 cm), labeled poster quality. Hung on a wall and seen from across a room, it holds up.

At 72 DPI it would stretch to 50 x 75 inches, labeled screen only. Nobody should print it at that size.

That gives you two numbers for the listing: sharp up to 12 x 18 in, poster quality up to 24 x 36 in.

Now switch the tool to print size mode. A buyer in Germany asks for A4 (21 x 29.7 cm). At 300 DPI the calculator returns 2480 x 3508 pixels. Your file has enough pixels, but A4 has a ratio of about 1:1.41 while your art is 2:3, which is taller and narrower.

Fit the width and the art runs past the page; fit the height and you get white bands down the sides. The calculator gives you the pixel target, and you still decide whether to crop, pad, or make a separate A4 version.

Pixels you need for common print sizes

Print size	Centimeters	Pixels at 300 DPI	Pixels at 150 DPI
4 x 6 in	10.16 x 15.24	1200 x 1800	600 x 900
5 x 7 in	12.7 x 17.78	1500 x 2100	750 x 1050
8 x 10 in	20.32 x 25.4	2400 x 3000	1200 x 1500
Letter, 8.5 x 11 in	21.59 x 27.94	2550 x 3300	1275 x 1650
A4, 8.27 x 11.69 in	21 x 29.7	2480 x 3508	1240 x 1754
11 x 14 in	27.94 x 35.56	3300 x 4200	1650 x 2100
12 x 18 in	30.48 x 45.72	3600 x 5400	1800 x 2700
16 x 20 in	40.64 x 50.8	4800 x 6000	2400 x 3000
18 x 24 in	45.72 x 60.96	5400 x 7200	2700 x 3600
24 x 36 in	60.96 x 91.44	7200 x 10800	3600 x 5400

Sizing sticker sheets for print then cut

If you sell sticker sheets for Cricut Print Then Cut, the design has to fit inside the machine’s cuttable area, which is smaller than the paper because the sensor marks print around the edges.

Cricut lists the largest design on Letter paper as 7.44 x 9.94 inches and on A4 as 7.2 x 10.62 inches.

Put those numbers in print size mode at 300 DPI and you get 2232 x 2982 pixels for Letter and 2160 x 3186 pixels for A4. Cricut also notes the cuttable area isn’t a full rectangle, so a design that uses the full height may not get the full width.

Leave a small margin. Silhouette Studio places its own registration marks, so check its page setup before you size a sheet for Silhouette users.

Etsy’s 20MB limit and very large prints

Etsy lets you attach up to five files to a digital listing, with a 20MB cap on each one.

That cap gets tight at poster sizes. A 24 x 36 file at 300 DPI is 7200 x 10800 pixels, almost 78 million of them, and a detailed PNG at that size often goes past 20MB. You have a few ways out.

Save the largest size as a high-quality JPEG. Deliver it at 150 DPI, which matches what print shops accept for posters. Or ship one file per aspect ratio (2:3, 3:4, 4:5, 11 x 14 and ISO A) and tell buyers to print at any size inside that ratio. Run each file through the calculator first so the listing states the real maximum size for every ratio.

Raising the DPI number won’t add detail

Every image file carries a DPI tag, and it’s only a label. A 1200 x 1800 pixel photo tagged 72 DPI and the same photo tagged 300 DPI hold exactly the same pixels.

What changes is the default print size: the 72 tag tells print dialogs to make it 16.7 x 25 inches, the 300 tag makes it 4 x 6. That’s why you should still set the tag to 300 on a printable. Buyers who print straight from Word or a photo app get the right size without touching any settings.

Pixel count is what limits print quality. If a file is too small, upscaling software can invent extra pixels. AI upscalers do a fair job on flat illustrations with clean edges and a weaker one on photos with texture. Zoom to 100 percent and inspect the result before you list it.

Frequently asked questions

How many pixels is 8 x 10 at 300 DPI?

2400 x 3000 pixels. Multiply each side in inches by 300. At 150 DPI you need 1200 x 1500.

How do I convert pixels to inches at 300 DPI?

Divide the pixel count by 300. A 3000 pixel wide image prints 10 inches wide at 300 DPI. Multiply by 2.54 for centimeters, which gives 25.4 cm.

Is 150 DPI good enough for printing?

For posters and t-shirts, usually yes. For anything held close, like cards, planners or stickers, aim for 300. Printful recommends a 150 DPI minimum on most products and 300 for paper products and fine detail.

How big can I print a 1080 x 1080 pixel image?

3.6 x 3.6 inches (9.14 cm) at 300 DPI, or 7.2 x 7.2 inches (18.29 cm) at 150 DPI. Phone screenshots and social media images rarely make good prints beyond that.

What is the difference between DPI and PPI?

PPI, pixels per inch, describes the image file. DPI, dots per inch, describes how many ink dots a printer lays down. Most design apps and print shops use DPI for both, and this calculator follows that habit. The math is the same either way.

Does DPI matter for digital downloads?

Yes, because buyers print them. The pixel count sets the largest size that stays sharp, and the DPI tag sets the default size when they hit print. Export printables at 300 DPI with enough pixels for the largest size you advertise.

More calculators for printable and cutting projects are in the craft tools section.

Cricut is a trademark of Cricut, Inc. and Silhouette is a trademark of Silhouette America, Inc. This site is not affiliated with either company. The names appear only to describe file compatibility.