Data Converter (MB to GB, GB to TB, Mb to MB)

Convert between KB, MB, GB, TB, PB, and bit-to-byte units like Mb and Gb. Enter a value in the calculator below, or browse the popular converters and reference table further down.

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= 0.001
B ÷ 1,000 = KB
Byte to Kilobyte converter

Data Units Explained: Bytes vs Bits

Data is measured in two systems: bytes (used for storage and file sizes) and bits (used for network speeds). 1 byte = 8 bits, which is why download speeds in Mbps appear slower when converted to MB/s. For example, a 100 Mbps connection delivers about 12.5 MB per second.

Storage units scale in thousands (decimal system): 1 KB = 1,000 bytes, 1 MB = 1,000 KB, 1 GB = 1,000 MB, 1 TB = 1,000 GB, 1 PB = 1,000 TB. Common conversions include MB to GB for file sizes, GB to TB for storage capacity, and Mb to MB for understanding the relationship between speed and file size units.

Decimal vs Binary Units

This converter uses the decimal (SI) system where 1 GB = 1,000 MB. This matches how manufacturers label drives and how data plans are sold. Operating systems often use binary units (1 GiB = 1,024 MiB), which is why a 1 TB drive shows approximately 931 GB in your file manager. The difference is about 7% at the gigabyte level and grows at larger scales.

Units Covered

storage Byte (B) storage Kilobyte (KB) storage Megabyte (MB) storage Gigabyte (GB) storage Terabyte (TB) storage Petabyte (PB) storage Megabit (Mb) storage Gigabit (Gb)

Popular Converters

arrow_forwardMB to GB1 MB = 0.001 GB arrow_forwardGB to MB1 GB = 1,000 MB arrow_forwardGB to TB1 GB = 0.001 TB arrow_forwardTB to GB1 TB = 1,000 GB arrow_forwardKB to MB1 KB = 0.001 MB arrow_forwardMB to KB1 MB = 1,000 KB arrow_forwardMb to MB1 Mb = 0.125 MB arrow_forwardGb to GB1 Gb = 0.125 GB arrow_forwardTB to PB1 TB = 0.001 PB arrow_forwardPB to TB1 PB = 1,000 TB arrow_forwardB to KB1 B = 0.001 KB arrow_forwardKB to B1 KB = 1,000 B

Common Conversion Values

Value MB → GB GB → TB KB → MB Mb → MB
1 0.001 0.001 0.001 0.125
10 0.01 0.01 0.01 1.25
50 0.05 0.05 0.05 6.25
100 0.1 0.1 0.1 12.5
500 0.5 0.5 0.5 62.5
1,000 1 1 1 125

How These Conversions Work

Each unit pair has a fixed conversion factor defined by international standards. Multiply or divide by the factor to convert. Here are three examples:

10 MB = 0.01 GB. Multiply by 0.001. MB to GB converter.

1 GB = 1,000 MB. Multiply by 1,000. GB to MB converter.

10 GB = 0.01 TB. Multiply by 0.001. GB to TB converter.

Results above are rounded for readability. Each converter page shows the full-precision factor. For complete formulas with worked examples, visit the formulas hub.

Other Converters

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Frequently Asked Questions

MB (megabyte) is measured in bytes and used for file sizes. Mb (megabit) is measured in bits and often used for network speeds. 1 MB = 8 Mb. To convert megabits to megabytes, divide by 8. See the Mb to MB converter.
The most searched data conversions are MB to GB, GB to TB, KB to MB, and Mb to MB. These help with understanding file sizes, storage capacity, and download speeds.
There are 1,000 megabytes in a gigabyte (using the SI/decimal standard). Operating systems sometimes use the binary standard (1 GiB = 1,024 MiB), which is why a 1 TB drive shows about 931 GB. UnitCompare uses the SI decimal standard.
Manufacturers label drives using SI units (1 TB = 1,000 GB), but operating systems often display capacity using binary units (1 TiB = 1,024 GiB). The difference is about 7% at the gigabyte level and grows at larger scales.
Internet speeds are advertised in megabits per second (Mbps). File sizes are in megabytes (MB). Divide your speed in Mbps by 8 to get MB/s. For example, 100 Mbps = 12.5 MB/s.
person Written by Sean Day verified Reviewed by UnitCompare update Last updated Mar 28, 2026