How To Internet & Network Kilobytes, Megabytes and Gigabytes — Network Data Rates Size and speed use similar language but different systems of measurement Share Pin Email Print Bill Hinton/Getty Images Internet & Network Key Concepts The Wireless Connection Basics Guides & Tutorials Installing & Upgrading Tips & Tricks What Are Bitcoins? by Bradley Mitchell An MIT graduate who brings years of technical experience to articles on SEO, computers, and wireless networking. Updated May 11, 2019 Bits and bytes aren't the same things — they're based on different computational systems. A bit is generally a single unit of information, represented as a binary value of zero or one. Eight of these bits create one byte. How Many Bits Are In a Byte? Most computer networking protocols and speeds are represented in a standard unit of measurement called bits per second. Measurements use standard International System of Units (SI) prefixes like kilo, mega, and giga such that 1,000 bits per second is equal to 1 kilobit per second. It's all base-10 math when counting bandwidth. However, computer storage aggregates bits into bytes and it is these bytes that form the basic unit of measurement for things like hard drive capacity. In a practical sense, the basic unit of measurement for storage is a kilobyte such that 1 KB is equal to 1,024 bytes, and 1 MB equals 1,024 KB. Because a byte consists of 8 bits in the binary system (e.g., 2^10), you'll always increment by 1,024 units as you increase the kilo/mega/giga scale instead of the 1,000 units you'd increase if you were working in bits. Why It Matters In theory, information transfers from one location to another one bit at a time. A computer with a 64-bit processor simultaneously transfers 64 bits — but it's still one bit at a time, it's just that the "pipe" contains 64 channels. For that reason, all data-throughput measures accrue in bits. Computers don't work with information one bit at a time, though. Usually, it takes eight bits considered as a group (as one byte) to render the smallest intelligible fact to a computer. This byte represents 1,024 different possible values, depending on whether the bits within the sequence represent a zero or a one. Although bits can be translated to bytes and vice versa, use bits to measure throughput and bytes to measure file size to avoid cross-comparing the two. Therefore, because computers tend to think in bytes rather than in their constituent bits, a file on your hard drive is constituted in bytes and thus increasing an order of magnitude requires you to multiply by 1,024 instead of just 1,000. Sample Conversions Bits and bytes generally aren't cross-comparable. The table below shows how many bits it takes to make a kilobit, a megabit, a byte, a kilobyte, and a megabyte. Conversion of Bits and Bytes Bit Kilobit Megabit Byte Kilobyte Megabyte 1 0.001 0.000001 0.125 0.000125 0.000000125 10 0.01 0.00001 1.25 0.00125 0.00000125 100 0.1 0.0001 12.5 0.0125 0.0000125 1000 1 0.001 125 0.125 0.000125 10000 10 0.01 1250 1.25 0.00125 100000 100 0.1 12500 12.5 0.0125 1000000 1000 1 12500 125 0.125 Put in practical terms, a 1-gigabit Ethernet connection transfers a 125 MB file in one second. It takes a 10-megabit Wi-Fi connection one minute and 40 seconds to effect the same transfer. The interplay of bits and bytes in computer networking presents interesting math challenges given that they're working in both decimal and binary number systems. Continue Reading What's the Difference Between Bits and Bytes? Explore the differences between kilobits, megabits, and gigabits The Meaning of Kbps, Mbps and Gbps Ratings for Network Equipment How Is Megabit (Mb) Different From Megabyte (MB)? Computer Technology Is Based on the Concept of the Bit A Guide to Binary Numbers in Computer Networking How Is Network Performance Measured? Every Wonder How Base64 Encoding Works to Send Data Over Email? How Big is a Byte and What Does it Mean in Computer Networking Are Bit Depth and Bit Rate the Same? The Use of Octets in Computers and Networking Everything You Need to Know About Network Speeds Determining the Speed of Your Broadband Internet Connection Learn More About Audio Bit Depth and How It Affects Sound 5G Speed: How to Understand the Numbers Networking 101: What's an Internet Protocol (IP) Address?