Enter a value and choose units to convert between Bit, Byte, KB, MB, GB, TB, and PB.
Data storage is measured in multiples of bits and bytes. This tool uses the decimal (SI) system where 1 KB = 1,000 bytes, 1 MB = 1,000 KB, and so on. The binary system (KiB, MiB, GiB) uses 1024 as the multiplier instead — useful to know when comparing hard drive capacities.
To convert data storage units, multiply the value by the source unit's size in bytes, then divide by the target unit's size in bytes, using the decimal (SI) system where 1 KB equals 1,000 bytes. Example: 1,500 MB equals 1,500 x 1,000,000 / 1,000,000,000 = 1.5 GB.
1 GB is 1,000 MB in this tool, using the decimal (SI) definition where each unit is 1,000 times the one below it.
1 TB is 1,000 GB, using the same decimal (SI) scale as the rest of this converter.
500 GB is 500,000 MB (500 × 1,000 MB per GB).
1 KB is 1,000 bytes in this tool's decimal (SI) scale.
1 byte is 8 bits; this tool converts Bit to Byte using a factor of 1/8.
1 MB is 1,000 KB, following the same decimal chain as GB and TB.
1 TB is 1,000,000 MB (1,000 GB × 1,000 MB per GB).
This tool uses the decimal (SI) definition, where 1 GB = 1,000 MB = 1,000,000,000 bytes. Some operating systems instead show binary GiB, where 1 GiB = 1,024 MiB = 1,073,741,824 bytes, which is roughly 7% larger per unit than the decimal value this tool returns.
| From | To | Result |
|---|---|---|
| 1 GB | MB | 1,000 MB |
| 1 MB | KB | 1,000 KB |
| 8 bit | byte | 1 byte |
| 1,500 MB | GB | 1.5 GB |
| 1 TB | GB | 1,000 GB |
Manufacturers label drives using the decimal system (1 TB = 1,000,000,000,000 bytes), but operating systems often display capacity using the binary system (1 TiB = 1,099,511,627,776 bytes). A drive labeled 1 TB shows roughly 931 GiB in Windows File Explorer because of this difference, not because storage is missing.
A bit is a single binary digit, 0 or 1. A byte is a group of 8 bits and is the standard unit for measuring file sizes, memory, and storage capacity.
KB (kilobyte) uses the decimal system: 1,000 bytes. KiB (kibibyte) uses the binary system: 1,024 bytes. This tool uses the decimal (KB, MB, GB) convention, which is the standard for storage marketing and most SI-based measurements.
One petabyte (PB) equals 1,000 terabytes, or 1,000,000,000,000,000 (10 to the 15th power) bytes, in the decimal system used by this tool.
This tool uses the decimal (SI) system where 1 KB = 1,000 bytes; some operating systems and applications use the binary system (1,024) instead, which can produce different displayed values for the same file.
Sources: NIST - Prefixes for Binary Multiples (decimal vs. binary units)
Last updated: 2026-08-17