PHLEARN MagazineHow to Know Which Aspect Ratio to Use in Your Photography

How to Know Which Aspect Ratio to Use in Your Photography

For any given photo, aspect ratio describes the proportional relationship between your image’s width and height. You can find aspect ratios that are used commonly in photography and film in many of the objects in the world around you. In fact, you needn’t look further than your TV screen (or computer) to find examples:

  • Your old-school TV/computer display has a 1.33:1 aspect ratio (almost a square).
    • A ratio like this means the image on the screen may be smaller than it was originally, or the edges have been cut off so the image can fit onto your screen.
  • Your TV (for example, those equipped with HDTV) has an aspect ratio of 16:9 (this is a widescreen format, where the width is just about twice as long as the height).
    • This type of ratio captures the effects of high definition technology to their fullest.
  • Your local in-theater or home movie theaters typically have an aspect ratio of 2.35:1 (widescreen CinemaScope format).
    • This ratio is specially designed to help you become immersed in the show.

As you read through these examples, you may have realized that ratios can change the way you view images quite dramatically. Indeed, they can completely transform the viewing experience of your photos.

Now that you know what a few ratios look like (keep them filed away as reference points for when you do your own shooting), let’s talk more about what you need to know to make use of them as a photographer.

First of all, an aspect ratio starts with the number associated with the width, separated by a colon, and then ends with the number associated with the height, like so:

x:y (the width always comes first)

The x:y is an expression of a ratio, so you will encounter different sizes of photographs that use the same ratio. For instance, if you shoot a 6 x 4” photo, you’ve just captured an image with a ratio of 3:2. And, if you shoot an image of roughly 8 x 5.3 inches, you’ve just captured an image with the same ratio of 3:2.

In other words, when it comes down to it, the aspect ratio establishes ratio and shape, but not the size of your image.

The ratio is directly determined by the size of your camera sensor, but most of the newer DSLRs allow you to change the aspect ratio. The following graphic illustrates how you can change the aspect ratio within the limited size of a particular sensor below:

Image by WikimediaImages from Pixabay

Why Is Aspect Ratio Important?

For Technical Reasons

Aspect ratio might seem like a foreign concept at this point, but you’re going to need to know about it (or have most likely already encountered issues relating to it) when you’re posting your photographs online.

For instance, the aspect ratio of your Facebook profile pic will be different when you’re viewing it on a medium like your phone, as opposed to viewing it on your laptop. Because of this, the various social networking platforms or website builders will force you to fit your photos within standard aspect ratios. So, if you don’t want your profile pic distorted, stretched, or cut off, you’re going to want to match the ratio of your profile pic to their standard aspect ratio (see our section on social media below for a list of aspect ratios a few social networking sites prefer).

The same idea applies if you’re going to be printing your photos. If your aspect ratio doesn’t match the size of your print, you may end up with a cropped or stretched photo.


If you’re planning on printing your photos, you’ll need to know which ratios are required for common print sizes:

  • 6 X 4” = 1.5:1 ratio
  • 7 X 5” = 1.4:1 ratio
  • 10 X 8” = 1.25:1 ratio
  • 11 X 8.5” = 1.29:1 ratio

For Aesthetic Aims

  • Changing the ratio will impact where your subject is positioned in relation to the sides of the frame. It also allows you to play with the amount of empty (or negative) space in the photo.
  • Your aspect ratio can be used to convey emotion. For example, a ratio of 2:35 allows for empty space within a photograph. So, by placing a person in this frame, you’ll be able to convey their feelings of loneliness. A landscape shot or wilderness photo with a similar ratio could evoke the same feeling or give an expansive quality to your image.
  • Changing your aspect ratio may also help if you feel you have some extra “room” in your photo (this often applies more to vertical images). A vertical image may be too roomy at a ratio of 2:3, while a ratio of 4:5 could give the photo a snugger frame, resulting in a more appealing composition.

Ratio Problems to Avoid (That Will Detract from Your Composition)

  • If you shot according to the rule of thirds using a 4:3 ratio, and then needed to create prints with a 3:2 ratio, the composition of the shot may not adhere to the rule of thirds anymore.
  • You may see a large dip in quality when attempting to shoot a ratio that’s larger than the ratio of your camera’s sensor:
    • If your sensor’s ratio is 4:3 (a micro four-thirds camera), your best bet is to shoot in 4:3 or 1:1. If you try to shoot in 3:2 or 16:9 with this sensor, you will find you’ll have to crop your photo substantially (which will mean a drop in image quality).
    • To avoid this issue, you may want to consider purchasing a camera with a larger sensor size. Buying a camera with a larger sensor will not only give you more options for ratios but comes with other benefits as well (including better low-light photos, increased dynamic range and more background blur).

