How many bytes are in one gigabyte?

In decimal (SI) labeling, 1 GB = 1,000,000,000 bytes. In binary, 1 GiB = 1,073,741,824 bytes. Check which system your label uses.

Why does my 1 TB drive show less space in the OS?

Drives are often sold with decimal TB while operating systems report binary GiB/TiB. 1 TB decimal ≈ 0.91 TiB — the capacity did not vanish; the unit system changed.

How do I convert bits to bytes?

Divide bits by 8. Example: 64 Gbit ÷ 8 = 8 GB on the same SI prefix scale. Use the Data Storage Converter for mixed pairs.

What is the difference between MB and MiB?

MB usually means 1,000,000 bytes (decimal); MiB means 1,048,576 bytes (binary). Confusing them causes the familiar “missing” storage effect.

How do I convert megabytes to gigabytes?

For decimal units, divide MB by 1,000. Example: 4,800 MB = 4.8 GB. For binary, divide MiB by 1,024 to get GiB.

Are ShoutingNow storage converters free?

Yes. The Data Storage Converter and dedicated pair tools are free with no account required.

Data Storage Conversion Guide: Bytes, KB, MB, GB & TB

Data storage conversion is how you compare drive labels, cloud quotas, and file sizes when one screen says gigabytes and another says gibibytes — or when a download is listed in MB while your disk reports GiB. Marketing often uses decimal SI steps (1,000); operating systems often use binary steps (1,024). This guide explains both, with formulas, tables, and converter links.

Convert storage now: Open the free Data Storage Converter — bytes through terabytes and bits. No sign-up required.

What data storage conversion is (and why sizes “shrink”)

Storage conversion rewrites a quantity of digital information in another unit: bits, bytes, KB/MB/GB/TB (decimal) or KiB/MiB/GiB/TiB (binary). A “1 TB” drive advertised with decimal terabytes holds 1,000,000,000,000 bytes — about 0.91 TiB in binary, which is why the OS can show a smaller number than the box.

Bits vs bytes matter too: 1 byte = 8 bits. Confusing them understates or overstates capacity by a factor of eight.

Plain-language storage formulas

Bits ↔ bytes: divide bits by 8 for bytes. Multiply bytes by 8 for bits.
Decimal (SI) steps: each step × 1,000 (KB → MB → GB → TB).
Binary (IEC) steps: each step × 1,024 (KiB → MiB → GiB → TiB).
GB (decimal) → bytes: multiply by 1,000,000,000.
GiB → bytes: multiply by 1,073,741,824 (1024³).

When a vendor does not say which system they use, assume marketing labels are decimal and OS file browsers are often binary — then convert explicitly.

Data storage conversion tables

Decimal storage steps

Unit	Bytes (exact decimal)
1 KB	1,000
1 MB	1,000,000
1 GB	1,000,000,000
1 TB	1,000,000,000,000

Binary storage steps

Unit	Bytes
1 KiB	1,024
1 MiB	1,048,576
1 GiB	1,073,741,824
1 TiB	1,099,511,627,776

Worked examples

Example 1 — photo library in GB

A folder is 4,800 MB (decimal). In GB: 4,800 ÷ 1,000 = 4.8 GB.

Example 2 — drive label vs OS

A drive is sold as 2 TB decimal = 2,000,000,000,000 bytes. In GiB: 2,000,000,000,000 ÷ 1,073,741,824 ≈ 1,862.6 GiB (~1.86 TiB).

Example 3 — bits on a datasheet

A chip lists 64 Gbit. In bytes: 64 ÷ 8 = 8 GB (decimal gigabits → gigabytes when using the same SI prefix scale).

Common data storage mistakes

Assuming KB always means 1,024 — many specs now use KiB for binary and KB for decimal.
Comparing cloud quotas in GB to OS sizes in GiB without converting.
Mixing bits and bytes on network or media labels.
Rounding mid-pipeline when estimating how many files fit on a card.

Data storage converter tools

Start with the Data Storage Converter, or jump to a dedicated pair:

Data transfer rate guide — Mbps vs MB/s for downloads
Unit conversion chart & calculator guide — full category map