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Data Converter.

Convert bits, bytes and decimal storage units.

This data converter changes bits, bytes, kilobytes, megabytes, gigabytes and terabytes into each other using decimal units, where 1 TB is 1,000 GB and 1 GB is 1,000 MB. It explains why a 1 TB drive shows about 931 GB in some operating systems. Type a size below to convert it.

Updated

INTERACTIVE TOOL

01 / Enter values

Your result

0.01 GB

1 MB = 0.001 GB

Common conversions

1 MB → 0.001 GB
5 MB → 0.005 GB
10 MB → 0.01 GB
50 MB → 0.05 GB
100 MB → 0.1 GB

Storage uses decimal units (1 KB = 1,000 bytes). Data transfer rates (Mbps and MB/s) are converted to each other; they represent rates, not storage quantities.

QUICK ANSWER

1 terabyte (TB) = 1,000 gigabytes (GB), and 1 GB = 1,000 megabytes (MB), so an MB is much smaller than a GB. Operating systems that count in binary show 1 GiB = 1,024 MiB, which is why a "1 TB" drive appears as about 931 GB.

THE METHOD

How it works

Decimal storage: 1 KB = 1,000 bytes; 1 MB = 1,000,000 bytes. Transfer speed: 8 Mbps = 1 MB/s. Speeds should only be compared with speeds.

PUT IT TO USE

Example calculation

10 bit = 0.000001 MB. Change the amount or swap the units above to calculate your own value.

QUICK REFERENCE

Conversion tables

TB to GB
TBGB
0.5 TB500 GB
1 TB1,000 GB
2 TB2,000 GB
4 TB4,000 GB
8 TB8,000 GB
16 TB16,000 GB
MB to GB
MBGB
100 MB0.1 GB
500 MB0.5 GB
1,000 MB1 GB
2,500 MB2.5 GB
5,000 MB5 GB

Is MB bigger than GB?

No. A gigabyte is 1,000 times larger than a megabyte. The order from smallest to largest is bit, byte, kilobyte (KB), megabyte (MB), gigabyte (GB), terabyte (TB) and petabyte (PB), each step 1,000 times the last.

Why does my 1 TB drive show 931 GB?

Drive makers count 1 TB as 1,000,000,000,000 bytes. Some operating systems, such as Windows, divide by 1,024 three times instead of 1,000, and still call the result GB. 10^12 ÷ 1,024³ is about 931, so no space is missing; the two sides simply use different units.

Drive makers use decimal units (1 TB = 10¹² bytes) while Windows reports binary units (1 GiB = 2³⁰ bytes) but labels them "GB". 10¹² ÷ 2³⁰ = 931.3, so no space is missing.

Storage vs internet speed

Internet speeds are in megabits per second (Mbps), not megabytes. Divide by 8: a 100 Mbps connection downloads about 12.5 MB per second.

In short

How to use the Data Converter

  1. Type the amount, for example 10 bit.
  2. Pick the unit you want, for example MB.
  3. Use the swap button to convert the other way, and the decimal places setting to round the answer.
  4. Read the result. It updates as you type, so you can change any value and compare.

Quick reference

MB to bit

MBbit
0.5 MB4,000,000 bit
1 MB8,000,000 bit
2 MB16,000,000 bit
5 MB40,000,000 bit
10 MB80,000,000 bit
25 MB200,000,000 bit
50 MB400,000,000 bit
100 MB800,000,000 bit
250 MB2,000,000,000 bit
1,000 MB8,000,000,000 bit
Screenshot of the Data Converter on this site with a worked example filled in
Screenshot: the Data Converter with the example values entered.

Accuracy

How we checked this

We compared 4 results from this calculator with values we worked out independently, using exact decimal arithmetic and the published definitions, on October 26, 2026. 4 of 4 matched to the precision shown.

InputIndependent valueThis pageMatch
1 TB → GB1,0001,000Yes
1 GB → MB1,0001,000Yes
8 bit → B11Yes
2,500 MB → GB2.52.5Yes

From the source

NIST Special Publication (SP) 811, Appendix B is an essential source when exact unit conversion factors are needed.

Source: NIST: Unit conversion

Sources

GOOD TO KNOW

Frequently asked questions

How many GB are in a TB?

1,000 GB in decimal units (or 1,024 GiB in binary units).

Is MB bigger than GB?

No, 1 GB equals 1,000 MB.

How is this conversion calculated?

Decimal storage: 1 KB = 1,000 bytes; 1 MB = 1,000,000 bytes. Transfer speed: 8 Mbps = 1 MB/s. Speeds should only be compared with speeds.

Can I reverse the conversion?

Yes. Select the swap button between the fields to reverse the source and destination units instantly.

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