Terabytes to Megabytes Converter

Terabytes to Megabytes

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

The Formula

`` megabytes = terabytes × 1000000 terabytes = megabytes × 0.000001 `

One terabyte is 1,000,000 megabytes, and one megabyte is 1.0000e-6 terabytes.

Conversion Table

Terabytes	Megabytes
1 TB	1,000,000 MB
2 TB	2,000,000 MB
5 TB	5,000,000 MB
10 TB	10,000,000 MB
25 TB	25,000,000 MB
50 TB	50,000,000 MB
100 TB	100,000,000 MB
500 TB	500,000,000 MB
1,000 TB	1,000,000,000 MB

The Other Direction

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

What Each Unit Is

Terabytes (TB) — 1,000,000,000,000 bytes in decimal usage. The unit of consumer drives since the late 2000s.

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

A Sense of Scale

• A 1 TB drive shows as 931 GiB in Windows
• A 4K film master is several TB
• An MP3 is 3–5 MB
• A phone photo is 2–5 MB
• A JS bundle should stay under 1 MB

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 terabyteToMegabyte = (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 TB with the factor truncated at each decimal place:

Decimals kept	Factor	137 TB 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 terabytes to three significant figures, the answer in megabytes is only good to three — writing more digits claims precision the measurement never had.

Other Conversions From Terabytes

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

From	To	Unit
1 TB	8,000,000,000,000 b	Bits
1 TB	1,000,000,000,000 B	Bytes
1 TB	8,000,000,000 Kb	Kilobits
1 TB	1,000,000,000 KB	Kilobytes
1 TB	8,000,000 Mb	Megabits
1 TB	1,000 GB	Gigabytes

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