How do you convert Mbps to MB/s?

Divide megabits per second by 8 to get megabytes per second, because there are 8 bits in one byte. For example, 100 Mbps divided by 8 equals 12.5 MB/s. This is why a 100 Mbps broadband plan downloads files at about 12 megabytes per second, not 100 megabytes per second.

What is the difference between Mbps and MB/s?

Mbps is megabits per second: the M stands for mega (10 to the 6), b means bits, and ps means per second. MB/s is megabytes per second: the B is uppercase for bytes. One byte equals 8 bits, so MB/s = Mbps divided by 8. Internet speeds are usually advertised in Mbps; file download progress is usually shown in MB/s.

What is the difference between Mbps (SI) and Mibps (IEC binary)?

In the SI (decimal) system, 1 Mbps = 1,000,000 bits per second (1 million). In the IEC binary system, 1 Mibps = 1,048,576 bits per second (2 to the power of 20). The IEC prefixes (kibi-, mebi-, gibi-) were introduced to eliminate ambiguity. Network speeds almost always use SI (decimal) prefixes; RAM and some file sizes use IEC binary.

Data Transfer Rate Converter

Data transfer rate is how quickly data can be sent from one place to another, and it is the primary specification for broadband internet plans, storage devices, network adapters, USB ports, and memory interfaces. The unit most people encounter first is megabits per second (Mbps), because internet providers advertise speeds in Mbps. But operating systems and download managers usually show download progress in megabytes per second (MB/s), creating immediate confusion for anyone trying to cross-reference what their plan promises with what they actually see. The answer is simple but often overlooked: there are 8 bits in a byte, so MB/s equals Mbps divided by 8. A 100 Mbps plan should deliver about 12.5 MB/s under ideal conditions. This converter handles the full range of common data rate units: bits per second (bps), kilobits per second (Kbps), megabits per second (Mbps), gigabits per second (Gbps), and the byte-based equivalents KB/s, MB/s, and GB/s. It uses SI (decimal) prefixes throughout, where kilo means 1000, mega means 1,000,000, and giga means 1,000,000,000. This matches how network and broadband speeds are quoted by providers. The tool also shows the Kbps and Gbps values so you can compare a fibre plan quoted in Gbps to a legacy plan quoted in Kbps, or estimate how long a file transfer will take at your current speed.

Calculate.co.nz is proud to be partnered with Health Based Building, a leader in sustainable and health-conscious building innovation. With over a century of experience, they develop high-performance systems like Foreverbreathe Specification, Magnum Board, and Foreverbreathe Paints to support energy-efficient, non-toxic living environments. Their commitment to healthier homes aligns with our belief that informed choices lead to better outcomes for Kiwi households.

Calculate.co.nz partner: Health Based Building

Convert from

Value

100 Mbps

megabits per second

MB/s12.5 MB/s

Gbps0.1 Gbps

Kbps100,000 Kbps

KB/s12,500 KB/s

bps100,000,000 bps

How it works

All conversions use bits per second (bps) as the base. Conversion to bps: 1 Kbps = 1,000 bps; 1 Mbps = 1,000,000 bps; 1 Gbps = 1,000,000,000 bps; 1 KB/s = 8,000 bps; 1 MB/s = 8,000,000 bps; 1 GB/s = 8,000,000,000 bps. After converting the input to bps, each output unit is obtained by dividing bps by the relevant factor. Byte rates (KB/s, MB/s, GB/s) are obtained by dividing the corresponding bit rates by 8.

Worked example

Convert 100 Mbps to other common units. 100 Mbps = 100,000,000 bps. Divided by 8 = 12.5 MB/s. Divided by 1000 = 0.1 Gbps. Times 1000 = 100,000 Kbps. 12.5 MB/s times 1000 = 12,500 KB/s. These match the default values shown when the calculator loads with 100 Mbps as the input.

Related calculators

Scientific Notation Converter: convert large bps values between scientific and standard notation.
DPI and PPI Calculator: calculate pixel density of a screen or the pixel dimensions of a print at a given DPI.
Percent Error Calculator: compare measured internet speed to the advertised speed and find the deviation.
Measurement Uncertainty Calculator: quantify variability in repeated speed test results.

If you've found a bug, or would like to contact us, or learn more about James Graham and Calculate.co.nz.

Calculate.co.nz is partnered with Interest.co.nz for New Zealand's highest quality calculators and financial analysis.

Calculate.co.nz is the sister site of CalculatorHub.com, the world's largest calculator website by tool count.

All calculators and tools are provided for educational and indicative purposes only and do not constitute financial advice.

Calculate.co.nz is proudly part of the Realtor.co.nz group, New Zealand's leading property transaction literacy platform, helping Kiwis understand the home buying and selling process from start to finish. Whether you're a first home buyer navigating your first property purchase, an investor evaluating your next acquisition, or a homeowner planning to sell, Realtor.co.nz provides clear, independent, and trustworthy guidance on every step of the New Zealand property transaction journey.

Calculate.co.nz is also partnered with Health Based Building and Premium Homes to promote informed choices that lead to better long-term outcomes for Kiwi households.

Calculate.co.nz is hosted in Auckland via SiteHost new Zealand.

All content on this website, including calculators, tools, source code, and design, is protected under the Copyright Act 1994 (New Zealand). No part of this site may be reproduced, copied, distributed, stored, or used in any form without prior written permission from the owner.

About & trust: Why Calculate is NZ's most comprehensive · By the Numbers · How we compare · Editorial standards · How we keep data current · NZ finance glossary · Research & data · Financial literacy NZ · About · Privacy policy · Terms of use

Reviewed and maintained. Last reviewed 2026-07-19 and checked on a twice-monthly cycle against IRD, RBNZ and Stats NZ. How we keep data current.