将字节转换为兆字节 [英] Converting bytes to megabytes

问题描述

我已经看到了三种从字节到兆字节的转换方式:

I've seen three ways of doing conversion from bytes to megabytes:

1. megabytes = bytes/1000000
2. megabytes = bytes/1024/1024
3. megabytes = bytes/1024/1000

好的，我认为#3完全错误，但是我已经看到了.我认为#2是正确的，但我正在寻找一些受人尊敬的权威机构(例如W3C，ISO，NIST等)来澄清哪个兆字节是真正的兆字节.任何人都可以引用明确说明此计算过程的信息来源吗?

Ok, I think #3 is totally wrong but I have seen it. I think #2 is right, but I am looking for some respected authority (like W3C, ISO, NIST, etc) to clarify which megabyte is a true megabyte. Can anyone cite a source that explicitly explains how this calculation is done?

奖金问题:如果#2是兆字节，那么#1和#3叫什么?

Bonus question: if #2 is a megabyte what are #1 and #3 called?

顺便说一句:硬盘驱动器制造商不算这方面的权威！

BTW: Hard drive manufacturers don't count as authorities on this one!

推荐答案

传统上，以兆字节为单位表示您的第二个选择-1兆字节= 2 ²⁰ 字节.但这实际上是不正确的，因为兆表示1000000.有一个新的标准名称，表示2 ²⁰ 字节，即兆字节(

Traditionally by megabyte we mean your second option -- 1 megabyte = 2²⁰ bytes. But it is not correct actually because mega means 1 000 000. There is a new standard name for 2²⁰ bytes, it is mebibyte (http://en.wikipedia.org/wiki/Mebibyte) and it gathers popularity.

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