Terabytes to Gigabytes Converter

Convert terabytes to gigabytes and gigabytes to terabytes instantly. Bidirectional digital storage converter with formula and common values.

Terabytes to Gigabytes: 1 TB equals 1000 GB. To convert terabytes to gigabytes, multiply by 1000 (GB = TB × 1000). For example, 10 TB = 10000 GB.

How to Convert Terabytes to Gigabytes

To convert from terabytes to gigabytes, multiply the value by 1000. The conversion is linear, meaning doubling the input doubles the output.

Conversion Formula

Terabytes to Gigabytes: GB = TB × 1000
Gigabytes to Terabytes: TB = GB ÷ 1000

Terabytes to Gigabytes Conversion Chart

Terabytes (TB)	Gigabytes (GB)
0.1	100
0.25	250
0.5	500
1	1000
2	2000
3	3000
5	5000
10	10000
20	20000
25	25000
50	50000
100	100000
250	250000
1000	1000000

Understanding the Units

What is a Terabyte?

A terabyte equals one trillion bytes (10¹²).

Common contexts: hard drives, NAS storage, large datasets.

What is a Gigabyte?

A gigabyte equals one billion bytes (10⁹) in modern SI usage. Storage marketers use the SI definition; some operating systems (e.g., Windows) display the binary GiB (1,073,741,824 bytes) but label it "GB".

Common contexts: storage drives, mobile data plans.

Real-World Reference Points

Item	Terabytes (TB)	Gigabytes (GB)
Standard-definition movie	0.001	1
HD movie (Blu-ray)	0.025	25
Modern smartphone storage	0.256	256

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FAQ

How many gigabytes are in a terabyte?

One terabyte equals 1,000 gigabytes (decimal, the standard this converter uses). Operating systems sometimes report binary units, where 1 TiB = 1,024 GiB.

How do I convert TB to GB?

Multiply the number of terabytes by 1,000. For example, 2.5 TB × 1,000 = 2,500 GB.

Why does my 1 TB hard drive show less than 1 TB?

Manufacturers label drives using decimal (1 TB = 1,000 GB) but your OS reports in binary (1 TiB = 1,024 GiB). A "1 TB" drive shows as about 931 GiB.

How many TB are in a petabyte?

One petabyte equals 1,000 terabytes (decimal). In binary units, 1 PiB = 1,024 TiB.

How many gigabytes are in 1 terabyt?

1 TB equals 1000 GB.

How do you convert terabytes to gigabytes?

Multiply the terabyt value by 1000. Formula: GB = TB × 1000.

How many gigabytes are in 5 terabytes?

5 TB = 5000 GB.

How do you convert gigabytes back to terabytes?

Use the inverse formula: TB = GB ÷ 1000. For example, 1 GB = 0.001 TB.

What is the difference between Terabyt and Gigabyt?

A terabyte equals one trillion bytes (10¹²). A gigabyte equals one billion bytes (10⁹) in modern SI usage. Storage marketers use the SI definition; some operating systems (e.g., Windows) display the binary GiB (1,073,741,824 bytes) but label it "GB".