In the next few sections, we’ll dig deeper into aspect ratios and discuss:

  • Whether you should make ratio adjustments before you shoot – or shoot first, then adjust your ratio later
  • How the ratios available on your camera will impact your shots
  • Common and not-so-common ratios and where you might use them
  • Which ratios to use for social networking apps and websites
  • The Golden Ratio (another composition method to put in your toolbox)
  • Film preferences (because cinematographers also keep a keen eye on their aspect ratios)
  • Perfecting proportion in your post-processing (tips and tricks to keep your image high quality)

Photo by rawpixel on Unsplash

Deciding on the Aspect Ratio Before Shooting vs. Cropping in Photoshop

There was a time when deciding between adjusting your aspect on your camera or cropping in Photoshop wasn’t a viable choice for anyone because DSLRs weren’t capable of allowing users to change aspect ratios while shooting. Instead, cameras came in only one format.

Back then, the dimensions of your camera’s sensor (or the film type, along with the camera’s design) would dictate the ratio. For example, a sensor that’s 1.5 times as wide as it is high produces a ratio of 3:2. Cameras that produce this ratio include those using a 35mm crop sensor, full-frame SLRs, and most 35mm film cameras.

Now, thankfully, you can choose whether to change the ratio while out in the field or crop your photos at home with a cuppa.

If you choose your ratio before shooting, you will have the advantage of being able to literally visualize what your image will look like after it’s been cropped. You will be able to see the cropped image either in the viewfinder (if your camera has an electronic one) or on your camera’s LCD screen in Live View mode.

There is one drawback to choosing the ratio while shooting: if you choose to shoot your photos in JPEG, your camera will crop your image. There is no way to retrieve the parts of the photo that were cropped. You can solve this problem by shooting in RAW mode.

If you can’t change your camera’s aspect ratio, post-production may be the only way you can crop your photos. And even if your camera does have that capability, many find cropping to be easier in post-production. Another advantage is that you can review old photos to see if you can change the ratio to create a better aesthetic.


It’s easy to change the aspect ratio on your smartphone, too. The iPhone is capable of taking photos in 1:1 (square), 16:9 (panoramic, which is best for video), and the default mode, 4:3.

In the “Photos” app, you can also crop your image anywhere from 1:1 to 9:16 (remember that the ratio is always width:height, so the latter ratio will crop your photo vertically).

To do so, you simply:

  1. Select your photo
  2. Click on “Edit” at the top right corner
  3. Select the “Crop” button (to the right of “Cancel”)
  4. Then, hit the “Ratio” button (above “Done”)
  5. Select a ratio from the menu, and the new ratio will be applied

Examples of Aspect Ratios

In this guide, we’ve discussed many of the technicalities involved in using ratios. However, once you’ve mastered those, you can let the creative juices flow.

Above all, don’t get stuck in the rut of choosing one of the common aspect ratios and sticking to it.

Instead, use the following examples as your inspiration.


A 4:3 ratio is compatible with printed 5 x 7” or 8 x 10” photos. Landscape photography often works well in this type of format. This is because this ratio is wider than it is tall, which guides the viewer’s eyes from left to right, leading their gaze across your scenery.


The 3:2 ratio corresponds to the classic 4 x 6 photo (the default ratio for 35mm cameras) and is slightly wider than a 4:3.


Maybe it’s the content (or could it be in the shape?), but this looks like part of a story to us. The 16:9 ratio is commonly used as part of cinematography to do just that. This size is also considered panoramic. In the late 2000s, this ratio became more popular than the 4:3 style for movie-watching. These days, it’s also the norm for online videos.

Lesser-Used Ratios


The photographer has created a stunning visual effect here by capturing a square within a square shot:

A 1:1 ratio can also be applied to simplify an image, as seen here. Many photographers stick to a minimalistic theme in the scenes they shoot square, exemplified in the simple, but powerful image seen here:


Of course, panoramic shots like this one of Phi Phi Island in Thailand are perfect for sweeping shots of landscapes:


Commonly-Used Aspect Ratios

Cameras often come equipped with ratios of 3:2, 4:3, 16:9 and 1:1. 16:9 is often the default mode for shooting videos, and 1:1 is perfect for capturing square photos for Instagram.

Best Ratios for Online & Social Media Viewing

Social media has its own set of rules – and each platform will have its own criteria. If you mismatch the aspect ratio of your photo to the one your social networking platform specifies, your image may end up stretched, distorted or cut off. For an idea of what different platforms require, see the figures below (as of 2019).


  • Profile Pic: 180 x 180px (1:1 ratio)
  • Cover Image: 820 x 312px (2.63:1 ratio)
  • Shared Link: 1200 x 628px (1.9:1 ratio)


  • Profile Pic: 400 x 400px (1:1 ratio)
  • Header Photo: 1500 x 500px (3:1 ratio)


  • Profile Pic: 110 x 110px (1:1 ratio)
  • Photo size (what the user sees when scrolling through their feed): 1080 x 1080px (1:1 ratio)


What are pixels?

