What is KB, MB, GB and Why are They Important? [The 2023 Ultimate Guide]

Nola Jones Nola Jones
Feb 10, 2022 (Updated: Oct 31, 2022)Filed to: Knowledge

GB (gigabyte), MB (megabyte), and KB (kilobyte) represent the digital information storage of a video/audio/image.

If you want to reduce video file size from GB to MB or KB, you can use AnyRec Video Converter. Its built-in video compressor, video converter, video trimmer, and video cropper can make your video smaller than before.

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Understanding file size such as GB, MB, and KB is a great way to avoid exceeding the limited storage space on your device. It can significantly help prevent sending too large files via email, social media platforms, or share to other devices. Moreover, you can think of a way to minimize the large files to make them smaller. In this article, you will learn how file size with GB, MB, KB, which file size takes too much space on the computer system. Also, you can find some methods to compress GB files to make smaller file sizes without losing quality.

Introductions to the File Size: Bytes, KB, MB, and GB

The memory compromises many decisive circuits that can be either off or on and are represented by 0 or 1. Counting higher than 1, you need to use bits and bytes to form larger numbers, resulting in KiloBytes (KB) or MegaBytes (MB). For specific measurements for type of bytes, read further to know the difference of Bytes.

What is Byte?

A byte is a unit of data that is eight bits long (BInary digiTS), and computer systems use this unit to represent a character like a number, letter, or other symbols such as $. It is the smallest unit of information that a computer can process. A byte can also hold a string needed in some large units of the application process, including KB, MB, and GB. The best example is the stream of bits composing the machine code of a computer program.


The measurement system of a byte is different for every country. However, the most accepted measure for byte is eight bits.

What is KB?

A KB or Kilobyte is a smaller unit of memory measurement but more extensive than a byte. A Kilobyte is composed of 1024 bytes, and it is synonymously used as kibibytes which are 1,024 bytes. A simple text document is an excellent example as it often uses 10KB and only takes small storage space.

What is MB?

A Megabyte is abbreviated as MB contains 1,000,000 bytes, and is equal to 1,024 kilobytes. Mainly, megabytes are used to measure large files. You can compare it to a JPEG image with high resolution that can range from 1 to 5 MB in size, or compressed audio with a 3-minute duration can be roughly 3MB in size.

What is GB?

A GB(Gigabyte) is measured with 1,024 Megabytes and 1,000,000,000 bytes. It is also abbreviated as gigs, and what's more, it is used synonymously with gibibytes composed of exactly 1,073,741,824 bytes. Gigabyte is used to measure a device's storage capacity like a standard DVD drive which holds 4.7Gigabytes of data.

Which is Bigger? KB, MB, or GB?

1. Comparison between KB, MB, and GB

From the explanation above about the memory unit measurements, it is obvious to know that Gigabytes are bigger than Megabytes and Kilobytes. However, you can precisely see the difference in these unit measurements in the table below:

GB vs. MB vs. KB File Size
1 Kilobyte (KB) =1024 bytes
1 Megabyte (MB) =1024 KB/ 1,048,576 bytes
1 Gigabyte (GB) =1024 MB/ 1,073,741,824 bytes

In short, KB is the smallest, and GB is the biggest among those 3 items. The correct order from smallest to largest is KB, MB, GB. Or you can check this: 1 GB = 1024 MB = 1,048,576 KB.

2. Difference between the KB, MB, and GB photos and videos

Even when you learn about the importance of memory measurement, the file size should be considered when you download or store files. You also need to make sure that the greater the file size is, the more it takes storage space. For photo quality, it is well recommended to keep files size under 100KB. For video, it is good to consider the duration, bitrate, and resolution of the video. For example, if you have a 2.5-hour long video with 1080p resolution, you can roughly store it to 1GB.

If you have files that are way too large for your storage space, you can use software that will help to reduce the file size without losing too much quality. But which is the best tool to compress GB video files to MB? Please keep reading!

The Best Way to Compress GB Videos to MB with High Quality

AnyRec Video Converter is a professional tool with multiple functions. It offers a video compressor to reduce the file size while maintaining the quality. The interface is straightforward to navigate; even beginners can learn in a few seconds. With the help of GPU acceleration, this video compressor enables it to convert at a faster speed to compress files with sizes of MB or GB. Moreover, it allows you to manipulate the video settings to achieve the size and quality of the video file.

AnyRec Video Converter Package
AnyRec Video Converter:

Compress large video files without losing too much quality.

Convert video to MP4 and other lossy formats to reduce file size.

Crop, trim, and edit your videos to make it smaller.

Improve video quality, remove watermark, and get more tools.

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How to compress video files with MB on AnyRec Video Converter:

Step 1.Open AnyRec Video Converter. Locate the "Toolbar" button on the top part of the pane to start video compressing. Among the tool options, click the "Video Compressor" button. Click the "Add" button to select the video file you want to reduce from 1GB to 500MB, 200MB, 100MB, 10MB or even smaller.

Choose The Video Compressor

Step 2.Move the "Size" slider to compress video size by percentage or certain file size. Change video resolution and bitrate to shrink file size if necessary. Click the "Preview" button to watch the first 10 seconds of the video file. If the video is blurry, you can re-adjust video compression ratio and settings manually.

Compress Videos To Desired Size

Step 3.Browse on the "Save To" option to choose the destination folder of the compressed file. After that, click the "Compress" button on the lower part of the pane to start compressing MP4 videos.

Save Compressed Videos


You can change video formats from lossless to lossy (such as MP4) one to reduce video size too. Moreover, you can trim or crop unwanted clips from your video to make a video smaller. Though the latter solution will remove some video content. Whatever, you can get full features about GB, MB, KB switching within AnyRec Video Converter.

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FAQs about KB, MB, and GB File Size


The unit measurements are KB, MB, and GB that are formed with millions of bits or Binary Digits. These measurements are bound to hold essential data like video, audio, document, and more. Having a large file is possible to reduce the file size when you use a video compressor like AnyRec Video Converter. Share this knowledge to your friends now!

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