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How Big is a 4×6 Photo? (Actual Size in Pixels, Inches, cm & mm)

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Let’s take close a look at the 4×6 photo size. 4×6 is the most common photo format you will encounter. So it’s worth knowing its precise measurements!

The dimension 4×6 is measured in inches. So a 4×6 photo is about 4″x6″ (four inches by six inches) —4″x5⅞,” to be exact.

Comparison chart of photo print sizes

How Big is a 4×6 Photo?

Here are the conversions for 4×6 photos:

  • Centimeters—10x15cm
  • Millimeters—101x152mm
  • Pixels—the values changes depending on the image’s dpi.
    • 150 dpi—600x900px
    • 300 dpi—1200x1800px

View the actual size of 4×6 on the PilliApp website.

Picture showing how most digital cameras viewfinder are 3:2 in ratio
Digital viewfinder in 4×6 (3:2) ratio

Why is 4×6 the Most Common Aspect Ratio?

You find the 4×6 aspect ratio everywhere in photography. That’s because of its 3:2 aspect ratio—the standard size of photos in modern photography.

The 4×6 print size mirrors the aspect ratio of 35mm film cameras. And digital camera sensors have been made in the same way as the old film cameras. So this 3:2 ratio is what most digital cameras sensors use. That means most digital viewfinders are the same ratio.

It is also the most common size for 35mm prints. That’s why most photo albums will be in this size!

Woman looking through a photo album with 4x6 photo print in it

Common Issues With 4×6 Photos

There are a few problems with this standard picture size to keep in mind. It comes up when you want to print a 4×6 picture.

Cropping

Big printing services often prefer printing in the 4×6 size. That’s because it’s the best way to enlarge 35mm film pictures.

Be aware that the photofinishing industry often trims off three millimeters on each side of the photograph. And their process to trim the image isn’t exact.

So make sure there are no critical elements along the edge of the image. Avoid faces and other important objects along the edge of your compositions.

Resolution

You do not want to print any lower than 480x640px when printing a 4×6 photograph. Check the size of your photograph in Photoshop by opening up your photo and going to Image > Image Size. Then change the parameters to pixels.

Photo of cat with bleed marks around it
Three-millimeter red border to show what a trimmed print photo looks like

How to Resize a 4×6 Image

Smartphone sensors have a slightly bigger ratio than 3:2. The most common is 16:9. So I will now show you how to ensure your photo is 4×6 without losing any image resolution.

First, you want to get your image up in Photoshop.

Screenshot of opening picture in Photoshop

Go to the top and select Image > Image Size. Then change your parameters to be measured in inches.

Sizing panel to change picture dimensions

Make sure you have “Resample” unchecked and enter in six on the longest side of your photo.Unchecking resample in picture sizing panel in Photoshop

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

Changing dimensions in canvas size panel

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

The anchor box in the canvas size panel

Now, you have a 4×6 photograph!

4x6 photo of a cat underneatch a blanket

Conclusion

You should know everything about the dimensions of a 4×6 photo and why it’s essential in photography. Remember, nearly all photo printers cut this picture size down to just below 4×6. So, keep this in mind the next time you get your photos printed!

Try out our Urban Smartphone Minimalism e-book to create simple, print-worthy shots!

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