Megabytes to Bits Converter

Megabytes to Bits

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

The Formula

`` bits = megabytes × 8000000 megabytes = bits × 1.25e-7 `

One megabyte is 8,000,000 bits, and one bit is 1.2500e-7 megabytes.

Conversion Table

Megabytes	Bits
1 MB	8,000,000 b
2 MB	16,000,000 b
5 MB	40,000,000 b
10 MB	80,000,000 b
25 MB	200,000,000 b
50 MB	400,000,000 b
100 MB	800,000,000 b
500 MB	4,000,000,000 b
1,000 MB	8,000,000,000 b

The Other Direction

Bits	Megabytes
1 b	1.2500e-7 MB
2 b	2.5000e-7 MB
5 b	6.2500e-7 MB
10 b	1.2500e-6 MB
25 b	3.1250e-6 MB
50 b	6.2500e-6 MB
100 b	1.2500e-5 MB
500 b	6.2500e-5 MB
1,000 b	1.2500e-4 MB

What Each Unit Is

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

Bits (b) — a single binary digit — the smallest unit of information. Named by John Tukey in 1946, from "binary digit".

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
• Network speeds are quoted in bits per second
• A byte is 8 bits

Precision

The factor 8000000 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 megabyteToBit = (value) => value * 8000000; ``

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	8000000	1,096,000,000	—
1	8000000	1,096,000,000	—
2	8000000	1,096,000,000	—
3	8000000	1,096,000,000	—
4	8000000	1,096,000,000	—

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 bits 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	1,000,000 B	Bytes
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.