Passport photo pixels: dimensions, formulas and common sizes
Pixel dimensions describe the digital image, while millimetres and inches describe the printed photo. The correct pixel count depends on the physical size and print density unless the application portal publishes an exact digital size.
Quick answer
Use the portal dimensions when they are stated
An exact pixel requirement overrides any DPI calculation. If only a print size is published, convert it with: pixels = millimetres / 25.4 x DPI.
Reference table
| Photo size | At 300 DPI | Aspect ratio |
|---|---|---|
| 35 x 45 mm | 413 x 531 px | 7:9 |
| 2 x 2 in | 600 x 600 px | 1:1 |
| 50 x 70 mm | 591 x 827 px | 5:7 |
| 35 x 50 mm | 413 x 591 px | 7:10 |
| 30 x 40 mm | 354 x 472 px | 3:4 |
Exact, minimum and recommended pixels
Exact dimensions mean both width and height must match. Minimum dimensions allow a larger file with the same aspect ratio. Recommended dimensions are a quality target rather than a hard upload rule. Treating all three as exact is a common reason people unnecessarily enlarge or compress a valid photo.
Why multiplying by DPI sometimes gives the wrong answer
The conversion formula is for printing. Many online portals ignore embedded DPI and validate only width, height, format and file size. A portal asking for 600 x 600 pixels wants that digital canvas even if the file metadata says 72, 96 or 300 DPI.
Do not upscale a small face
Increasing the canvas dimensions cannot recreate facial detail that was never captured. If the original face is soft or blocky, reshoot with the rear camera in better light instead of enlarging the file.
Frequently asked questions
How many pixels is a 35 x 45 mm passport photo?
At 300 DPI it is approximately 413 x 531 pixels. Use a different result only when the application portal publishes an exact digital requirement.
How many pixels is a 2 x 2 inch passport photo?
At 300 DPI it is 600 x 600 pixels. The United States digital-photo rules may allow a wider pixel range depending on the application route.
Does a larger pixel count always mean a better passport photo?
No. More pixels help only when the source contains real detail. Enlarging a blurry image creates more pixels without making the face sharper.
Should I use 300 or 600 DPI for the conversion?
Use the authority or printer requirement. 300 DPI is the common print baseline; 600 DPI is useful only when specifically requested or when a high-resolution print workflow supports it.
Official sources
Related knowledge
Apply this requirement to your photo
Use the matching browser tool, then verify the finished file against the selected country and document.