How Big is 4 by 6 Photo? (Pixels, Inch, mm, cm)

A 4×6 photo is a standard format frequently encountered. Familiarizing yourself with its exact measurements can be valuable. Examining a photograph in its true dimensions.

How Big Is a 4 by 6 Photo Actual Size?

Here are the conversions for 4×6 photos.

Centimeters: 10 x 15 cm

Millimeters: 101 x 152 mm

Pixels (The values change depending on the image’s DPI.):

  • 125 DPI: 500 x 750 pixels
  • 300 DPI: 1200 x 1800 pixels

You can view the actual size of 4×6 on the PilliApp website.

Why is 4 by 6 the Most Common Aspect Ratio?

The 4×6 format is very popular in photography due to its 3:2 format  which has become the standard size for modern photographs. This ratio reflects the standard dimensions of 35mm film cameras, and modern digital camera sensors have adopted similar ratios to their film camera counterparts.

This 3:2 ratio is common among digital camera sensors, causing most digital viewfinders to have the same aspect ratio. Additionally, the 3:2 ratio is the most popular format for 35mm prints, making it a suitable choice for the majority of photo albums.

How to Resize a 4 by 6 Photo?

Smartphone sensors typically have a ratio slightly larger than the traditional 3: 2, with 16: 9 being the most common. To keep your photos at 4×6 without reducing their resolution, let me walk you through the process.

Firstly, upload your image on Photoshop.

Next, select Image > Image Size. Then change your parameters to adjust your image in inches.


Make sure you have the Resample box unchecked. Then enter 6 with the height.

Next, go back to the menu and click Image > Canvas Size. Again, change the parameters to inches.

The Anchor box will show you the point at which Photoshop will crop. You can change the anchor point according to the most crucial part of the image.

4 by 6 photo

Contact us if you have any questions.

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