Passport Size Photo Size in cm, mm, inches & pixels
Standard passport photo dimensions and how to convert them.
A standard passport size photo is 3.5 × 4.5 cm (35 × 45 mm, about 1.38 × 1.77 inches), which is a 7:9 portrait ratio. At the 300 DPI print resolution most portals expect, that is 413 × 531 pixels. The United States is the main exception: it uses a square 2 × 2 inch (51 × 51 mm, 600 × 600 px) photo.
| Photo type | cm | mm | inches | pixels | ratio |
|---|---|---|---|---|---|
| Standard passport photo (India, Schengen, most countries) | 3.5 × 4.5 cm | 35 × 45 mm | 1.38 × 1.77 in | 413 × 531 px @ 300 DPI | 7:9 |
| US passport / visa photo | 5.1 × 5.1 cm | 51 × 51 mm | 2 × 2 in | 600 × 600 px @ 300 DPI | 1:1 |
| UK passport (online) | 4.5 × 3.5 cm | 45 × 35 mm | 1.77 × 1.38 in | 531 × 413 px @ 300 DPI | 9:7 |
| Stamp size photo (India) | 2.0 × 2.5 cm | 20 × 25 mm | 0.79 × 0.98 in | 236 × 295 px @ 300 DPI | 4:5 |
| Indian exam / form photo (common) | 3.5 × 4.5 cm | 35 × 45 mm | 1.38 × 1.77 in | 200 × 230 px (portal-specific) | ≈7:9 |
How to convert cm to pixels for a passport photo
Pixels = centimetres ÷ 2.54 × DPI. For 3.5 cm at 300 DPI: 3.5 ÷ 2.54 × 300 ≈ 413 pixels. Use 300 DPI when the photo will be printed, and follow the portal's stated pixel size when the photo is only uploaded — some Indian exam portals ask for smaller sizes such as 200 × 230 px with a 20–50 KB file limit.
Make your own photo match these numbers
Crop to the 35 × 45 mm shape, set the exact dimensions in cm, mm, inches or pixels with a DPI value, then hit the file-size limit — all in your browser, with no upload.
Passport Size Photo Maker · Universal Photo Resizer · Compress to 20 KB · Passport photo guide