8K Video Storage: How Much Space Does It Need?

8K video storage depends mainly on bitrate, codec, frame rate, and recording time: at 100 Mb/s, one minute uses about 750 MB, while an hour uses about 45 GB. Enter a video’s bitrate and duration to estimate its size; the result is a planning estimate, not a guarantee of the space a camera or editing app will use.

Formula

For a video stream, storage in decimal gigabytes is bitrate in megabits per second multiplied by recording time in seconds, then divided by 8 to convert bits to bytes and by 1,000,000,000 to convert bytes to GB. With time entered in minutes, the formula is: GB = bitrate (Mb/s) × minutes × 60 ÷ 8 ÷ 1,000. The companion result in binary gibibytes is GiB = bitrate (Mb/s) × minutes × 60 ÷ 8 ÷ 1,024.

• Bitrate: the average data rate, in megabits per second (Mb/s).
• Minutes: recording duration, in minutes.
• GB: decimal gigabytes, where 1 GB = 1,000,000,000 bytes.
• GiB: binary gibibytes, where 1 GiB = 1,073,741,824 bytes.

The calculator assumes one constant bitrate and calculates video-stream data only. Audio, container metadata, variable bitrate changes, and file-system overhead can alter the actual file size.

Worked Example

Using the defaults of 100 Mb/s and 1 minute:

1. Convert the duration to seconds: 1 × 60 = 60 seconds.
2. Convert megabits to megabytes: 100 Mb/s × 60 seconds ÷ 8 = 750 MB.
3. Convert decimal megabytes to gigabytes: 750 ÷ 1,000 = 0.75 GB.
4. Convert the same bytes to GiB: 750 ÷ 1,024 = 0.73 GiB when rounded to two decimals.

At the same bitrate, a 10-minute recording is about 7.50 GB, and an hour is about 45.00 GB. These figures scale directly with duration and bitrate.

Why 8K Does Not Set the File Size

8K describes image dimensions, not a fixed amount of data per second. A common 8K UHD frame is 7680 × 4320 pixels, but two recordings with those dimensions can have very different file sizes. Frame rate, image detail, bit depth, chroma sampling, compression settings, and the codec all affect the bitrate needed to represent the footage.

Higher frame rates generally require more data because more frames must be encoded each second. Complex, noisy, or rapidly changing scenes may also need a higher variable bitrate than a static scene at the same quality setting. Compression can reduce storage substantially, but stronger compression may involve a quality trade-off, and editing or re-encoding can change the result.

For that reason, “8K video uses X GB per minute” is not universally true. Use the bitrate reported by the camera, recording software, or a representative test clip when available. If the device gives a range or uses variable bitrate, use a high-end figure for safer capacity planning.

Estimate Recording Time and Choose Capacity

To estimate how long a drive can hold footage, divide its usable capacity by the expected storage per minute. For example, at 100 Mb/s, a nominal 1 TB drive could theoretically hold about 22.2 hours of video before allowing for other files or overhead: 1,000 GB ÷ 45 GB per hour ≈ 22.2 hours. In practice, available recording time is lower because a drive is not entirely free space and the video may include audio and other data.

• Check the camera’s bitrate or record a short clip and inspect its size.
• Estimate the total duration of planned recording, including retakes and extra footage.
• Add a practical buffer for audio, metadata, bitrate variation, and other files.
• Check the recording device’s supported card or drive capacity and required write speed.
• Keep a separate backup when the footage matters; a storage estimate does not protect against drive failure or accidental deletion.

Manufacturers label storage in decimal units, while some operating systems display capacity using binary units or label them inconsistently. A drive sold as 1 TB contains 1,000,000,000,000 bytes, which is about 931 GiB. The difference is a unit convention, not necessarily missing capacity.

Bitrate, Codec, and Real-World File Size

Bitrate is usually the most useful input for a quick estimate. If a recording format is described by a data rate in megabits per second, the calculator converts that rate directly into an approximate file size. Do not confuse megabits (Mb) with megabytes (MB): eight bits make one byte, so 100 Mb/s is 12.5 MB/s before other streams and overhead.

Codec names alone do not reveal an exact file size. A codec is a method for encoding video; its efficiency and the selected quality settings influence how much data is needed. The same codec can produce different file sizes at different bitrates or quality levels. Likewise, a camera’s “high quality” setting is not a precise storage unit unless its bitrate is specified.

Some devices record variable-bitrate video, adapting data use to the scene. In that case, the calculator’s fixed-rate result is an average estimate if you enter an average bitrate. A short sample clip is often more representative: divide its file size by its duration, then use that average rate to project longer recordings.

Common Storage Planning Mistakes

The most frequent calculation error is treating Mb/s as MB/s and skipping the division by eight. Another is mixing decimal GB with binary GiB; the difference grows as files get larger. Rounding a per-minute estimate too early can also make a long recording projection noticeably inaccurate, so keep the full value until the final result.

Remember that a camera may split recordings into multiple files, and the storage medium must sustain the recording’s write rate. Capacity alone does not establish compatibility or performance. Check the device documentation for supported media and required speed class, and avoid filling a recording drive to its limit. If estimating an entire production, include separate audio tracks, proxies, exports, and backups rather than counting only the original camera files.

Frequently Asked Questions

How many GB is one minute of 8K video?
There is no single fixed amount. At 100 Mb/s, one minute is about 0.75 GB of video data; at another bitrate, multiply that bitrate by 60 and divide by 8,000 to get decimal GB.

How much storage does one hour of 8K video need?
At 100 Mb/s, allow roughly 45 GB for the video stream. The actual recording can be larger or smaller depending on its bitrate, audio, and file overhead.

Does 8K always take four times as much storage as 4K?
No. 8K has four times as many pixels per frame as 4K UHD, but file size also depends on frame rate, codec, compression, and bitrate. It is not automatically four times larger.

How do I find a video’s bitrate?
Look in the camera or recording software’s format settings, or inspect a recorded file with a media information tool. If you know the file size and duration, you can estimate average bitrate by converting the file size to bits and dividing by seconds.

Why does my drive show less space than its label?
Drive labels generally use decimal units, while some systems report binary units. A labeled 1 TB is about 931 GiB, before any space used by formatting or existing files.

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in bitrate | Video bitrate | Mb/s | 100 | 0
in minutes | Recording time | min | 1 | 0
out storage | Estimated storage | GB | bitrate * minutes * 60 / 8 / 1000 | 2
out storage_gib | Estimated storage | GiB | bitrate * minutes * 60 / 8 / 1024 | 2