Resize & crop

Pixels to inches and cm, at any DPI

Convert pixels to inches or centimetres at 300, 240, 150 or any DPI, or go the other way from a print size to pixels. Type the numbers, or choose a photo to fill them in.

or drop files or a folder here, or paste

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How it works

How to convert pixels to inches

  1. Choose a photo, or type its width and height in pixels. Nothing is uploaded.
  2. Pick the DPI and units, or switch to the ratio and print sizes tabs.
  3. Read the print size and quality, then crop the photo to the shape of the print you want.

Standard photo print sizes in inches, cm and pixels

Pixels a print needs: 300 DPI looks sharp in the hand, 150 DPI is fine for posters seen from a step away.

SizeOther unitRatioPixels at 300 DPIPixels at 150 DPI
Wallet · 2.5 × 3.5 in6.4 × 8.9 cm5:7750 × 1050375 × 525
3.5 × 5 in8.9 × 12.7 cm7:101050 × 1500525 × 750
4 × 6 in10.2 × 15.2 cm2:31200 × 1800600 × 900
5 × 7 in12.7 × 17.8 cm5:71500 × 2100750 × 1050
6 × 8 in15.2 × 20.3 cm3:41800 × 2400900 × 1200
8 × 10 in20.3 × 25.4 cm4:52400 × 30001200 × 1500
Letter · 8.5 × 11 in21.6 × 27.9 cm17:222550 × 33001275 × 1650
8 × 12 in20.3 × 30.5 cm2:32400 × 36001200 × 1800
11 × 14 in27.9 × 35.6 cm11:143300 × 42001650 × 2100
12 × 18 in30.5 × 45.7 cm2:33600 × 54001800 × 2700
16 × 20 in40.6 × 50.8 cm4:54800 × 60002400 × 3000
20 × 30 in50.8 × 76.2 cm2:36000 × 90003000 × 4500
24 × 36 in61 × 91.4 cm2:37200 × 108003600 × 5400
9 × 13 cm3.5 × 5.1 in9:131063 × 1535531 × 768
10 × 15 cm3.9 × 5.9 in2:31181 × 1772591 × 886
13 × 18 cm5.1 × 7.1 in13:181535 × 2126768 × 1063
15 × 21 cm5.9 × 8.3 in5:71772 × 2480886 × 1240
20 × 20 cm7.9 × 7.9 in1:12362 × 23621181 × 1181
20 × 30 cm7.9 × 11.8 in2:32362 × 35431181 × 1772
30 × 30 cm11.8 × 11.8 in1:13543 × 35431772 × 1772
30 × 40 cm11.8 × 15.7 in3:43543 × 47241772 × 2362
30 × 45 cm11.8 × 17.7 in2:33543 × 53151772 × 2657
40 × 50 cm15.7 × 19.7 in4:54724 × 59062362 × 2953
40 × 60 cm15.7 × 23.6 in2:34724 × 70872362 × 3543
50 × 70 cm19.7 × 27.6 in5:75906 × 82682953 × 4134
60 × 90 cm23.6 × 35.4 in2:37087 × 106303543 × 5315
A6 · 10.5 × 14.8 cm4.1 × 5.8 in1:1.411240 × 1748620 × 874
A5 · 14.8 × 21 cm5.8 × 8.3 in1:1.421748 × 2480874 × 1240
A4 · 21 × 29.7 cm8.3 × 11.7 in1:1.412480 × 35081240 × 1754
A3 · 29.7 × 42 cm11.7 × 16.5 in1:1.413508 × 49611754 × 2480
A2 · 42 × 59.4 cm16.5 × 23.4 in1:1.414961 × 70162480 × 3508
A1 · 59.4 × 84.1 cm23.4 × 33.1 in1:1.427016 × 99333508 × 4967

Common aspect ratios: 16:9, 9:16, 4:3, 3:2, 1:1, 4:5

  • 16:9 widescreen video, YouTube, TV and laptop screens (1920 × 1080, 3840 × 2160)
  • 9:16 phone-tall: stories, reels, TikTok and Shorts (1080 × 1920)
  • 4:3 most phone photos (4032 × 3024) and older screens
  • 3:2 most camera photos, 4×6 in and 10×15 cm prints
  • 1:1 square posts and profile pictures (1080 × 1080)
  • 4:5 portrait Instagram posts (1080 × 1350) and 8×10 in prints
  • 21:9 ultrawide monitors and cinema

DPI and print size: pixels to inches and cm

Prints look sharp at 300 DPI when held in the hand; 150–200 DPI is fine for posters seen from a step away. The DPI number stored in a file does not change the picture, only the pixels matter.

Inches = pixels ÷ DPI. Centimetres = inches × 2.54. Pixels = inches × DPI.

Pixels to cm: Questions

How many pixels are in an inch or a centimetre?

It depends on the DPI: at 300 DPI an inch holds 300 pixels and a centimetre about 118. So pixels ÷ DPI = inches, and inches × 2.54 = centimetres. At 96 DPI (screens) an inch is 96 pixels.

How big can I print my photo?

Divide the pixels by the DPI. A 4032 × 3024 px phone photo prints at 13.4 × 10.1 in (34 × 26 cm) at 300 DPI, which looks sharp in the hand, and at about 27 × 20 in (68 × 51 cm) at 150 DPI, which is fine for a poster seen from a step away.

What DPI do I need to print a photo?

300 DPI is the usual target for prints you hold in your hand (10×15 cm, 5×7 in, A4). 200 DPI still looks good, and 150 DPI is enough for large posters you look at from a distance. The DPI number saved in a file does not change the picture; only the pixels count.

How do I calculate an aspect ratio?

Divide the width and the height by their greatest common divisor: 1920 × 1080 becomes 16:9, 1080 × 1350 becomes 4:5. To keep a ratio when resizing, new height = new width × height ÷ width. The calculator does both and also names the closest common ratio.

What are the standard photo print sizes?

In inches: 4×6, 5×7, 8×10, 8×12, 11×14, 16×20 and 20×30. In Europe: 10×15, 13×18, 15×21, 20×30, 30×40 and 40×60 cm, plus A4 and A3 paper. 4×6 in and 10×15 cm are the usual photo size; each size's pixels at 300 DPI are in the table.

Why does my photo need cropping for some print sizes?

Phone photos are 4:3 and most cameras 3:2, while 8×10 is 4:5 and A4 is about 1:1.41. When the shapes differ, part of the photo is cut off. The table shows how much, and the Crop button lets you choose which part to keep.

Are my photos uploaded anywhere?

No. FotoJock runs entirely in your browser: the files are read, converted and saved on your own phone or computer. Nothing is sent to a server, and it keeps working offline once the page is open.

Is it really free?

Yes, with no account, no watermark and no limit on the number of files. FotoJock is made by Foto Jocković, a photo shop in Belgrade.

All tools

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