Answers.Body: <p>8K = 8000 x 8000, if 1:1. But you normaly have 16:9 for videos which is 7680 * 4320, since 7680 ≈ 8000, the width is rounded to 8K, if 9:16 aspect ratio, then the height is rounded to 8K.</p>
  <hr />
  <p>7680 * 4320 = 33177600 which is 33MegaPixels, since 33177600 ≈ 33 Million Pixels.</p>
  <hr />
  <p>33 / 4 ≈ 8. 8MP is 4K when 16:9 aspect ratio. Since 3840×2160 = 8294400 ≈ 8 Million pixels. The reason it's Mega is because Mega is a greek word and means 10^6 which is Million.</p>
  <hr />
  <p>So 1080p is easy since 1920 x 1080 ≈ 2MP. Since 2 073 600 is ≈ 2 Million.</p>
  <hr />
  <p>What is then 2MP x 16? It's 32MP. 8K on an 16:9 Aspect ratio is ≈ 33MP, but on an 2:1 Aspect ratio it would be 32MP, since 8K x 4K would be 32 Million.</p>
  <hr />
  <h2>Let's do a final calculation.</h2>
  <p>8K x 4K (8K) = 32MP.</p>
  <p>4K x 2K (4K) = 8MP.</p>
  <p>2K x 1K (2K, at 16:9 it's called 1080p) = 2MP.</p>
  <p>2 x 4 = 8</p>
  <p>8 x 4 = 32.</p>
  <p>4 x 4 = 16.</p>
  <p>So 16 times since you multiply the width with 4 and the height with 4.</p>
  <p>(x<em>4) * (y</em>4).
  at 2K with aspect ratio of 16:9:
  x would be width, so x is 1920,
  y would be height, so y is 1080.</p>
  <p>(1920 * 4) * (1080 * 4)= 7680 * 4320 = 33177600 ≈ 33MP</p>
  <p>So as you can see 7680 * 4320 is called 8K.</p>
  <hr />
  <p><a href="https://en.wikipedia.org/wiki/8K_resolution" rel="nofollow noreferrer">https://en.wikipedia.org/wiki/8K_resolution</a></p>
  
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Answers.Body: <p>First off, 2K is not 1440p, it is 2048 x 1080p.  4K is 4096 x 2160p.  (Note that UHD = 3840 x 2160p...4K and UHD are like US and Canadian dollars--they are both dollars, but they have different values.)</p>
  
  <p>It's simple math: when you have a straight line and you make it twice as long, the new length is 2x the original length.  When you have a rectangular area and you double both the length and the width in order to keep the same aspect ratio, the new area = (2L) * (2W) = 4 * (L*W)</p>
  
  <p>When you double something twice, you do it again:</p>
  
  <p>2*(2L) * 2*(2W) = 4 * 4 * (L*W) = 16 * (L * W)</p>
  
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Answers.Text: Ah, I get that now. 2k 4k are based on horizontal length only, rather than number if pixels. This had me confused, as I had assumed 8k would be 1080p *sqrt(8). Thanks
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Body: <p>Considering 2K = 1440p, has twice the pixels compared to 1080p, 4k has four times as many, why does 8k not follow this trend? </p>
  
Tags: <4k><aspect><memory>
Title: Why does 8K have 16 times the pixels compared to 1080p?
UserDisplayName: xyz
ThreadText: # Why does 8K have 16 times the pixels compared to 1080p?
  
  (Asked by: username_0 on 2016-04-03)
  
  Considering 2K = 1440p, has twice the pixels compared to 1080p, 4k has four times as many, why does 8k not follow this trend?
  
  **Tags:** 4k, aspect, memory
  
  
  ---
  
  ## 2 answers
  
  ### Answer by username_2 on 2016-04-04. Score: 4 | Accepted answer
  
  First off, 2K is not 1440p, it is 2048 x 1080p. 4K is 4096 x 2160p. (Note that UHD = 3840 x 2160p...4K and UHD are like US and Canadian dollars--they are both dollars, but they have different values.)
  
  It's simple math: when you have a straight line and you make it twice as long, the new length is 2x the original length. When you have a rectangular area and you double both the length and the width in order to keep the same aspect ratio, the new area = (2L) \* (2W) = 4 \* (L\*W)
  
  When you double something twice, you do it again:
  
  2\*(2L) \* 2\*(2W) = 4 \* 4 \* (L\*W) = 16 \* (L \* W)
  
  > **Comments:**
  > **username_0**: Ah, I get that now. 2k 4k are based on horizontal length only, rather than number if pixels. This had me confused, as I had assumed 8k would be 1080p *sqrt(8). Thanks  
  
  ---
  
  ### Answer by username_1 on 2022-09-05. Score: 1
  
  8K = 8000 x 8000, if 1:1. But you normaly have 16:9 for videos which is 7680 \* 4320, since 7680 ≈ 8000, the width is rounded to 8K, if 9:16 aspect ratio, then the height is rounded to 8K.
  
  ---
  
  7680 \* 4320 = 33177600 which is 33MegaPixels, since 33177600 ≈ 33 Million Pixels.
  
  ---
  
  33 / 4 ≈ 8. 8MP is 4K when 16:9 aspect ratio. Since 3840×2160 = 8294400 ≈ 8 Million pixels. The reason it's Mega is because Mega is a greek word and means 10^6 which is Million.
  
  ---
  
  So 1080p is easy since 1920 x 1080 ≈ 2MP. Since 2 073 600 is ≈ 2 Million.
  
  ---
  
  What is then 2MP x 16? It's 32MP. 8K on an 16:9 Aspect ratio is ≈ 33MP, but on an 2:1 Aspect ratio it would be 32MP, since 8K x 4K would be 32 Million.
  
  ---
  
  ## Let's do a final calculation.
  
  8K x 4K (8K) = 32MP.
  
  4K x 2K (4K) = 8MP.
  
  2K x 1K (2K, at 16:9 it's called 1080p) = 2MP.
  
  2 x 4 = 8
  
  8 x 4 = 32.
  
  4 x 4 = 16.
  
  So 16 times since you multiply the width with 4 and the height with 4.
  
  (x*4) \* (y*4).
  at 2K with aspect ratio of 16:9:
  x would be width, so x is 1920,
  y would be height, so y is 1080.
  
  (1920 \* 4) \* (1080 \* 4)= 7680 \* 4320 = 33177600 ≈ 33MP
  
  So as you can see 7680 \* 4320 is called 8K.
  
  ---
  
  <https://en.wikipedia.org/wiki/8K_resolution>
  
  
  ---
  
  