Data Storage Converter - Free Online Digital Units Calculator

How to Use This Digital Units Calculator

Enter a value in any unit: bits, bytes, kilobytes, megabytes, gigabytes, or terabytes.
All conversions appear instantly across binary (IEC) and decimal (SI) prefixes.
Toggle between base-2 (1 KB = 1,024 bytes) and base-10 (1 KB = 1,000 bytes) conventions.
Copy any result from the output table for your documentation.

Data Storage Converter provides a precise way to navigate the ambiguity of digital storage measurements. Storage units are notoriously inconsistent - a "1 TB" hard drive uses the SI definition (10¹² bytes) while your operating system reports it as 931 GB using the binary definition (2⁴⁰ bytes). This byte converter handles both SI (kilo/mega/giga/tera = powers of 1,000) and IEC (kibi/mebi/gibi/tebi = powers of 1,024) prefixes, making the "missing storage" mystery immediately clear.

Binary Storage Conversion for Precise Planning

The IEC 80000-13 standard introduced separate prefixes for binary multiples to end the confusion: kibibyte (KiB) = 1,024 bytes; mebibyte (MiB) = 1,048,576 bytes; gibibyte (GiB) = 1,073,741,824 bytes. Drive manufacturers use SI prefixes (KB = 1,000, MB = 1,000,000) because they give larger-seeming numbers. This mb to gb converter and gigabyte to terabyte utility helps you understand exactly how much space you have available. Whether you're calculating file size calculator results for a web server or determining cloud storage needs, our tool provides the exact bit and byte breakdown you need.

Bits, bytes, KB/KiB, MB/MiB, GB/GiB, TB/TiB, PB/PiB
Both SI (decimal) and IEC (binary) conversion tables
Explains "missing space": why a 1 TB drive shows as 931 GB
Network bandwidth context for comprehensive data planning

Frequently Asked Questions

Why does my 1 TB hard drive only show 931 GB in Windows?

1 TB = 1,000,000,000,000 bytes (manufacturer). Windows reports in GiB (1,073,741,824 bytes each) but labels it "GB". So 1,000,000,000,000 ÷ 1,073,741,824 ≈ 931. No space is missing - it is a unit labelling difference.

What is a gibibyte?

A gibibyte (GiB) = 2³⁰ = 1,073,741,824 bytes. It is the IEC standard term for what was historically called a "gigabyte" in computing contexts. The SI gigabyte (GB) = 10⁹ = 1,000,000,000 bytes.

What units do RAM specifications use?

RAM is specified in binary units - a 16 GB RAM module is actually 16 GiB (2⁴ × 1,073,741,824 bytes). RAM manufacturers use binary prefixes consistently, unlike storage manufacturers.

How do internet speeds relate to file sizes?

Internet speeds are in megabits per second (Mbps). File sizes are in megabytes (MB). Divide Mbps by 8 to get MB/s download speed. A 100 Mbps connection downloads at ~12.5 MB/s; a 1 GB file takes ~80 seconds.

See also the Unit Converter and the Binary to Decimal converter to complete your technical toolkit with this Data Storage Converter.