- 354 × 472 px at 300 DPI
- 30.0 × 40.0 mm
| 72 DPI | 85 × 113 px |
|---|---|
| 96 DPI | 113 × 151 px |
| 150 DPI | 177 × 236 px |
| 300 DPI | 354 × 472 px |
| 600 DPI | 709 × 945 px |
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3 × 4 cm in pixels
3 × 4 cm is 354 × 472 px at 300 DPI, the usual print resolution, and 709 × 945 px at 600 DPI.
Independent tool, not affiliated with any government. Confirm the rules at the official source.
How to work out any photo size in pixels
- 01
Enter the width and height
In mm, cm, inches, or pixels to go the other way.
- 02
Pick the DPI
300 for prints from a shop or home printer, 600 if a printer asks for it.
- 03
Read the size
Pixels, millimetres and inches update as you type.
Good to know
- Pixels = size in inches × DPI, and one inch is 25.4 mm. That is all the calculator does.
- Printers and photo shops print at 300 DPI as standard. Screens ignore DPI and show pixels.
- An image with fewer pixels than this prints soft at this size. Changing the DPI number alone doesn't add detail.
Making a 3 × 4 cm pas foto
For CPNS on SSCASN
A 4 × 6 cm pas foto on red, kept between 80 and 200 KB as the form checks.
Red or blue background
Repaint the background of any photo of a person in your browser, then crop it to size.
Several 3 × 4 cm photos on one print
Lay them out on one 4 × 6 in print with cut lines and print it at 100 %.
Questions people ask
How many pixels is 3x4 cm?
3 × 4 cm is 354 × 472 px at 300 DPI, the usual print resolution, and 709 × 945 px at 600 DPI. On a screen at 96 DPI it is 113 × 151 px.
What is 3 × 4 cm in other units?
3 × 4 cm is 30.0 × 40.0 mm, or 1.18 × 1.57 in.
What DPI should I use for a 3 × 4 cm photo?
300 DPI for prints from a photo shop or home printer. For an online form, use the pixel size the form states instead: forms count pixels, not DPI.
How many megapixels do I need to print 3 × 4 cm?
0.17 megapixels: 354 × 472 px at 300 DPI. Phone cameras take far more, so a photo straight from the camera prints sharp; one saved from a chat app may have been made smaller.
Is 3 × 4 cm the same as 35 × 45 mm?
No. 3 × 4 cm is 30 × 40 mm, 5 mm smaller each way than the 35 × 45 mm passport size (413 × 531 px at 300 DPI). Use the one your form names.
What shape is a 3 × 4 cm photo?
3:4, the same shape as most phone photos, so a phone photo fits it with nothing cut off once your head is framed.
Which background colour should a pas foto have?
The form or office decides. CPNS on SSCASN asks for red; many schools and offices ask for red or blue. The change background tool on this site repaints it in your browser.