40 × 50 mm Photo Resizer
The form has asked for a 40x50 mm photo, but the original image can still have a different shape. This 40x50mm photo resizer changes the frame to a 4 × 5 cm portrait while keeping the face in its natural proportions. Check the form’s own file instructions before you submit the saved image.
Resize a photo to 40x50mm online
Upload the clearest original photo you have. Adjust the 4:5 portrait crop and save the file after checking the final dimensions.
Need to resize a 40x50 mm photo online? Upload the clearest original image. Fit it inside the 4:5 portrait frame without stretching the face. Open the saved file after export and compare its dimensions with the form before submission.
40x50 mm Photo Size in Pixels and Centimetres
The 40x50mm photo size describes a portrait canvas. It equals 4 × 5 cm. The first number is the width and the second is the height, so the photo has a 4:5 shape. At 300 pixels per inch, the calculated size is about 472 × 591 pixels. Use that as a working profile only because the form can request different pixel dimensions or file details.
| Output detail | Value |
|---|---|
| Physical size | 40 × 50 mm |
| Centimetre conversion | 4 × 5 cm |
| Portrait shape | 4:5 |
| Approximate inch size | 1.57 × 1.97 inches |
| Working pixel profile | About 472 × 591 pixels at 300 pixels per inch |
Here, 4 × 5 refers to centimetres, not inches. A 4 × 5 inch image has a different physical size and should not be selected for this page.
Resize a 40 × 50 mm Photo Without Stretching the Face
Most phone photos do not start in a 4:5 shape. The editor can remove extra space from the sides or from the top and bottom to create the right frame. Keep the face natural while adjusting the crop. If the source already cuts off the head or chin, choose another photo because resizing cannot restore the missing area.
Place the subject according to the form’s instructions. Keep the proportions locked while moving the frame. A stretched face can fit the numbers but still look visibly altered.
- The head remains fully visible when the form requires it.
- The face stays in its natural proportions.
- The crop leaves suitable space around the subject.
- A clearer original is used when the first image is blurry or cut off.
The 4x5 cm photo resizer changes the frame around the person. It should not reshape the person inside the frame. Review the crop before exporting so a small adjustment does not become a problem in the saved file.
Check the saved 40x50mm photo before submission
The editor preview is only a working view. The form receives the exported file. Open that file on your device and check these four points before upload:
- The image keeps the 4:5 portrait shape.
- The pixel dimensions match the form.
- The file format is accepted.
- The file size is within the stated limit.
If the image has the right shape but the file is too large, use the separate passport photo compressor. If the crop or visible face needs another review, use the passport photo checker. Keep these links separate because they serve different needs.
Use 40 × 50 mm only when the form requests it
Some document routes ask for a 40 × 50 mm photograph while others use a different size. Read the current instructions for the exact form before selecting this profile. This page prepares the 4 × 5 cm canvas. It does not decide whether the receiving office accepts the photo.
For one official example, the Hong Kong Immigration Department lists a 40 mm wide by 50 mm high photograph for travel documents. That example does not make the size universal. Read the Hong Kong Immigration Department photo requirements for that route.
Questions about the 40x50mm photo size
What is 4x5 in pixels?
For a 4 × 5 cm image at 300 pixels per inch, the calculated output is about 472 × 591 pixels. The final digital setting should follow the form because it can request another pixel size.
What are the 4x5 dimensions?
On this page, 4x5 means 4 × 5 cm. That is 40 mm wide and 50 mm high, with a 4:5 portrait shape. It does not mean 4 × 5 inches.
How big is a 4x5 picture?
The physical photo is 40 × 50 mm or 4 × 5 cm. In inches, it is approximately 1.57 × 1.97 inches. The displayed size can look different on a phone or computer.
Can I resize a photo to 40 × 50 mm without stretching the face?
Yes, when the source image is large enough for a clean portrait crop. Remove extra space around the subject and keep the proportions locked. Do not stretch the image. Use another original when the head is already cut off or the photo is too blurry.
PassportPhotoBox is independent software for preparing an image. It does not issue documents or decide whether a receiving office will accept the file. Check the current instructions for the form before submission.
Check your passport photo before submission
Before submitting the image, open the saved file once more. A quick check of the portrait shape and file details is easier than correcting an upload that does not match the form.
Sources for the measurement and application example
The measurement on this page is a unit conversion. The application example was checked against the official Hong Kong Immigration Department photo instructions on 30 August 2026. That source describes one travel document route and does not make 40 × 50 mm a universal photo size.