Dimensions
Resize a photo to 3.5 × 4.5 cm
35 × 45 mm, exactly.
The passport size written in centimetres: 3.5 × 4.5 cm at 300 DPI, which is 413 × 531 pixels.
If the shape differs
Presets
At 300 DPI, 35 × 45 mm is 413 × 531 px. Print at 300 DPI for the exact size.
How did this tool do?
Good to know
About the 3.5 × 4.5 cm size
3.5 × 4.5 cm and 35 × 45 mm are the same size written two ways, and it's the passport standard across the UK, the EU, India, Australia and much of the world. Forms use whichever unit they prefer, which is why the same photo gets requested under different-looking numbers.
Centimetres only describe a print, so they need a resolution to become pixels. At the usual 300 DPI, 3.5 cm is 413 pixels and 4.5 cm is 531 — the size this page produces.
If you're uploading rather than printing, check whether the portal also caps the file size. Resize here first, then compress to their limit, which is commonly 50 KB.
Where you'll meet it
Passport and visa forms
The standard size in most countries outside the US.
Printed ID photos
Photo booths and print shops use the same measurements.
College and job applications
Often specified in centimetres rather than pixels.
Next steps
Guide
How to use it
- 01Drop a front-facing photo taken against a plain background.
- 02The size is already 3.5 × 4.5 cm at 300 DPI — the same as 35 × 45 mm, or 413 × 531 pixels.
- 03Tap Resize and download, ready to print or upload.
Good to know
Questions, answered
Is 3.5 × 4.5 cm the same as 35 × 45 mm?
Yes, exactly the same — one centimetre is ten millimetres. At 300 DPI both come out as 413 × 531 pixels.
What DPI should I use?
300 DPI is what passport authorities expect for print. Lower resolutions produce fewer pixels and can be rejected as too small.
Are my photos uploaded?
No. Resizing happens in your browser, so ID photos and documents never leave your device.