How Big is a 4×6 photo?

If you’re looking to print your digital photos, you may feel confused about the printing sizes offered by online and physical shops.

This is normal because we’ve lost touch with printed photography. Plus, camera sensors no longer follow a single standard size like film did.

To complicate things further, different countries use different measurement systems: some use inches (Imperial/US Customary), while others use centimeters (metric).

So, let’s talk about one of the most common printing sizes: 4×6.

What is a 4×6 photo?

4×6 is a standard printing size, expressed in inches: 4 inches by 6 inches in landscape format. If you’re talking about a portrait-oriented photo, it’s 6 inches by 4 inches (6×4).

In the above photo, you can see a 4×6 print on top of an A4 notebook, on top of an A3 cutting board for comparison.

This size is also commonly called postcard size. I know that in the digital days, most people don’t send postcards. However, it’s still common to see postcards in souvenir and museum shops, or as advertising in coffee shops or neighbourhood businesses.

Anyway, if talking about postcards sounds as abstract as saying 4×6, let’s talk numbers.

What size is 4×6 in Pixels?

The number of pixels in a 4×6 photo depends on its resolution. I won’t go down that rabbit hole because it’s a complex topic and would take too long.

So, here are a couple of examples – remember that the best resolution for printing is 300 ppi.

• At 125 pixels per inch, a 4×6 photo is 500 x 750 pixels.
• At 300 pixels per inch, a 4×6 photo is 1200 x 1800 pixels.

You can read our article “How to choose photo resolution and size for printing and online” if you want to learn more.

What size is 4×6 in centimeters?

If you live in a country where the metric system is the norm, you may get a better idea of how big a 4×6 is if you know the size in centimeters.

4×6 prints are approximately 4 inches by 6 inches, or 4″ x  5 ⅞” (10 x 15 cm / 101.6 x 152.4 mm). This is a standard photo print size since it mirrors the aspect ratio of the viewfinder of most digital cameras.

The typical exception is when you take photos with a smartphone, which is a different shape from a 4×6 photo.

This means that when you use an iPhone or Android camera, your photo has to be cut off (cropped) to make it fit on a 4×6 print – handy to know if you’re putting the photo in a standard-size picture frame.

Since we’re on the topic, let’s talk about aspect ratio.

What is the Aspect Ratio of a 4×6 Photo?

The aspect ratio refers to the relationship between the long and short sides of a photo. It determines the shape.

The aspect ratio of a 4×6 photo is 3:2, which respects the aspect ratio that 35mm film photography used to have.

Other common aspect ratios are 1:1 (square photos) and 4:3, which is the default ratio for photos taken with a smartphone. See our article on 4:3 vs 16:9 for more clarification on this.

Common Uses and Practical Benefits

Credit: Cottonbro

It’s very common to use 4×6 prints because they’re compact yet large enough to clearly see all the details.

They’re also quite affordable; in fact, they’re free in many cases. One example is the app FreePrints, which we reviewed here at Shotkit.

This size is also the most common for photo albums and scrapbooks.

Additionally, you can undoubtedly find a wide variety of photo frames at very affordable prices. While they’re a bit small to hang on a wall, they’re perfect for your desk or a shelf. Many people also hang many 4×6 frames on the wall, creating beautiful designs.

Pro Tip: How to avoid faces being cut off from the edges of your photos

Nearly all photo printers cut off an additional 3mm (approximately 0.12″) from around the outside of your image.

Unfortunately, most photo printing services don’t tell you about this when you upload your photos.

Just make sure that faces and other important objects aren’t close to the edges of your photo when you’re taking a shot, or choose an alternate crop to avoid cutting anything off.

If you’re not afraid to crop and need a larger print size, see our guide: how big is a 5×7 photo?

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