Data Rate Converter (Mbps to MB/s)
Bits per second to bytes per second and back — 100 Mbps is 12.5 MB/s.
Type a speed in plain words — “100 Mbps to MB/s”, “1 Gbit/s in MiB/s”, “25 MB/s to Mbps”, “5 Mbps to GB/h” — or use the boxes below.
Exact · MB/s = Mbit/s × 0.125 · 1 Mbit/s = 0.125 MB/s
- Megabit per second: 1,000,000 bit/s — broadband and mobile plans (“Mbps”) use this unit
- Megabyte per second: 1,000,000 bytes per second = 8 Mbit/s
100 Mbit/s in every unit
Select a unit to convert to it. Values marked ≈ are rounded; all others are exact.
| Unit | Value | Copy |
|---|---|---|
| Bits per second | ||
| 10,00,00,000 | ||
| 1,00,000 | ||
| from | 100 | |
| 0.1 | ||
| 0.0001 | ||
| Bytes per second, decimal | ||
| 1,25,00,000 | ||
| 12,500 | ||
| to | 12.5 | |
| 0.0125 | ||
| Bytes per second, binary | ||
| 12,207.03125 | ||
| 11.920928955078125 | ||
| ≈ 0.01164153218 | ||
| Per hour | ||
| 45 | ||
Convert a list of values
Up to 1,000 lines. Fractions (3/4), mixed numbers (1 1/2) and grouped digits (1,250) are fine.
| Value | Result |
|---|
Nominal speeds of USB, Ethernet and Wi-Fi
Maximum rates on the wire, before encoding and protocol overhead — a real copy or download is slower. Select a link to load its speed into the converter.
| Link | Nominal rate | ÷ 8 = MB/s |
|---|---|---|
| USB Signalling rates from the USB specifications; the first column is the name USB-IF recommends for packaging. | ||
| USB4 Version 2.0 (Gen 4) up to 120 Gbit/s in one direction (asymmetric mode) | 80 Gbit/s | 10,000 MB/s |
| USB4 (Gen 3 × 2) | 40 Gbit/s | 5,000 MB/s |
| USB 3.2 Gen 2 × 2 | 20 Gbit/s | 2,500 MB/s |
| USB 3.2 Gen 2 (first in USB 3.1) | 10 Gbit/s | 1,250 MB/s |
| USB 3.2 Gen 1 (first in USB 3.0) | 5 Gbit/s | 625 MB/s |
| USB 2.0 high-speed | 480 Mbit/s | 60 MB/s |
| USB full-speed | 12 Mbit/s | 1.5 MB/s |
| Ethernet IEEE 802.3 data rates; the number in each name is the rate (1000BASE-T = 1,000 Mbit/s). | ||
| 10GBASE-T | 10 Gbit/s | 1,250 MB/s |
| 5GBASE-T | 5 Gbit/s | 625 MB/s |
| 2.5GBASE-T | 2.5 Gbit/s | 312.5 MB/s |
| 1000BASE-T | 1 Gbit/s | 125 MB/s |
| 100BASE-TX | 100 Mbit/s | 12.5 MB/s |
| 10BASE-T | 10 Mbit/s | 1.25 MB/s |
| Wi-Fi Highest link rate with 2 spatial streams (as many phones and laptops have) on the widest channel; real throughput is lower. | ||
| IEEE 802.11be, 320 MHz, 2 streams 2,882.4 Mbit/s per stream; the standard allows 8 streams (23,059 Mbit/s) | ≈ 5.765 Gbit/s | ≈ 720.6 MB/s |
| IEEE 802.11ax, 160 MHz, 2 streams 1,201 Mbit/s per stream; the standard allows 8 streams (9,608 Mbit/s) | ≈ 2.402 Gbit/s | ≈ 300.2 MB/s |
| IEEE 802.11ac, 160 MHz, 2 streams 866.7 Mbit/s per stream; the standard allows 8 streams (6,933 Mbit/s) | ≈ 1.733 Gbit/s | ≈ 216.7 MB/s |
| IEEE 802.11n, 40 MHz, 2 streams 150 Mbit/s per stream; the standard allows 4 streams (600 Mbit/s) | 300 Mbit/s | 37.5 MB/s |
Sources: USB 2.0, USB 3.2 and USB4 specifications and USB-IF naming guidelines (usb.org); IEEE 802.3; Wi-Fi Alliance generation names.
About the Data Rate Converter (Mbps to MB/s)
Convert a speed in bits per second — the unit of internet plans, Ethernet, Wi-Fi and USB — into bytes per second, the unit download managers and copy dialogs show, and back again. Every rate from bit/s to Tbit/s, B/s to GB/s, the binary KiB/s, MiB/s and GiB/s, and GB per hour for streaming are converted exactly, so 100 Mbit/s is exactly 12.5 MB/s and 1 MiB/s is exactly 8.388608 Mbit/s.
Under each result you also get the binary equivalent and the best-case time to move 1 GB at that speed. A reference table lists the nominal speeds of USB, Ethernet and Wi-Fi with the names printed on boxes, and loads any of them into the converter.
How to use it
- Type a speed in From and pick its unit (for example 100 and Mbit/s), then pick the unit you want in To — or type
100 Mbps to MB/sin Quick convert. - Read the result and the lines under it: the ÷ 8 shortcut, the same speed in binary units (MiB/s) and how long 1 GB takes at that rate.
- To check a cable or port, open the table of USB, Ethernet and Wi-Fi speeds and select a link to convert its nominal rate.
- Copy the result or a link, download the table of every unit as CSV, or open Convert a list to convert a column of speeds.
Examples
100 Mbps to MB/s
12.5 MB/s
8 bits make a byte, so divide by 8. In binary units it is 11.92 MiB/s.
