Data Size Converter
Convert between bits, bytes, KB, MB, GB, TB, and PB with binary and decimal units.
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Decimal (SI) vs Binary (IEC)
What is Data Size Conversion?
Data size conversion allows you to convert between different units of digital information. There are two systems: decimal (SI) units use powers of 1,000, while binary (IEC) units use powers of 1,024.
This tool features:
- Ten data units — Bits, bytes, KB, KiB, MB, MiB, GB, GiB, TB, and TiB.
- Instant conversion — Results update in real-time as you type.
- Binary vs Decimal — Clear distinction between SI and IEC standards.
- Bidirectional — Enter any value and all others update automatically.
How to Use
- Enter a data size — Type a value in any of the ten data size fields.
- View converted values — All other fields update automatically with the converted values.
- Check the reference — The reference section shows the difference between decimal and binary units.
Frequently Asked Questions
What is the difference between KB and KiB?
KB (kilobyte) uses the decimal system where 1 KB = 1,000 bytes. KiB (kibibyte) uses the binary system where 1 KiB = 1,024 bytes. Binary units are more common in computing.
How many bytes are in a gigabyte?
In the decimal system, 1 GB = 1,000,000,000 bytes. In the binary system, 1 GiB = 1,073,741,824 bytes.
Why do hard drives use decimal units?
Manufacturers use decimal units because the numbers appear larger. A "1 TB" drive contains 1,000,000,000,000 bytes, which is about 931 GiB.
Is this tool free to use?
Yes. All processing happens entirely in your browser. No data is sent to any server.