Every photo is made up of pixels. They are the smallest unit in your photos, can be round or square, and each one of them contains a color. The greater the number of pixels, the more detailed – and more true-to-life – your photo will be.

The number of pixels is referred to by some as the resolution. The number of pixels can also be used to express the width and height of your photo. For instance, in a resolution of 2400 x 3000, there are 2,400 pixels from the left to right (ie. width) and 3,000 pixels from top to bottom (ie. height).

Consult your camera’s manual to see if you can increase the amount of pixels included in your photographs.

The Golden Ratio

We’ve already discussed how changing your ratio will have an impact on your composition. The golden ratio is also a tool used to help with composition (like the rule of thirds).

Leonardo Fibonacci was the first to note the power of the golden ratio in 1200 AD. Fibonacci saw the golden ratio appear again and again in nature, and he noticed how attracted the human eye was to it. This ubiquitous ratio is that of 1:1.618.

You could make use of this ratio by constructing a grid as you do when using the rule of thirds. However, with this type of grid, the ratio from the top of your picture to the first line will be 1, the ratio from that first line to the second line will be 1.618, and the ratio from that second line to the bottom of your photo will be 1.

Or you could use the golden ratio using curved lines that also follow the ratio of 1:1.618, like the following:

Image by NDV on Pixabay

Using the golden ratio, you can place parts of your image on a curved line, leading the viewer of your image to the part of your overlay that looks like a coil, where you have placed your point of interest, as in this example:

Image by Gerd Altmann from Pixabay

In the photograph below, the golden ratio emphasizes the chain on the child’s wrist.

Image by yandso1 on Pixabay

Film Preferences

Along with photographers, cinematographers are no strangers to aspect ratios.

When films were first projected using a perforated film strip, the ratio on the screen was 4:3 (or 1.33:1). When producers started to add sound to movies, the film strip grew a bit too large to accommodate for this audio information, and the ratio became 1.37:1. After this ratio gained approval from the Academy of Motion Picture Arts and Science in 1932, it became famed for being the “Academy Ratio.”

In the 1950s, TV was becoming popular, and it was starting to look like it might compete with movie theaters for viewers. This prompted the theatres to introduce films with a 2.59:1 ratio. Notably, MGM pulled off a ratio of 2.76:1 (which you may have seen in Ben Hur).

Ratios like these posed a problem when viewers tried to watch shows like Ben Hur on their home TV screens. The ratios didn’t fit the typical 4:3 ratio of a home television, so viewers had to contend with viewing their favorite movies with imposing black bars at the top and bottom of their screens (ie. letterboxing). Here’s a clip of Ben Hur, so you can see what we mean.

Today, most films are seen in 1.85:1 and 2.39:1. In some cases, filmmakers have changed ratios mid-movie. For instance, in The Grand Budapest Hotel, the prologue and epilogue are shot in 1.85:1, in 2.35:1 for the 1960s portions, and in the 1.37:1 ratio for the main sections of the film.


Interested in creating images that harken back to the days of watching Ben Hur on a home television set? Check out this two-minute video from PHLEARN to find out how to give your image a cinematic look, complete with black cinematic bars, which will reduce your photo to a 16:9 ratio.


Steps for changing the aspect ratio in Photoshop (Image by quangle on Pixabay):

  1. Choose the “Rectangular Marquee” tool (top left).
  2. Select “Fixed Ratio” from the Style list.
  3. Set the width and height of your desired ratio (but don’t choose measurements).
  4. Choose the portion of the image you want to keep.
  5. Click on “Image” in the dropdown menu, and then select “Crop.”

If you only have the width and height in pixels, an aspect ratio calculator will come in handy.


Need to crop to a certain paper size in Photoshop?

Just enter the size of your print as the ratio in the width and height boxes, just as you did in the example above (for example, 8.5:11).

The Current State of the Aspect Ratio

If we haven’t yet convinced you that manipulating your aspect ratio can change the state of your photography game, consider the impact social media has had on the aspect ratio:

Catering to smartphone users, Instagram popularized the square format. Although a 1:1 ratio would cut details out of, say, a 16:9 ratio substantially, a 1:1 photo or video can look a lot more attractive when framed by your cell phone.

This 1:1 ratio has also appeared on Facebook. More than 90 percent of Facebook’s monthly users (1.74 billion people) look at Facebook on their mobile phone. And 60 percent of those users only access their accounts from their phones.

As you can see, technology has changed the types of aspect ratios photographers and business owners must use while online.

What does this mean for you?

First, you should continue to pay attention to the ratios online technology requires. Second, you shouldn’t be afraid to experiment with uncommon aspect ratios.

You may just come up with new creations that will lead your viewers to see things in a whole new light.

Seth Kravitz

Seth is the CEO of PHLEARN and an avid writer, photographer, startup investor, and business mentor in Chicago. He joined PHLEARN in 2016 and has been focused on expanding the community to reach millions of new Phans and make learning fun for the next generation of great artists.