Tool
Data Storage Converter
Convert between bytes, KB, MB, GB, TB and PB instantly. Live reference table for all storage units.
Convert data sizes in three steps
Works in any browser, on any device. No install required.
Enter a data size
Type any number into the input field.
Select the unit
Choose the source unit — bytes, KB, MB, GB, TB, or PB.
See all data units at once
Every storage unit updates simultaneously as you type.
Storage units
Bits and bytes
From bits to terabytes including binary (GiB) and decimal (GB).
Binary vs decimal
Shows IEC binary (GiB, MiB) and SI decimal (GB, MB) representations.
Live conversion
Type a value and all units refresh instantly. No button needed.
About the Data Storage Converter
Data storage units are based on powers of 1024 (binary) in operating systems, while storage manufacturers use powers of 1000 (decimal). This means a 1 TB drive shows as ~931 GB in Windows or macOS. Understanding the difference matters when buying storage, planning backups, or working with file sizes in development.
Common uses: understanding file sizes, planning storage purchases, calculating bandwidth requirements, comparing cloud storage plans, and working with database sizes in software development.
The most practical conversion for most people is megabytes to gigabytes — a 1,500 MB video file is 1.46 GB, which is why it may not fit on a drive showing 1.2 GB free. The tool uses binary (1 GB = 1,024 MB) since that matches what your operating system reports, not the decimal 1,000 MB that storage manufacturers print on packaging.
For developers, common uses include calculating database sizes, checking whether a file exceeds an API upload limit, estimating S3 or cloud storage costs, and understanding memory requirements for applications. A quick reference: 1 KB = 1,024 bytes, 1 MB = 1,024 KB, 1 GB = 1,024 MB, 1 TB = 1,024 GB.
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Frequently Asked Questions
What is the difference between GB and GiB?
1 GB = 1,000,000,000 bytes (decimal). 1 GiB = 1,073,741,824 bytes (binary). Hard drives use decimal GB; OS historically reported binary GiB. A '1 TB' drive shows as ~931 GiB in Windows.
How many bytes are in a kilobyte?
Decimal: 1 KB = 1,000 bytes. Binary: 1 KiB = 1,024 bytes.
What are typical file sizes?
1-min HD video ~100-150 MB. 10MP JPEG ~3-5 MB. PDF page ~0.5-1 MB. 10,000-word text doc ~60 KB.
What is the difference between a bit and a byte?
A bit is one 0 or 1. A byte is 8 bits. Network speeds use bits (Mbps); file sizes use bytes (MB). 100 Mbps = ~12.5 MB/s.