数据传输速率换算器（Mbps 转 MB/s）

将 Mbps 换算为 MB/s、Gbps 换算为 MB/s、kbps 换算为 kB/s。网络速度以比特每秒表示；文件大小和下载计量以字节表示。

更新于 2026年9月29日已验证的示例：4

转换后的数值

MB/s

有效数字：12；取最近值，等距时远离零

换算: 100 Mbit/s = 12.5 MB/s
换算系数: 0.125
精确性: 精确

100 Mbit/s精确等于12.5 MB/s。一个兆比特每秒精确等于0.125 MB/s。

用各个单位表示同一个量

100 Mbit/s用各个数据传输单位表示行数：12

单位	数值	定义
bit per second (bit/s)	100,000,000	基本单位
kilobit per second (kbit/s)	100,000	1 kbit/s = 1,000 bit/s，精确值
兆比特每秒 (Mbit/s)	100	1 Mbit/s = 1,000,000 bit/s，精确值
gigabit per second (Gbit/s)	0.1	1 Gbit/s = 1,000,000,000 bit/s，精确值
terabit per second (Tbit/s)	0.0001	1 Tbit/s = 1,000,000,000,000 bit/s，精确值
byte per second (B/s)	12,500,000	1 B/s = 8 bit/s，精确值
kilobyte per second (kB/s)	12,500	1 kB/s = 8,000 bit/s，精确值
兆字节每秒 (MB/s)	12.5	1 MB/s = 8,000,000 bit/s，精确值
gigabyte per second (GB/s)	0.0125	1 GB/s = 8,000,000,000 bit/s，精确值
kibibyte per second (KiB/s)	12,207.03125	1 KiB/s = 8,192 bit/s，精确值
mebibyte per second (MiB/s)	11.92093	1 MiB/s = 8,388,608 bit/s，精确值
gibibyte per second (GiB/s)	0.01164153	1 GiB/s = 8,589,934,592 bit/s，精确值

计算方法 S

将兆比特每秒换算为bit per second
$100\ \text{Mbit/s} \times 1{,}000{,}000\ \tfrac{\text{bit/s}}{\text{Mbit/s}} = 100{,}000{,}000\ \text{bit/s}$
1 Mbit/s = 1,000,000 bit/s，精确值
将bit per second换算为兆字节每秒
$100{,}000{,}000\ \text{bit/s} \div 8{,}000{,}000\ \tfrac{\text{bit/s}}{\text{MB/s}} = 12.5\ \text{MB/s}$
1 MB/s = 8,000,000 bit/s，精确值
合并换算系数
$1\ \text{Mbit/s} = \frac{1{,}000{,}000}{8{,}000{,}000}\ \text{MB/s} = 0.125\ \text{MB/s}$
两个单位的定义都精确，且换算结果为有限小数，因此显示的每一位数字都精确。

关于数据传输速率换算器（Mbps 转 MB/s）

Network speeds are quoted in bits per second and file sizes in bytes, and a byte is 8 bits, so megabits per second divide by 8 to give megabytes per second. Each rate unit is a fixed number of bits per second, with decimal prefixes (1 Mbit/s = 10⁶ bit/s) kept apart from binary ones (1 MiB/s = 2²⁰ bytes per second).

The default converts a 100 Mbit/s broadband plan to 12.5 MB/s, the most a download can show in megabytes per second, or 11.92 MiB/s in a program that counts in binary units. A 1 Gbit/s connection tops out at 125 MB/s.

Real transfers run below the line rate because every packet carries headers: over Ethernet with TCP/IPv4, at most 1,460 of every 1,538 bytes on the wire are data, 94.9%. The download time calculator applies that overhead to a file size.

计算示例

100 Mbit/s in MB/s

数值: 100 Mbit/s
从: megabit per second (Mbit/s)
到: megabyte per second (MB/s)

转换后的数值: 12.5 MB/s

核验来源：100 × 10⁶ bit/s ÷ 8 bit/B ÷ 10⁶ = 12.5

1 Gbit/s in MB/s

数值: 1 Gbit/s
从: gigabit per second (Gbit/s)
到: megabyte per second (MB/s)

转换后的数值: 125 MB/s

核验来源：10⁹ / 8 / 10⁶ = 125

1 MiB/s in Mbit/s

数值: 1 MiB/s
从: mebibyte per second (MiB/s)
到: megabit per second (Mbit/s)

转换后的数值: 8.388608 Mbit/s

核验来源：2²⁰ × 8 / 10⁶ = 8.388608

1 bit/s in kB/s (tiny value)

数值: 1 bit/s
从: bit per second (bit/s)
到: kilobyte per second (kB/s)

转换后的数值: 0.000125 kB/s

核验来源：1 / 8 / 1000 = 0.000125

常见问题

How many MB/s is 100 Mbps?

12.5 MB/s. Divide megabits per second by 8, because a byte is 8 bits: 100 ÷ 8 = 12.5. Programs that count in binary units show 11.92 MiB/s for the same speed, and protocol overhead takes about another 5%, so expect around 11.9 MB/s on a wired 100 Mbit/s link.

What is the difference between Mbps and MBps?

Mbps (Mbit/s) is megabits per second; MBps (MB/s) is megabytes per second, 8 times larger. Internet plans and Wi-Fi speeds are sold in Mbps, while browsers and download managers usually show MB/s, so a 50 Mbps plan appears as 6.25 MB/s. The case of the b is the only visible difference.

How fast is 1 Gbps in MB/s?

125 MB/s: 1,000,000,000 bits ÷ 8 = 125,000,000 bytes per second, which is 119.21 MiB/s in binary units. At that rate a 50 GB download takes 400 seconds, 6 min 40 s, before protocol overhead is added.

Why is my download slower than my internet speed?

Part of the gap is units and part is overhead. A plan quoted at 100 Mbit/s is 12.5 MB/s at most, and TCP/IP and Ethernet headers use about 5% of that, leaving about 11.9 MB/s. Wi-Fi signal, the far server and other devices on the connection reduce it further, which this converter does not model.

How many Mbps is 1 MiB/s?

8.388608 Mbit/s. One MiB/s is 1,048,576 bytes per second, and 1,048,576 × 8 = 8,388,608 bits per second. A tool that reports MiB/s therefore shows a number 4.6% lower than the same speed in MB/s.

“数据传输速率换算器（Mbps 转 MB/s）”有多准确？

准确性取决于输入值和方法的假设。十进制运算使用50位有效数字，但估算、数值方法和源数据的精度可能较低；显示时的舍入并不能消除这些限制。已按独立来源核验的计算示例：4。例如，“100 Mbit/s in MB/s”根据100 × 10⁶ bit/s ÷ 8 bit/B ÷ 10⁶ = 12.5进行核验。

这种方法出自哪里？

NIST SP 811 (2008), Guide for the Use of the SI, Appendix B — conversion factors; NIST Handbook 44, Appendix C — General tables of units of measurement; NIST — Prefixes for binary multiples (IEC 80000-13).

关于此计算器

\begin{gathered} x_{\text{to}} = x_{\text{from}} \times \dfrac{f_{\text{from}}}{f_{\text{to}}} \\ f = \text{one unit expressed in } \text{bit/s} \end{gathered}

来源

已对照来源验证

此计算器包含 4 个已解示例，答案来自独立来源。这些示例会在测试套件中运行，你也可以在此运行验证。