Megabytes to Bytes Converter

Megabytes to Bytes

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

The Formula

`` bytes = megabytes × 1000000 megabytes = bytes × 0.000001 `

One megabyte is 1,000,000 bytes, and one byte is 1.0000e-6 megabytes.

Conversion Table

Megabytes	Bytes
1 MB	1,000,000 B
2 MB	2,000,000 B
5 MB	5,000,000 B
10 MB	10,000,000 B
25 MB	25,000,000 B
50 MB	50,000,000 B
100 MB	100,000,000 B
500 MB	500,000,000 B
1,000 MB	1,000,000,000 B

The Other Direction

Bytes	Megabytes
1 B	1.0000e-6 MB
2 B	2.0000e-6 MB
5 B	5.0000e-6 MB
10 B	1.0000e-5 MB
25 B	2.5000e-5 MB
50 B	5.0000e-5 MB
100 B	1.0000e-4 MB
500 B	5.0000e-4 MB
1,000 B	0.001 MB

What Each Unit Is

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

Bytes (B) — 8 bits. Coined at IBM in 1956 for the group of bits encoding one character.

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
• One ASCII character is 1 byte
• A UTF-8 emoji is often 4 bytes

Precision

The factor 1000000 is rounded. For engineering work carry more digits than the table above, and round only at the end — rounding at each step compounds.

In Code

`javascript const megabyteToByte = (value) => value * 1000000; ``

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	1000000	137,000,000	—
1	1000000	137,000,000	—
2	1000000	137,000,000	—
3	1000000	137,000,000	—
4	1000000	137,000,000	—

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 bytes 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	8,000 Kb	Kilobits
1 MB	1,000 KB	Kilobytes
1 MB	8 Mb	Megabits
1 MB	0.001 GB	Gigabytes
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.