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How to Change Ratio of Video in a Quick & Easy Way

Liza Brown
Liza Brown
Originally published Jan 04, 22, updated Feb 29, 24
How to Change Ratio of Video in a Quick & Easy Way

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It is important that how your video appears on the screen and for this aspect ratio is one of the most important factors. Several times, when your video appears awkward or cropped on a certain site or a device, it means that its aspect ratio is not correct and the best solution here is to change the aspect ratio. Using related software and programs this task can be done easily.

The article will throw more light on these tools that can change ratio of video.

 Part 1 What is Aspect Ratio and Why Does It Matter?

Aspect ratio is the relationship between the width and the height of the video and it defines how your video will appear on the screen. The right aspect ratio is important to offer a pleasing viewing experience. With multiple social media sites supporting different aspect ratios, the need for changing them accordingly arises quite often.

The marketing, business, and all other activities have taken an online route and with this, the video content on several social media sites for promotion has also increased. So, if you upload a video with a certain aspect ratio on a different platform, they will look weird with cropped portions, black borders, and other issues that will lead to a negative viewing experience and impact.

Though there is no fixed or standard aspect ratio that can be considered as the best as different values are suitable for different platforms and sites. Some of the commonly used aspect ratios are as below.

16:9- This is one of the most widely used aspect ratios and appears in the form of a wide rectangle. The majority of the video players as well as capturing devices use this aspect ratio as their default settings. The best resolution that can be used with this aspect ratio is 3840 X 2160 pixels.

1:1- Originally this aspect ratio was used for square TV sets but now it is majorly used for the videos on Instagram and Facebook. A lot of cameras also support this setting.

9:16- The setting for this aspect ratio has become popular after the increased use of smartphones. Used for the tall videos, the setting can be seen in the videos posted as an Instagram story, Snapchat, and Facebook.

21:9 – This setting of the aspect ratio is used for cinematic widescreen or videos with the anamorphic format. The use of this aspect ratio is very particular and videos supporting this setting generally can be seen in theme parks, special theatres, and museums.

Regarding social media sites, below listed are the popularly used aspect ratio.

Square (1:1) – Used for Facebook and Instagram feed videos.

Vertical (9:16) – Best for Instagram story videos and snaps

Horizontal (16:9) – Used for (9:16 YouTube videos

Landscape (5:4) – Apt for landscape videos on Facebook and Twitter.

Portrait (4:5) – Used for the portrait videos to be posted on Twitter and Facebook.

For the Facebook cover video, 21:9 is the recommended aspect ratio.

Commonly Used Aspect Ratio

 Part 2 Difference Between Aspect Ratio and Resolution

Aspect ratio and resolution are interrelated and go hand-in-hand. For a certain aspect ratio, there is several counterparts’ resolution that can be used. While the aspect ratio defines the width and the height relationship, the resolution is the number of pixels on the screen.

To obtain the resolution of a video, you will multiply the height by the width while for the aspect ratio, width is divided by the height. When the height is multiplied by its width times, the results you get represent the square pixels of your screen and this number dented the quality of the video. The higher the pixels, the higher will be the video quality.

5 Quick Ways to Change Video Aspect Ratio on Windows and Mac

To make your videos suitable for different platforms and sites, you would need to change the aspect ratio, and to get this task done there are several windows and Mac-based tools available. Listed below are the top ones that will let process the videos quickly.

VideoProc Converter

This is a Windows and Mac-based full-featured software that allows performing multiple tasks like changing the aspect ratio, editing videos, converting files, and more. Using the program, you can easily change the aspect ratio without any quality loss and without adding any black bars or video stretching. Further video customization as needed can also be done using the tool.

Steps to change the aspect ratio

Step 1. Download, install, and run the software on your system and select the Video option.

Step 2. To add the video, click on the + Video button. Next, choose the target format for the video.

Step 3. Next to change the aspect ratio of the video you can either resize the video or can crop it. While resizing the video, you will need to change the resolution from the Codec section. Alternatively, you can also use the Crop toolbar for selecting the desired aspect ratio from the supported options.

Step 4. Finally, choose the output folder and then click on the RUN button to start the file processing.

VideoProc Converter

AnyMP4 Video Converter Ultimate

This is a widely used video editing tool that supports multiple functions and features for video customization. Using this program on your Windows and Mac system you can change the aspect ratio of the videos using the pre-set options or manually. All popular video formats are supported by the software and the files are processed in lossless quality.

Steps to change the aspect ratio

Step 1. Run the installed software and add the video by clicking on the +Add Files button.

Step 2. Click on the Edit icon and a pop-up editing window will open. Go to the Crop section and expand the drop-down list at the Aspect Ratio. Choose the desired option. You can also change the aspect ratio manually by moving the crop box. Click on the OK button when selected.

Step 3. Next, choose the output folder, target format, and then finally click on the Convert All button to start the processing.

AnyMP4 Video Converter Ultimate


This is among the early transcoding tools and is known for its support of rich features for video customization. Several video parameters including aspect ratio can be adjusted using the tool and it also supports functions like conversion, disc ripping, video enhancement, and more. A wide range of formats for processing is supported by the software that is available for the Windows system.

Step to change the aspect ratio

Step 1. Launch the software and add the desired video from the File tab.

Step 2. After the video is added, choose the Picture tab at the bottom menu.

Step 3. At the Aspect Ratio section, pull the menu and choose from the available options. Other parameters can also be changed as needed.

Step 4. Choose the output folder and start processing the file.



To change the aspect ratio of a video on your Mac systems without installing any third-party software, iMovie works as the best tool. Using the program, you can even do basic editing simply and quickly. You can resize the videos in iMovie by simply cropping or exporting them using pre-set aspect ratio options.

Steps for iMovie aspect ratio change

Step 1. Open the iMovie on your system and tap on the Create New button at the top-left corner.

Step 2. Choose the Movie option from the drop-down menu.

Step 3. To add the video, click on the Import Media button and then tap on the Crop icon present on the top toolbar.

Step 4. Move the edges of the video and when done tap on the blue-tick icon present at the top-right corner.

Step 5. Next, click on the Share icon at the top-right corner and then the video can be saved to the desired location.


Using iMovie you can also change aspect ratio iphone video.

Wondershare Filmora

Wondershare Filmora Video Editor is an excellent Windows and Mac-based software for changing the aspect ratio of your videos and editing it using a variety of functions. The files can be processed in lossless quality using the tool and the interface is also user-friendly. There are multiple ways by which you can change the aspect ratio using the software and these include - changing it from the starting interface, under project settings, while editing, while exporting, and with the Auto reframe option.

Wondershare Filmora

Get started easily with Filmora's powerful performance, intuitive interface, and countless effects!


The simplest of all ways is by changing the video aspect ratio from the starting interface and the steps for the same are enlisted below.

Step 1. Launch the installed software on your system.

Step 2. At the starting interface, you can choose the desired aspect ratio from the available options – 16:9, 4:3, 1:1, and 9:16.

Step 3. After the selection is done, you can add the video by clicking on the New Project and then edit the file as required using several features.

The above steps can be used to change aspect ratio MP4 as well as all other popular formats.

Step 4. After the video settings are done you can process it and save it at the desired location.

To edit the aspect ratio using other ways, you can check out the details here.

Wondershare Filmora

Key Takeaways from This Episode

Aspect ratio defines how a video will appear on a different screen, social media sites, and platforms.

To use the same video on multiple platforms, you need to change its aspect ratio and for this, good software is needed.

An array of aspect ratio changer tools for Windows and Mac are available. Wondershare Filmora is one such feature-packed tool that can process your files in lossless quality with added features.

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