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Is 1GB equal to 1000MB or 1024MB? Whenever I use google to convert it, I get 1000, but on multiple Q&A sites, I see 1024. Which is it? Please do not say 'It depends on the situation'. I want a real answer. Google Answer. Online Converter.

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A gigabyte is 109 byte = 1 000 000 000 byte. Which is shortended GB

The Giga-prefix means 109, but has in the computer science-world meant 230. Gibi- is a new prefix, that means 2^30. This is often shortened as GiB. IEC reccomends using gibibyte, for describing data-amounts, that are measued as a multiplication of 230 byte.

Edit: Although, as you point out in the image from wikipedia in the comments, JEDEC does recommend using the binary GB (230), instead of the decimal.

Source:
https://en.wikipedia.org/wiki/IEC_80000-13#Prefixes_for_binary_multiples

Wai Ha Lee
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