The pixels a print size needs in centimetres, at 300 DPI or your own
Processed in your browser. Nothing is uploaded. Updated on 25 Oct 2026.To print a picture 10 cm wide at 300 DPI it needs 1,181 pixels across, because 10 cm is 3.937 inches and each inch holds 300 dots. Enter the print width and height in centimetres, or pick passport, 2 by 2 inch, 4 by 6 inch or A4, and the pixels needed appear at once.
Pixels for a print is already chosen, with the print size measured in cm.
Type the Print width and Print height in cm, or tap Passport 35×45 mm, 2×2 in, 4×6 in or A4.
Change DPI (dots per inch) if your print shop or application form asks for a figure other than 300.
Read the pixels needed at the top and the megapixels below, then press Share result to copy a link.
Change the DPI if your print shop or application form asks for a different figure.
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.
Pixels for a print. Enter the print size, or tap a preset: passport 35 × 45 mm, 2 × 2 inch, 4 × 6 inch or A4. At 300 DPI these need 413 × 531, 600 × 600, 1,200 × 1,800 and 2,480 × 3,508 pixels. Pixels are rounded to the nearest whole pixel, the same way Resize Image rounds its presets.
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: Passport Size Photo – Convert a photo to Indian passport size: 35×45 mm at 300 DPI, exactly 413×531 pixels · Visa Photo 2x2 Inch – Crop or resize a photo to 2x2 inch: a square 600×600 pixels at 300 DPI for a US visa.
On the related tools: HEIC to PNG – Convert iPhone HEIC photos to lossless PNG.