Resize Image in cm, mm & Inches
Set the print size you need, such as 3.5 × 4.5 cm or 4 × 6 in, pick a DPI and download a photo that prints at exactly that size.
How to use Resize Image in cm, mm & inches
- 1
Upload a photo
Drop a JPG, PNG or WEBP image. It stays on your device.
- 2
Set the size and DPI
Type the width and height in cm, mm or inches, or choose a preset, then pick 300 DPI for print or another resolution.
- 3
Fit and download
Keep proportions, crop to fill (drag to position) or add padding, then download a JPG or PNG with the DPI saved inside.
Resize a photo to centimetres, millimetres or inches
Screens measure images in pixels, but printers and forms ask for physical sizes like 3.5 × 4.5 cm, 35 × 45 mm or 2 × 2 inches. The link between the two is the resolution in DPI (dots per inch): pixels = inches × DPI. At 300 DPI, a 3.5 × 4.5 cm photo is 413 × 531 pixels.
Features
- Any unit: enter sizes in cm, mm or inches and switch units at any time.
- DPI presets: 72 and 96 DPI for screens, 150–300 DPI for photo prints, 600 DPI for line art, or a custom value.
- Ready-made sizes: passport and visa photos, wallet photos, 4 × 6, 5 × 7 and 8 × 10 inch prints, A6 to A3, US Letter and Legal, business cards.
- Three fit modes: keep proportions, crop to fill with a draggable position, or fit inside with a padding colour.
- Correct metadata: the DPI is written into the JPG (JFIF) or PNG (pHYs) file, so Word, Photoshop and print shops show the right size.
- Sharpness check: you are warned when the photo has too few pixels for the chosen size and DPI.
Common photo sizes
- Passport photo (EU, UK, many countries): 35 × 45 mm.
- US passport and visa: 2 × 2 inches (51 × 51 mm).
- Standard prints: 4 × 6 in (10 × 15 cm), 5 × 7 in, 8 × 10 in.
To change only the DPI without resizing, use Change DPI. For an exact file size in KB, use Compress Image to Size.