units - Conversion between GB and MB (and KB)

UnitConvert[Quantity[1, "GB"], "MB"]

Quantity[1000, "Megabytes"]

Which is NOT something we would normally expect. Is this a bug?

How can I use 1024MB = 1GB for the calculation?

Thanks.

Answer

You need to use 'better' units:

UnitConvert[Quantity[1, "GiB"], "MiB"]

Quantity[1024, "Mebibytes"]

See explanation and definitions in https://en.wikipedia.org/wiki/Gigabyte