What's the difference between MB and Mb?

MB (capital B) means megabytes (storage). Mb (lowercase b) means megabits (data transfer). There are 8 bits in a byte, so 100 Mb/s internet is about 12.5 MB/s actual download speed.

What's the difference between KB and KiB?

KB (kilobyte) = 1000 bytes (decimal). KiB (kibibyte) = 1024 bytes (binary). The difference grows larger with bigger units.

Conversion

Data Storage Converter

Free data storage converter from bytes to petabytes. Convert between KB, MB, GB, TB, and all digital storage units instantly.

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Convert Data Storage Units Instantly

Working with file sizes, storage capacity, or bandwidth? Our data storage converter handles conversions between bytes, kilobytes, megabytes, gigabytes, terabytes, and petabytes using binary (1024) conversion factors.

Understanding Data Storage Units

Data storage is measured in bytes, with each larger unit being 1,024 times the previous (in binary). A kilobyte is 1,024 bytes, a megabyte is 1,024 KB, and so on. Understanding these conversions is essential for working with files, storage devices, and data transfer.

Binary Conversion

1 KB = 1,024 Bytes = 2^10 Bytes

Why Use This Converter?

All Units

Convert between any unit from bytes to petabytes.

Binary & Decimal

Understand the difference between KB and KiB.

Instant

Real-time results as you type.

How to Convert

Common Applications

Hardware Shopping

Understand actual drive and memory capacities.

File Transfers

Calculate download times and space needed.

Software Development

Plan storage requirements.

Cloud Services

Compare storage plans.

Frequently Asked Questions

Drive manufacturers use decimal (1 KB = 1,000 bytes) while computers use binary (1 KB = 1,024 bytes). This difference compounds with larger units, so a '1 TB' drive appears as about 931 GB in your computer.