1 Gbps to MB/s
125 MB/s
1 GB then takes 8 seconds at best.
25 MB/s to Mbps
200 Mbit/s
10 MiB/s to Mbps
83.88608 Mbit/s
5 Mbps to GB/h
2.25 GB per hour
5,000,000 bit/s × 3,600 s ÷ 8 = 2,250,000,000 bytes.
480 Mbps to MB/s
60 MB/s nominal
The USB 3.2 specification puts the usable bandwidth of USB 2.0 at about 32 MB/s.
Common uses
- Turning the Mbps of an internet plan into the MB/s a download shows.
- Checking what a USB port, Ethernet cable or Wi-Fi link can move in MB/s at most.
- Estimating streaming data use in GB per hour from a bit rate.
- Converting bandwidth figures between kbit/s, Mbit/s, Gbit/s and binary byte rates for networking and video work.
Bits, bytes and the ÷ 8 rule
Network speeds are counted in bits per second and written with a small b — Mbps, Mbit/s or Mb/s. File sizes and download progress are counted in bytes with a capital B — MB/s. A byte is 8 bits, so divide a bit rate by 8 to get the byte rate: 100 Mbit/s ÷ 8 = 12.5 MB/s, and 1 Gbit/s ÷ 8 = 125 MB/s.
Network rates always use decimal prefixes: 1 Mbit/s is 1,000,000 bit/s. Some programs show transfer speeds in binary units (KiB/s, MiB/s), where 1 MiB/s = 1,048,576 bytes per second; the converter lists both, and the line under each result gives the binary figure.
Nominal speeds are not download speeds
The rates in the table are what the link signals on the wire. Part of that goes to line encoding, packet headers, acknowledgements and retransmissions, and a transfer is also limited by the slowest disk, server or network hop on the way. The USB 3.2 specification itself describes USB 2.0 (480 Mbit/s nominal, 60 MB/s) as having “~32 MB/sec bandwidth”, and USB 3.0 (5 Gbit/s, 625 MB/s) as moving data “at rates up to 450 MB/sec”.
Wi-Fi figures are the highest link rates of the standard with the widest channel and the strongest modulation, which a device reaches only close to the router. The table uses 2 spatial streams, as many phones and laptops have; the standards allow up to 4 (Wi-Fi 4) or 8 (Wi-Fi 5, 6 and 7 — 16 streams were considered for Wi-Fi 7 but left out of the standard).
Where the link speeds come from
- USB: the USB 2.0 Specification (low-speed 1.5 Mb/s, full-speed 12 Mb/s, high-speed 480 Mb/s), USB 3.2 Revision 1.1 (Gen 1 = 5 Gbps, Gen 2 = 10 Gbps, two lanes for 20 Gbps) and the USB4 Specification 2.0 (up to 80 Gbps, or 120 Gbps in one direction), all from usb.org; the box names (USB 5Gbps … USB 80Gbps) are from the USB-IF Data Performance Language Usage Guidelines.
- Ethernet: IEEE 802.3, where the number in each name is the data rate; 2.5GBASE-T and 5GBASE-T come from IEEE 802.3bz.
- Wi-Fi: the generation names are the Wi-Fi Alliance’s (Wi-Fi 4 = 802.11n, Wi-Fi 5 = 802.11ac, Wi-Fi 6 = 802.11ax; Wi-Fi 7 is 802.11be). Link rates are worked out from the data subcarriers, modulation, coding rate 5/6 and symbol time of each standard’s fastest mode. The stream limits are 4 for 802.11n and 8 for 802.11ac, 802.11ax and 802.11be; Cisco Meraki’s Wi-Fi 7 (802.11be) Technical Guide notes that “the number of spatial streams in Wi-Fi 7 is limited to 8, like the previous generation”, so its highest link rate is 8 × 2,882.4 ≈ 23,059 Mbit/s (the often-quoted 46 Gbit/s assumes 16 streams).
Limitations
- Nominal rates are upper limits; real throughput depends on overhead, distance, interference and the equipment at both ends.
- Wi-Fi rates are for the widest channel and the fastest modulation; most devices connect at lower rates.
- Baud (symbols per second) is not a bit rate and is not converted.
- Transfer times assume a constant rate with no overhead; use them as a best case.
Privacy
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Frequently asked questions
Is 100 Mbps the same as 100 MB/s?
No. Mbps is megabits per second and MB/s megabytes per second; a byte is 8 bits, so 100 Mbps is 12.5 MB/s.
How do I convert Mbps to MB/s?
Divide by 8: 300 Mbps ÷ 8 = 37.5 MB/s. To go back, multiply by 8: 50 MB/s × 8 = 400 Mbps.
Why is my download slower than my internet plan?
Plans are sold in megabits per second, while downloads show megabytes per second — divide by 8 first. After that, protocol overhead, Wi-Fi signal, other devices on the network and the speed of the server all reduce the rate, so the plan’s figure is a maximum.
What is the difference between MB/s and MiB/s?
MB/s counts 1,000,000 bytes per second and MiB/s 1,048,576 bytes per second, so 1 MiB/s = 1.048576 MB/s and 100 Mbit/s is 12.5 MB/s or 11.92 MiB/s.
How fast is USB 3.0 in MB/s?
Its nominal rate is 5 Gbit/s, which is 625 MB/s; it is now called USB 3.2 Gen 1, or “USB 5Gbps” on packaging. The USB 3.2 specification says USB 3.0 moves data at up to 450 MB/s in practice.
How much data does a 5 Mbps stream use per hour?
5 Mbit/s × 3,600 s = 18,000 Mbit = 2,250 MB, so 2.25 GB per hour. Select GB/h in the To box to convert any bit rate this way.