Convert

Megabyte to Gigabyte

Exact answer: 1 MB = 0.001 GB (exact – SI decimal prefix)

Megabyte and Gigabyte both belong to the Data family. The difference is a decimal prefix, so the factor is a clean power of ten. Data volumes determine storage plans, upload limits, drive sizes and backup budgets.

Unit console

Convert units with formula, context and precision

UnitCloud is a local measurement lab for everyday work, engineering, IT, energy, mobility and design. Every conversion shows result, formula, base unit, rounding and the common mistake.

What do you want to convert?

From100 MB

Result0.1 GB

Factor1 MB = 0.001 GB

Source basisNIST Metric SI Prefixes · NIST Binary Prefixes

Examples

01100 MB = 0.1 GB

Example value from the reference table. Internal calculation uses stored factors; display output is rounded.

02Common mistake

KB, MB and GB are decimal. KiB, MiB and GiB are binary. This distinction explains many apparent storage gaps.

03Base unit: Byte

1 MB = 1000000 Byte. Then the value is converted through the base unit Byte into Gigabyte.

Table

Megabyte to Gigabyte
Megabyte	Gigabyte
100	0.1
500	0.5
1,000	1
2,048	2.048
5,000	5
10,000	10

Formula

1 MB = 1000000 Byte. Then the value is converted through the base unit Byte into Gigabyte.

Sources

NIST Metric SI PrefixesDecimal SI prefix names and factors.NIST Binary PrefixesIEC binary prefixes such as KiB, MiB and GiB.

Related conversions

Gigabyte to GibibyteGB → GiBData Gibibyte to GigabyteGiB → GBData Mebibyte to MegabyteMiB → MBData Megabyte to MebibyteMB → MiBData

Search and practice paths

FormulaTableExamplesCommon mistakeEveryday/engineeringExcel/CSVBatch converterPrint view

DataComparing data volumes Data rateReading internet speed correctly

Factor origin

Factors come from the stored source family and are not derived from rounded display values.

Rounding rule

UnitCloud keeps calculating with stored factors and rounds only the displayed output by selected precision.

When not to use

Do not use as the sole basis for official, medical, safety-critical or contractual decisions.

Citation

Citation note: UnitCloud, conversion with formula, sources reviewed: September 2026. Data. Source basis: NIST Metric SI Prefixes · NIST Binary Prefixes.

Common questions

What is the factor for Megabyte to Gigabyte?

1 MB = 0.001 GB

Which formula does Megabyte to Gigabyte use?

1 MB = 1000000 Byte. Then the value is converted through the base unit Byte into Gigabyte.

What is the most common mistake?

KB, MB and GB are decimal. KiB, MiB and GiB are binary. This distinction explains many apparent storage gaps.

When should I verify the result?

Do not use as the sole basis for official, medical, safety-critical or contractual decisions.