Byte
B
Kilobyte
KB
Megabyte
MB
Gigabyte
GB
Terabyte
TB
Petabyte
PB
Kibibyte
KiB
Mebibyte
MiB
Gibibyte
GiB
Tebibyte
TiB
Click any field to use it as your input — all other units update instantly.
Data Storage Converter
Convert between bytes, kilobytes, megabytes, gigabytes, terabytes and more. Instant data storage conversion.
How to convert data storage units online for free
- Type any data storage value into one of the fields above (no signup needed)
- All units update instantly — bytes, KB, MB, GB, TB, and binary equivalents (KiB, MiB, GiB)
- Click any result to copy — useful for comparing storage capacities and understanding file sizes
Why use our Data Storage Converter?
Data storage units confuse almost everyone because there are two competing systems: SI (1 GB = 1,000 MB) used by hard drive manufacturers, and binary (1 GiB = 1,024 MiB) used by operating systems. This discrepancy is why a "1 TB" drive shows as ~931 GB in Windows or macOS.
Our converter includes both SI and binary units side by side, so you can understand exactly why your drive appears smaller than advertised, or calculate how many files will fit on a device.
Everything runs in your browser. No account, no ads on the tool, completely free.
Frequently asked questions
- How many megabytes are in a gigabyte?
- In SI units (used by storage manufacturers): 1 GB = 1,000 MB. In binary (IEC) units: 1 GiB = 1,024 MiB. This converter includes both SI (GB) and binary (GiB) units.
- What is the difference between MB and MiB?
- MB (megabyte) is the SI unit: 1 MB = 1,000,000 bytes. MiB (mebibyte) is the binary unit: 1 MiB = 1,048,576 bytes. Operating systems often report sizes in MiB while drive makers use MB, causing apparent discrepancies.
- How many gigabytes are in a terabyte?
- In SI units: 1 TB = 1,000 GB. In binary units: 1 TiB = 1,024 GiB. A "1 TB" hard drive typically has about 931 GiB of actual usable space.
- How do I convert GB to MB?
- Multiply GB by 1,000 (for SI units). For example, 2 GB = 2,000 MB. If you're using binary, multiply GiB by 1,024 to get MiB.
- What is a petabyte?
- A petabyte (PB) is 1,000 terabytes or 1,000,000 gigabytes in SI units. A pebibyte (PiB) is 1,024 TiB. Major cloud providers and data centers store data at the petabyte scale.