GB to TB (decimal) converter

Gigabytes (GB) Terabytes (TB) ⇄

Formula: TB = GB ÷ 1000

GB	TB (decimal)
500	0.5
1000	1
1024	1.024
2048	2.048
5000	5
10000	10
20000	20

Context: Decimal (SI) units KB, MB, GB, TB use powers of 1000.

Definition: 1 TB = 1000 GB.

Formula: TB = GB ÷ 1000.

Example: 2048 GB ÷ 1000 = 2.048 TB (decimal).

Reverse conversion: GB = TB × 1000. For example, 3 TB × 1000 = 3000 GB. If you need to go further down the scale, you can first convert to GB and then use the GB to MB converter or MB to GB converter to adjust between gigabytes and megabytes.

Tip: Type in either the GB or TB field and use the swap button to reverse the calculation instantly.

Gigabytes (GB) and terabytes (TB) are common units for measuring digital storage. In the decimal (SI) system used by most manufacturers, 1 TB = 1000 GB. This is the convention you usually see on hard drive boxes, SSD product pages, and cloud storage plans.

When you buy a “1 TB” drive, it typically provides about 1000 GB in decimal terms. Operating systems may show slightly different numbers because they sometimes use binary units (GiB, TiB). If you want to stay strictly in decimal units, use this GB to TB converter together with tools like MB to GB (decimal) and GB to MB (decimal) to move between megabytes, gigabytes, and terabytes.

For smaller sizes, you might start from kilobytes or megabytes using KB to MB (decimal) and MB to KB (decimal). For very large datasets or backup strategies, converting GB to TB is useful when estimating how many external drives, NAS bays, or cloud terabytes you need.

1. Planning backups and storage arrays

If you know your total data in gigabytes (for example from a backup report), you can use this GB to TB converter to see how many terabytes of storage are required. For multi-disk setups, you can then compare the result with standard drive sizes listed in TB.

2. Comparing cloud storage plans

Many cloud services advertise allowances in TB, while local tools or file managers show sizes in GB. Converting GB to TB helps you decide whether a plan advertised as 2 TB, 5 TB or more actually covers your gigabyte usage. If you need to break that down further, try the Bytes to KB and KB to MB converters as well.

3. Estimating media libraries

Large media collections (photos, video, game installs) are often measured in hundreds or thousands of GB. Converting those gigabytes to TB makes it easier to talk about and compare different drives or cloud plans.