How do you convert gigabytes to terabytes?

To convert gigabytes (GB) to terabytes (TB), multiply the data size in gigabytes by 0.001 (terabytes = gigabytes × 0.001).

What is 2000 gigabytes in terabytes?

2000 gigabytes (2000 GB) is equal to 2 terabytes (2 TB).

Which is larger, 1 gigabyte (decimal) (GB) or 1 terabyte (decimal) (TB)?

One terabyte (decimal) (TB) is larger than one gigabyte (decimal) (GB). Specifically, 1 TB equals 1,000 GB, while 1 GB is 0.001 TB.

How do I convert back from terabytes (TB) to gigabytes (GB)?

To reverse the calculation from TB to GB, multiply your terabyte (decimal) value by the inverse factor 1,000 (or divide by 0.001). You can also click the Swap button in the tool above to flip directions in one click.

Are there regional or standard differences when converting GB and TB?

Decimal SI (Base-10) vs. Binary IEC (Base-2) & Bits vs. Bytes: Networking speeds and storage drive manufacturers use SI decimal prefixes (1 kB = 1,000 bytes, 1 MB = 1,000,000 bytes, 1 GB = 10⁹ bytes), whereas operating systems and RAM often report binary IEC prefixes (1 KiB = 1,024 bytes, 1 MiB = 1,048,576 bytes, 1 GiB = 1,073,741,824 bytes). Also note that lowercase 'b' denotes bits while uppercase 'B' denotes Bytes (1 Byte = 8 bits).

Gigabytes to Terabytes Converter

Enter the data size in gigabytes below to convert it to terabytes.

Terabytes to Gigabytes (TB → GB)

Convert Gigabytes to Terabytes

Enter a value in gigabytes (GB) to convert to terabytes (TB).

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2terabytes

2000 GB = 2 TB

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Suggested Conversions

Reference:NIST / IEC (IEC 80000-13 Binary Prefixes)

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Gigabyte to Terabyte Conversion Table

Table showing various gigabyte measurements converted to terabytes. Click any preset value or arrow to load it into the converter.

Gigabytes (GB)	Terabytes (TB)
1 GB	0.001 TB
2 GB	0.002 TB
5 GB	0.005 TB
10 GB	0.01 TB
15 GB	0.015 TB
20 GB	0.02 TB
25 GB	0.025 TB
30 GB	0.03 TB
50 GB	0.05 TB
75 GB	0.075 TB

How to Convert Gigabytes to Terabytes

To convert gigabytes to terabytes, multiply the data size by the following conversion ratio: 0.001 terabytes/gigabyte.

Since one gigabyte is equal to 0.001 terabytes, you can use this simple formula to convert:

terabytes = gigabytes × 0.001

The data size in terabytes is equal to the data size in gigabytes multiplied by 0.001.

For example, here's how to convert 2000 gigabytes to terabytes using the formula above.

terabytes = (2000 GB × 0.001) = 2 TB

How Many Terabytes Are in a Gigabyte?

There are 0.001 terabytes in a gigabyte, which is why we use this value in the formula above.

1 GB = 0.001 TB|1 TB = 1,000 GB

Our gigabyte to terabyte calculator automatically converts your data size measurements with full decimal and scientific precision across US customary, imperial, and SI metric standards.

Gigabytes and terabytes are both units used to measure data size. Keep reading to learn more about each unit.

What Is a Gigabyte?

A gigabyte is a unit of data size equal to 1,000,000,000 bytes (B), the base unit for data size. SI decimal standard: 1,000,000,000 bytes. [1]

The gigabyte is classified as a metric and SI-compatible unit of data size. Gigabytes can be abbreviated as GB; for example, 1 gigabyte can be written as 1 GB.

In the metric system, "giga" is the standard SI prefix for billions, or 10⁹. This makes the gigabyte (GB) a convenient decimal multiple of the byte (B).

In practice, gigabytes (GB) are widely used across large-scale industrial, bulk, and macro-level data size specifications within SI metric workflows, engineering documentation, and technical data sheets.

Learn more about gigabytes in our Digital Storage Converter.

What Is a Terabyte?

A terabyte is a unit of data size equal to 1e+12 bytes (B), the base unit for data size. SI decimal standard: 1,000,000,000,000 bytes (1,000 GB). [2]

The terabyte is classified as a metric and SI-compatible unit of data size. Terabytes can be abbreviated as TB; for example, 1 terabyte can be written as 1 TB.

In the metric system, "tera" is the standard SI prefix for trillions, or 10¹². This makes the terabyte (TB) a convenient decimal multiple of the byte (B).

In practice, terabytes (TB) are widely used across large-scale industrial, bulk, and macro-level data size specifications within SI metric workflows, engineering documentation, and technical data sheets.

Learn more about terabytes in our Digital Storage Converter.

When converting data size between gigabytes (GB) and terabytes (TB), keep full floating-point precision (1 GB = 0.001 TB; 1 TB = 1,000 GB) during intermediate calculations and round only the final terabyte figure to match your instrument tolerance.

More Gigabyte & Terabyte Conversions

Need to calculate in the opposite direction? Use our terabytes to gigabytes converter (TB to GB) to switch your starting unit immediately. You can also explore related tools such as converting gigabytes to megabytes, converting gigabytes to kilobytes, or converting megabytes to gigabytes.

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Frequently Asked Questions

There are 0.001 terabytes (TB) in 1 gigabyte (GB). Conversely, 1 terabyte (TB) is equal to 1,000 gigabytes (GB).

Digital Storage Converter

Quick Info

Direct Factor: 1 gigabyte (decimal) (GB) equals 0.001 terabytes (TB).
Inverse Factor: 1 terabyte (decimal) (TB) equals 1,000 gigabytes (GB).
Formula: terabytes = gigabytes ÷ 1000.
Standard Note: Decimal SI (Base-10) vs. Binary IEC (Base-2) & Bits vs. Bytes: Networking speeds and storage drive manufacturers use SI decimal prefixes (1 kB = 1,000 bytes, 1 MB = 1,000,000 bytes, 1 GB = 10⁹ bytes), whereas operating systems and RAM often report binary IEC prefixes (1 KiB = 1,024 bytes, 1 MiB = 1,048,576 bytes, 1 GiB = 1,073,741,824 bytes). Also note that lowercase 'b' denotes bits while uppercase 'B' denotes Bytes (1 Byte = 8 bits).

Units Comparison

Gigabyte (Decimal) (GB)

SI decimal standard: 1,000,000,000 bytes.

Terabyte (Decimal) (TB)

SI decimal standard: 1,000,000,000,000 bytes (1,000 GB).

Byte (B)

8 binary bits.

References

[1]NIST / IEC · IEC 80000-13 Binary Prefixes
Source
[2]BIPM · SI Decimal Prefixes (k, M, G, T, P)
Source
[3]NIST CUU · SI Prefixes & Decimal Multiples
Source

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References

NIST · BIPM · ISO

[1]
NIST / IEC (IEC 80000-13 Binary Prefixes)·Digital Storage Metrology Standard — Gigabytes (GB) to Terabytes (TB)
NIST / IEC Standard
[2]
BIPM (SI Decimal Prefixes (k, M, G, T, P))·Unit Specifications: Gigabyte (Decimal) (GB) & Terabyte (Decimal) (TB)
BIPM Specification
[3]
NIST CUU (SI Prefixes & Decimal Multiples)·Conversion Factors & Mathematical Basis (GB to TB)
NIST CUU Reference

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