In the era of outstanding picture quality and resolution, 4k contents are the new trend. 4k videos are no more something unusual or fancy in 2022. But you need to know how much 4k video can 128 GB hold before downloading them.

The formula for calculating a 4k video size lies in this equation – “One frame size = The number of pixels x One-pixel size”. If I simplify, a 128 GB SD card can hold up to 4.5 to 5 hours of 4k videos (if it is based on 60 fps) in general.

Here, in this article, I’ll comprehend it briefly. Go through the article below to learn more.

How to Calculate 4K Video Size?

In this portion of the article, we’ll tell you about the process of calculating the size of 4k videos. If you’ve researched the basic stuff about the video, you’ll know that a video consists of multiple images. Technically, a video is an addition of several images. 

The formula for calculating a 4k video size lies in knowing one frame size. 

One frame size= The number of pixels x one-pixel size.

If we take 4k resolution, for example, it’ll be 4096 x 2160. And if we take 8 bits for each channel as an example, the size of one frame comes up as 4096 x 2160 x 8 = 70778880 bits. If you turn the bits into bytes, the calculation becomes much easier for you. 

8 bits = 1 byte

1024 bytes = 1 kilobyte

1024 kilobytes = 1 megabyte

Which means 7077880 bits equals 7077880/ (8 x 1024 x 1024) = 8.43 MB. 

How much 4k video can a 128gb SD card hold?

The number of 4k videos you can store in your memory card depends on its storage space. If we talk about 128 GB SD cards, they can hold up to 4.5 hours of 4k videos. It is just an estimation. How much 4k video can 128gb hold also depends on the brand of memory card you’ve purchased. And on the technology the brand has used.

A random 128 GB memory card can hold 76 videos. That is based on a 4k resolution at 60fps. That is a standard GoPro video resolution. 3 minutes is an average video duration in this case. 

Besides, it depends on the 4k bitrate stream. In maximum recording devices, 100 Mbit per second is very common. We also find 200 Mbit/s nowadays. To calculate it, you have to find out the bitrate of the card. 

The bitrate of 128 GB stands 128 x 1000 = 128000 

Now, let’s divide by the bitrate in Mbytes per second. 

128000/12.5= 10240 seconds. And 10240 seconds are 10240/3600 = 2 hours 50 minutes in decimal form.

And 256 GB memory cards hold up to 153 videos approximately. Now you know how much 4k video can 256gb hold. 

If you have a 64 GB memory card, you’d probably like to know how much 4k video can 64gb hold. A 64 GB memory card can store up to 38 videos that are in 4k resolution. 

Now let’s talk about how much 4k video can 32gb hold. With a memory card that comes with a storage space of 32 GB, you can save 4k videos of up to 1 hour 21 minutes.

What Are the Factors That Decide the Size of A 4K Video?

Video resolution, frame rate, bit rate, codec, bit control mode (macroblock), bit depth (color dept) are the focal factors that decide the size of a 4K video.

Resolution means a group of still images at a certain speed. This resolution is equal to pixel counting. The total pixel of a 4K video is 3840*2160=8294400 pixels. 

The higher the pixels, the better the video quality and the more size you will need. If you are interested in making a video for an hour, you might need to spend almost 42GB of your memory. Hence, to explore 4K videos, it’s better to take a large-spaced hard disk with you.

If you’re recording a movie at 24 fps, it’ll look smoother than ever. Games and sports videos contrarily will look very choppy and harsh in it. Which means there is no exact frame rate that is perfect for all types of videos. Usually, films get broadcast at 24 fps and news in 30 fps. If you increase the frame rate, the video will get crispier. 

Now arrives the question, how much memory do I need for 4k video?

That depends on how many hours of 4k videos do you want to store in your SD card. If you are willing to store 4k videos of 1-hour duration,110 GB memory space is enough. You can also keep them in a less spacious memory card. You’ll have to curtail the video duration for that.


We’ve reflected on some of the substantial facts about a 4k video that you got to know. In this era of extravagant pixels and resolutions, not knowing how much 4k video can 128gb hold is a sunk cost. If you’re an amateur when it comes to technical stuff, this article can help you. You can figure out how to calculate the size of 4k videos once you go through this article. Let us know if this article comes in handy!

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Team Everything4K is a bunch of tech enthusiasts and researchers. The team is very interested in the relevant hardware and explain in such a way that reader can get the best experience of playing games in a 4K setup. You know that 4K is the future of display technology. And the credit of explaining rough and tough tech terms easily goes to Team Everything4K.

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