--- title: "Bytes to Bits Converter: KB, MB, GB, Mbps & Download Time" description: "Convert between bits, bytes, KB, MB, GB, TB, KiB, MiB, GiB and Mbps, and work out how long a download takes at your internet speed. Free and instant." url: https://getmylocations.com/bytes-bits-converter --- Free Tool · Decimal and binary units # Bytes and bits converter Enter an amount in any unit to see it in **bits, bytes, kilobytes, megabytes, gigabytes and terabytes**, in both decimal (KB, MB, GB) and binary (KiB, MiB, GiB) units, and calculate **how long a download takes**. Last updated November 4, 2026 by [Ahmed Anwar](https://getmylocations.com/about). ## Convert bytes, bits and data sizes | Unit | Value | | --- | --- | | Bit (b) | 8,000,000,000 | | Byte (B) | 1,000,000,000 | | Kilobit (kb) | 8,000,000 | | Megabit (Mb) | 8,000 | | Gigabit (Gb) | 8 | | Terabit (Tb) | 0.008 | | Kilobyte (KB) | 1,000,000 | | Megabyte (MB) | 1,000 | | Terabyte (TB) | 0.001 | | Petabyte (PB) | 0.000001 | | Kibibyte (KiB) | 976,562.5 | | Mebibyte (MiB) | 953.67 | | Gibibyte (GiB) | 0.93132257 | | Tebibyte (TiB) | 0.00090949 | ### How long will a download take? atMbps 5 min 20 s At full speed. Real downloads are usually 10 to 20 percent slower because of network overhead and Wi-Fi. ## What are bits and bytes? A **bit** is the smallest piece of digital data: a single 0 or 1. A **byte** is a group of 8 bits, enough to store one letter of plain English text. Larger units are built from these: a kilobyte, megabyte and gigabyte are a thousand, a million and a billion bytes. Network speeds are counted in bits per second, and file sizes in bytes. Mixing the two up is the most common reason a download seems eight times slower than the speed you pay for. ## Common conversions | Amount | Equals | | --- | --- | | 1 GB | 1,000 MB | | 1 GiB | 1,024 MiB | | 1 TB | 1,000 GB | | 1 MB | 8,000,000 bits | | 1 MB | 1,000 KB | | 1 GB | about 0.931 GiB | | 1 Gb (gigabit) | 125 MB | ## Decimal and binary units | Decimal (SI) | Bytes | Binary (IEC) | Bytes | | --- | --- | --- | --- | | 1 KB (kilobyte) | 1,000 | 1 KiB (kibibyte) | 1,024 | | 1 MB (megabyte) | 1,000,000 | 1 MiB (mebibyte) | 1,048,576 | | 1 GB (gigabyte) | 1,000,000,000 | 1 GiB (gibibyte) | 1,073,741,824 | | 1 TB (terabyte) | 10¹² | 1 TiB (tebibyte) | 1,099,511,627,776 | The gap grows with size: a gibibyte is about 7% larger than a gigabyte, a tebibyte about 10% larger than a terabyte. ## How long does a download take? Time to download each file at full speed, worked out with the same calculator as the tool above: | File | 10 Mbps | 25 Mbps | 100 Mbps | 300 Mbps | 1 Gbps | | --- | --- | --- | --- | --- | --- | | 1 GB file | 13 min 20 s | 5 min 20 s | 1 min 20 s | 27 s | 8 s | | 4 GB HD film | 53 min 20 s | 21 min 20 s | 5 min 20 s | 1 min 47 s | 32 s | | 50 GB game | 11 h 6 min 40 s | 4 h 26 min 40 s | 1 h 6 min 40 s | 22 min 13 s | 6 min 40 s | | 150 GB game | 1 d 9 h 20 min | 13 h 20 min | 3 h 20 min | 1 h 6 min 40 s | 20 min | Real downloads usually take a little longer. Part of every connection carries network overhead rather than your file, Wi-Fi is often slower than the line itself, and a busy server may not send at your full speed. Many browsers, game launchers and download managers show progress in megabytes per second (MB/s), so a steady 12 MB/s on a 100 Mbps line is close to the maximum of 12.5. ## Why a new drive shows less space than advertised Drive makers count in decimal units, where 1 TB is 1012 bytes. Windows counts in binary units (1 GiB = 1,0243 bytes) but labels them “GB”, so the same drive shows a smaller number. Nothing is missing. This is how each size appears in Windows before formatting and system files take their share: | Sold as | Shown in Windows | | --- | --- | | 128 GB | 119.2 GB | | 256 GB | 238.4 GB | | 512 GB | 476.8 GB | | 1 TB | 931.3 GB | | 2 TB | 1.82 TB | | 4 TB | 3.64 TB | macOS, iOS and Android use decimal units, so there a 1 TB drive shows close to 1 TB. ## Speeds and sizes - **Internet speed** is in megabits per second: 100 Mbps = 12.5 megabytes per second. - **A 4 GB film** takes about 5 minutes 20 seconds at 100 Mbps. - **Phone storage and data plans** are in decimal gigabytes. Measure your own connection with the [internet speed test](https://getmylocations.com/internet-speed-test), then plug the result into the download time calculator. ## Frequently asked questions How many MB are in a GB? 1,000 MB in decimal units, the ones used for drives, phones and data plans. In binary units, 1 GiB is 1,024 MiB, which Windows shows as “1 GB = 1,024 MB”. What is 1 Gbps in MB per second? 125 MB/s. Divide any speed in Mbps by 8 to get MB/s, so a gigabit connection can download up to about 125 megabytes each second at full speed. How many bits are in a byte? Eight. Internet speeds are given in bits per second (Mbps) and file sizes in bytes (MB), so divide a speed by 8 to get megabytes per second: 100 Mbps is 12.5 MB/s. Is 1 GB 1000 MB or 1024 MB? Both are in use. Drive makers and networking use decimal units (1 GB = 1,000 MB). Windows and memory use binary units (1 GiB = 1,024 MiB) but often label them “GB”. That is why a 1 TB drive shows about 931 GB in Windows. What is the difference between Mb and MB? A small b means bits, a capital B means bytes. 1 MB (megabyte) = 8 Mb (megabits). How long does it take to download 1 GB? At 100 Mbps, about 1 minute 20 seconds at full speed; at 25 Mbps about 5 minutes 20 seconds; at 1 Gbps about 8 seconds. Use the download time calculator above for any size and speed. ## Related tools [ ### Internet Speed Test Download, upload and ping ](https://getmylocations.com/internet-speed-test)[ ### Binary to Text Binary, text, hex and decimal ](https://getmylocations.com/binary-to-text)[ ### Password Generator Strong passwords and passphrases ](https://getmylocations.com/password-generator)[ ### MD5 & SHA Hash Generator MD5, SHA-1 and SHA-256 hashes ](https://getmylocations.com/md5-generator) AA Written by ### Ahmed Anwar Senior software engineer in Karachi. Builds the geolocation tools, mapping pages, and coordinate utilities on GetMyLocations. Writes about GPS, browser geolocation, and IP geolocation from the perspective of someone who ships the code, not the marketing. This article was researched and drafted with AI assistance, then edited and fact-checked by Ahmed before publication. [More about the author](https://getmylocations.com/about).