GB to TB Storage Converter

By Suraj GiriUpdated 16 September 2026

In decimal storage units 1 TB is 1,000 GB, so divide gigabytes by 1,000 to get terabytes. In binary units 1 TiB is 1,024 GiB.

This page converts storage from gigabytes to terabytes and leads with the decimal answer, because GB and TB carry SI prefixes, which stand strictly for powers of ten. The binary answer beside it is the count Windows File Explorer shows under the same TB label.

Going the other way? Convert TB back to GB →

How do you convert GB to TB?

GB to TB conversion divides by 1,000, because one terabyte is 1,000 gigabytes in the decimal prefixes; in binary units one tebibyte is 1,024 gibibytes, so the divisor becomes 1,024.

1. Type the number of gigabytes into the box at the top of the page.
2. Divide it by 1,000, the number of gigabytes in one terabyte.
3. Read the decimal answer in TB, the reading the symbols GB and TB carry in the SI.
4. If the figure was counted in steps of 1,024, read the binary answer beside it instead: the same number divided by 1,024, in TiB.

Gigabytes and terabytes are two rungs of one ladder; to work across the whole storage ladder, including the binary units, use the full storage converter.

GB to TB Conversion Table

Each row gives the decimal answer and, beside it, the binary answer for the same figure read as GiB. Every value in it is exact.

Worked Example: 500 GB to TB

The first question for this page, worked both ways. Each reading passes through bytes, which is where the two part company.

A gigabyte is 1,000,000,000 bytes and a gibibyte is 1,073,741,824, so the same figure lands on two different byte counts before it is divided again.

Check it in reverse

Run each answer back through its own step and the starting figure returns: 0.5 TB x 1,000 = 500 GB, and 0.48828125 TiB x 1,024 = 500 GiB. To verify any other value, read the terabytes back as gigabytes and compare the result with the figure you started from.

Worked Examples: GB to TB

Each example gives the value first, then the working. Click a value to load it in the converter.

Every example above runs the other way too - turn each TB answer back into GB.

Where These Factors Come From

The factors and rules above are read from the knowledge base rather than typed for the page. These are the lines it holds for this pair.

• gigabyte (decimal), factor to byte 1000000000
• terabyte (decimal), factor to byte 1000000000000
• gibibyte, factor to byte 1073741824
• tebibyte, factor to byte 1099511627776
• SI Brochure (BIPM 9th edition) section 3, prefix rule The SI prefixes refer strictly to powers of 10. They should not be used to indicate powers of 2 (for example, one kilobit represents 1000 bits and not 1024 bits).
• binary prefixes, adoption The prefixes kibi (Ki), mebi (Mi), gibi (Gi) and tebi (Ti) stand for 2^10, 2^20, 2^30 and 2^40. The IEC first adopted them in 1999, as Amendment 2 to IEC 60027-2, and they are now part of IEC 80000-13.
• How this page reports a result result in the target unit, decimal (SI) reading first and binary (IEC) reading beside it where the prefixes differ; printed in full where it fits in 10 significant figures, otherwise rounded to 10

Why Does a 1 TB Drive Show About 931 GB?

A drive sold as 1 TB holds 1 000 000 000 000 bytes, which is 931.3225746 GiB, so a system that counts in steps of 1024 and labels the result GB shows it as about 931 GB.

No storage is missing: the bytes are the same and only the unit they are counted in has changed. This converter changes the unit and nothing else, so it says nothing about the space a formatted drive gives up to its file system.

Frequently Asked Questions

Related Conversions

• GB to MB multiplies by 1,000 - turn gigabytes into megabytes.
• GB to KB multiplies by 1,000,000 - turn gigabytes into kilobytes.
• MB to GB divides by 1,000 - turn megabytes into gigabytes.
• KB to GB divides by 1,000,000 - turn kilobytes into gigabytes.
• KB to MB divides by 1,000 - turn kilobytes into megabytes.
• MB to KB multiplies by 1,000 - turn megabytes into kilobytes.

The other storage units, including bits and the binary units, are on the converter that holds every storage unit.