How many centimetres a photo prints at 300 DPI, or any DPI you enter
Processed in your browser. Nothing is uploaded. Updated on 25 Oct 2026.A pixel has no size of its own: it becomes a length only when the picture is printed at a chosen number of dots per inch. At 300 DPI, 1,000 pixels print 8.47 cm long, because 1,000 divided by 300 is 3.33 inches and an inch is 2.54 cm.
Print size from pixels is already chosen under Work out, with the size shown in cm.
Type the Width in pixels and Height in pixels of your picture.
Set DPI (dots per inch) to the figure your printer or form gives; 300 is the usual one for photos.
Read the size in cm at the top, with mm and inches below, and press Share result to keep the link.
Enter the width and height in pixels and the DPI your printer or form states, and both sides come out in centimetres, millimetres and inches.
Pixels, print size and DPI are tied by one rule: pixels = inches × DPI. This page takes any two and gives the third, in centimetres, millimetres and inches, as you type.
Print size from pixels. Enter the width and height in pixels and the DPI. A 4,000 by 3,000 pixel phone photo at 300 DPI prints 33.87 by 25.4 cm, which is 13.33 by 10 inches.
How much DPI is enough. 300 DPI is the usual target for photo prints and ID photos held in the hand, and it is the default here. 200 to 299 still looks good in most prints, 150 to 199 suits posters seen from a metre or more, and below 150 the pixels may show up close. These are guidelines, not rules: when a form or a print shop names a DPI, use theirs.
The rest of the article, and all 6 questions about Photo Size Calculator, are on the Photo Size Calculator page.
Divide the pixels by the DPI to get inches, then multiply by 2.54. At 300 DPI, 600 pixels are 2 inches, which is 5.08 cm. Enter the width and height in pixels and the DPI, and both sides appear in centimetres, millimetres and inches.
At 300 DPI a 35 by 45 mm photo is 413 by 531 pixels: 35 mm is 1.378 inches, and 1.378 times 300 is 413. Tap the passport preset in Pixels for a print to see it, or change the DPI if a form asks for another figure.
A 4 by 6 inch print at 300 DPI needs 1,200 by 1,800 pixels, about 2.2 megapixels. At 200 DPI, 800 by 1,200 pixels is enough for a print that still looks good in the hand. Almost any phone photo has more than either.
No. The DPI number stored in a JPG only suggests a print size; the pixels stay the same. Sharpness in print depends on how many pixels cover each inch, which is why this calculator works from the pixels and the print size alone.
Still stuck? Ask about Photo Size Calculator and anybody who knows can answer. No account needed.
Same job, other tools: Compress Image to 100 KB – Get any photo under 100 KB for forms and portals · Compress Image to 1 MB – Trim a high resolution photo to just under 1 MB · Passport Size Photo – Convert a photo to Indian passport size: 35×45 mm at 300 DPI, exactly 413×531 pixels · Resize Image for Instagram – Square, portrait and story sizes in one click · Image Converter – Convert between JPG, PNG, WebP, AVIF, BMP, TIFF and ICO, from ten input formats.
On the related tools: HEIC to PNG – Convert iPhone HEIC photos to lossless PNG.