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My macbook has 16GB RAM, but when I check my computer's total bytes with NodeJS or Go it reports 17179869184 bytes.

If I look at Google's calculator (e.g. do a google search "convert bytes to gb") it says:

  • For GB divide bytes by 1e+9
  • For MB divide bytes by 1e+6

The Google search calculators therefore give 17.179869184 GB and 17179.869184 MB.

However I've also seen the formula as:

  • For GB divide bytes by 1024 / 1024 / 1024
  • For MB divide bytes by 1024 / 1024

Which results in 16384 MB and exactly 16GB.

Which calculation is correct? Is my macbook 16GB or 17GB? Thanks.

marked as duplicate by music2myear, harrymc, DavidPostill Mar 19 at 20:29

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migrated from serverfault.com Mar 19 at 20:10

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  • 3
    Your MacBook has 16GB of RAM. Binary prefix was created to remove confusion. Gibibyte is the correct term in SI system. In computer world this is still called Gigabyte. – Aulis Ronkainen Mar 19 at 20:22
  • 1
  • Ah of course! Thought it would be something simple. Thanks & feel free to answer or close as dupe I lack the power – Dominic Mar 19 at 20:26

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