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数据大小转换器

免费数据大小转换器 — 字节、KB、MB、GB、TB、PB。包括十进制 (1000) 和二进制 (1024 / KiB, MiB) 单位。带宽、文件大小、存储。

Runs in your browser

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Understanding · Why 1024 instead of 1000.

本深度章节目前仅有英文版本。上方的转换工具支持您的语言;长篇说明文章尚未翻译。

常见问题

Quick answers.

Why does my 1 TB hard drive show as 931 GB?

Drive vendors use decimal terabytes (10¹² bytes) but operating systems show binary (2⁴⁰ bytes, properly called TiB). 1 TB = 0.909 TiB.

What's the difference between MB and MiB?

1 MB = 1,000,000 bytes (decimal). 1 MiB = 1,048,576 bytes (binary). They differ by about 5%, growing with every prefix.

How many bits in a byte?

Almost always 8. The convention is so universal that 'octet' (= 8 bits) is sometimes used in network specs to be unambiguous.

Bytes to gigabytes — how?

Divide by 1,000,000,000 for decimal GB or by 1,073,741,824 for binary GiB. Or type your value and pick the units.

Is the converter free?

Yes — free, no ads, runs in your browser.

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