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Terabytes to Gigabytes

1 terabyte = 1,000 gigabytes · 1 GB = 0.001 TB

1 terabyte = 1,000 gigabytes

How it’s calculated

GB = TB × 1000

  • Multiply the value in terabytes by 1000.
  • To go back, divide by 1000 (or multiply by 0.001).
  • 1 TB = 1,000 GB · 1 GB = 0.001 TB
Show worked solutionFactor, unit cancellation and rounding, step by step

  1. Find the conversion factor

    By definition 1 TB = 8000000000000 bit and 1 GB = 8000000000 bit, so 1 TB = 1000 GB. Source: IEC 80000-13 (decimal and binary prefixes).

  2. Multiply by the factor written as a fraction

    Put TB in the denominator so it cancels, leaving GB.

  3. Calculate (unrounded)

  4. Round the answer

    Rounded to 5 significant figures.

Answer: 1000 GB

1 TB in other units

Batch convert TB → GB
Results
  1. 1 TB = 1000 GB
  2. 5 TB = 5000 GB
  3. 10 TB = 10000 GB
  4. 25 TB = 25000 GB

Permanent link to this conversion

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Quick examples

  • 1 terabyte = 1,000 gigabytes
  • 5 terabytes = 5,000 gigabytes
  • 10 terabytes = 10,000 gigabytes
  • 25 terabytes = 25,000 gigabytes
  • 100 terabytes = 100,000 gigabytes

About these units

Terabyte (TB)

SI (metric)

1 TB = 8000000000000 bit

Source: IEC 80000-13 (decimal and binary prefixes)

Gigabyte (GB)

SI (metric)

Decimal gigabyte: exactly 10⁹ bytes. Drive makers use this; Windows reports GiB but labels them "GB".

1 GB = 8000000000 bit

Source: IEC 80000-13 (decimal and binary prefixes)

Terabytes to gigabytes conversion table

terabyte (TB) to gigabyte (GB)
Terabytes (TB)Gigabytes (GB)
0.1 TB100 GB
0.5 TB500 GB
1 TB1,000 GB
2 TB2,000 GB
3 TB3,000 GB
4 TB4,000 GB
5 TB5,000 GB
6 TB6,000 GB
7 TB7,000 GB
8 TB8,000 GB
9 TB9,000 GB
10 TB10,000 GB
15 TB15,000 GB
20 TB20,000 GB
25 TB25,000 GB
30 TB30,000 GB
40 TB40,000 GB
50 TB50,000 GB
75 TB75,000 GB
100 TB100,000 GB
250 TB250,000 GB
500 TB500,000 GB
1,000 TB1,000,000 GB

Related conversions

Frequently asked questions

How do I convert terabytes to gigabytes?

Use GB = TB × 1000. Multiply the value in terabytes by 1000.

How many gigabytes are in 1 terabyte?

1 terabyte (TB) equals 1,000 gigabytes (GB).

How many terabytes are in 1 gigabyte?

1 gigabyte (GB) equals 0.001 terabytes (TB).

What is 10 TB in GB?

10 terabytes = 10,000 gigabytes.

What is a gigabyte?

Decimal gigabyte: exactly 10⁹ bytes. Drive makers use this; Windows reports GiB but labels them "GB".

Formula: GB = TB × 1000. Factors last reviewed 2026-10-27.