Megabytes to Gigabytes Converter

Megabytes to Gigabytes

Convert megabytes (MB) to gigabytes (GB). Both measure digital storage, and the conversion comes up in computing, storage, internet work.

The Formula

`` gigabytes = megabytes × 0.001 megabytes = gigabytes × 1000 `

One megabyte is 0.001 gigabytes, and one gigabyte is 1,000 megabytes.

Conversion Table

Megabytes	Gigabytes
1 MB	0.001 GB
2 MB	0.002 GB
5 MB	0.005 GB
10 MB	0.01 GB
25 MB	0.025 GB
50 MB	0.05 GB
100 MB	0.1 GB
500 MB	0.5 GB
1,000 MB	1 GB

The Other Direction

Gigabytes	Megabytes
1 GB	1,000 MB
2 GB	2,000 MB
5 GB	5,000 MB
10 GB	10,000 MB
25 GB	25,000 MB
50 GB	50,000 MB
100 GB	100,000 MB
500 GB	500,000 MB
1,000 GB	1,000,000 MB

What Each Unit Is

Megabytes (MB) — 1,000,000 bytes in decimal usage. The file-size unit of the CD-ROM era.

Gigabytes (GB) — 1,000,000,000 bytes in decimal usage. The unit of modern storage and mobile data plans.

A Sense of Scale

• An MP3 is 3–5 MB
• A phone photo is 2–5 MB
• A JS bundle should stay under 1 MB
• An HD film is 4–8 GB
• A phone ships with 128–512 GB

Precision

The factor 0.001 is exact by international agreement, not a rounded approximation. Any imprecision in a result comes from your input, not the conversion.

In Code

`javascript const megabyteToGigabyte = (value) => value * 0.001; ``

Where This Conversion Comes Up

• Computing
• Storage
• Internet
• Media
• Backups

How Many Decimals Do You Need?

Rounding the factor costs accuracy, and how much depends on the factor. Converting 137 MB with the factor truncated at each decimal place:

Decimals kept	Factor	137 MB becomes	Error
0	0	0	100.0000%
1	0	0	100.0000%
2	0	0	100.0000%
3	0.001	0.137	—
4	0.001	0.137	—

A rule that holds for any conversion: round once, at the end. Rounding the factor and then multiplying compounds the error through every subsequent calculation, while carrying full precision and rounding the final answer does not.

The right number of significant figures is set by your input, not by the converter. If you measured megabytes to three significant figures, the answer in gigabytes is only good to three — writing more digits claims precision the measurement never had.

Other Conversions From Megabytes

The same value in every other unit this converter supports for data:

From	To	Unit
1 MB	8,000,000 b	Bits
1 MB	1,000,000 B	Bytes
1 MB	8,000 Kb	Kilobits
1 MB	1,000 KB	Kilobytes
1 MB	8 Mb	Megabits
1 MB	1.0000e-6 TB	Terabytes

Chaining conversions works — megabytes to metres to feet gives the same answer as megabytes to feet — but each step rounds, so a chain of three conversions carries three roundings. Convert directly where a direct factor exists.