Pixels to Inches & DPI Calculator

Pixels to inches or centimetres at any DPI, the pixels a print needs, the DPI a picture prints at, and your screen's real pixel density.

It prints

3.33 × 5 in

1000 × 1500 pixels at 300 dpi. In centimetres: 8.47 × 12.7 cm.

At	It prints
150 dpi	6.67 × 10 in
200 dpi	5 × 7.5 in
300 dpi	3.33 × 5 in

1 inch = 2.54 cm exactly. What a print needs: Printivity and Richard Photo Lab; a screen's inch: W3C CSS Values 4. Checked 27 September 2026.

Quick answer: To turn pixels into inches, divide by the DPI (dots per inch): 1500 pixels at 300 DPI is 5 inches. For centimetres, multiply the inches by 2.54. A Pinterest pin of 1000 × 1500 pixels prints 3.33 × 5 inches at 300 DPI. Print labs call 300 the standard. On a screen there is no fixed answer: a web page counts 96 pixels to an inch, and your screen's real density is usually different. Use the calculator above for any size, either way round.

How to use it

Print size: type a picture's width and height in pixels and the DPI. You get the size it prints, in inches or centimetres, and what it would be at 150, 200 and 300 DPI.
Pixels: type the print size you want and the DPI. You get the pixels the picture needs.
DPI: type the picture's pixels and the print size. You get the DPI it will print at, with what two print labs say about that number.
Screen PPI: type a screen's pixels and its size across the diagonal, or tap "Use this screen's pixels". You get how many real pixels it packs into an inch.

Switch between inches and centimetres at the top; what you typed is converted with it.

The pixels a print needs

Print	At 300 DPI	At 150 DPI
4 × 6 in	1200 × 1800 px	600 × 900 px
5 × 7 in	1500 × 2100 px	750 × 1050 px
8 × 10 in	2400 × 3000 px	1200 × 1500 px
8.5 × 11 in (US Letter)	2550 × 3300 px	1275 × 1650 px
11 × 14 in	3300 × 4200 px	1650 × 2100 px
10 × 15 cm	1181 × 1772 px	591 × 886 px
13 × 18 cm	1535 × 2126 px	768 × 1063 px
A4 (21 × 29.7 cm)	2480 × 3508 px	1240 × 1754 px

How good is my DPI? Two print labs, in their own words

Both agree on 300. They disagree about going lower, so here are both:

Printivity: "For print, documents with a 300 PPI resolution are ideal." And: "Designing with a printer resolution lower than 300 PPI creates blurry images and excessive pixellation."
Richard Photo Lab: "The usual print resolution is 300 DPI (dots per inch)." And, for big prints: "You can view large prints like banners and posters from far away. Resolutions of 150 to 300 DPI are usually okay."

So a small print you hold in your hand wants 300. A poster across the room can go lower. The DPI answer above quotes both labs against your number.

What your pictures print at

Picture	Pixels	At 300 DPI
A Pinterest pin	1000 × 1500	3.33 × 5 in
A square social post	1080 × 1080	3.6 × 3.6 in
A full HD screenshot	1920 × 1080	6.4 × 3.6 in
A 12-megapixel phone photo	4032 × 3024	13.44 × 10.08 in

A picture made for a screen is small on paper. To check a pin's shape and size before you post it, use the Pinterest image size checker. For free vision board pictures sized to print, see the vision board pictures.

Why a screen's "96 DPI" is not real

Web pages are laid out in CSS pixels, and the W3C fixes them to the inch: "1in = 2.54cm = 96px". It also says what that costs: "the physical units might not match their physical measurements". A browser maps CSS pixels to your screen's own pixels by its zoom and the device's pixel ratio, not by a ruler. That is why an "inch" on a web page is rarely an inch on the glass. A screen's real density is its pixels across the diagonal divided by the diagonal: a 27-inch 2560 × 1440 monitor is about 109 PPI, and phones are several times that.

FAQ

How many pixels are in an inch?

As many as the DPI says. At 300 DPI, 300 pixels make an inch of print; at 150 DPI, 150 do. A picture has no inches of its own until you choose how densely to print it. On a web page the answer is always 96 CSS pixels, by the W3C's definition.

What is the difference between DPI and PPI?

PPI is pixels per inch in the picture. DPI is dots per inch from the printer. Printers use several ink dots to make one pixel, but for sizing a picture the two numbers are used the same way, and this calculator treats them as one.

How do I convert pixels to centimetres?

Divide the pixels by the DPI to get inches, then multiply by 2.54. 1500 pixels at 300 DPI is 5 inches, which is 12.7 cm. Or switch the calculator to cm.

Can I make a small picture print bigger?

Only by printing it at a lower DPI, so each pixel covers more paper. Stretching the picture in an editor adds pixels, but it cannot add detail that was not there.

Is 72 DPI for the web?

Not in any way that matters. A web page shows a picture by its pixels, and the number written in the file's DPI field does not change how big it looks on screen. It matters only when the picture is printed.