Explains the distinction between decimal prefixes such as MB and binary prefixes such as MiB.
Dedicated unit pair
Terabytes to Gigabytes
Convert TB to GB instantly, then review the formula, assumptions, and rounding guidance.
Data storageInstant result
Decimals
Formula result = input × 1000000000000 ÷ 1000000000. 1 TB = 1,000 GB
Common examples
One value, several units
Bytes1,000,000,000,000 B
Bits8,000,000,000,000 bit
Kilobytes1,000,000,000 kB
Megabytes1,000,000 MB
Gigabytes1,000 GB
Kibibytes976,562,500 KiB
Mebibytes953,674.3164 MiB
Gibibytes931.3226 GiB
Conversion table
| TB | GB |
|---|---|
| 1 TB | 1,000 GB |
| 2 TB | 2,000 GB |
| 5 TB | 5,000 GB |
| 10 TB | 10,000 GB |
| 25 TB | 25,000 GB |
| 50 TB | 50,000 GB |
| 100 TB | 100,000 GB |
Conversion chart
1 TB1,000 GB
5 TB5,000 GB
10 TB10,000 GB
25 TB25,000 GB
50 TB50,000 GB
Worked example
1 byte equals 8 bits.
Unit definition
Terabytes (TB) One terabytes equals 1,000,000,000,000 byte.
Unit history
Terabytes is represented here using its modern SI definition or an internationally accepted relationship to an SI base unit.
Step by step
1. Parse the value, including fractions.
2. Convert TB to byte.
3. Convert the base value to GB and apply your display precision.
Understand the result before using it
Terabytes to Gigabytes converts a value measured in Terabytes (TB) into the equivalent value in Gigabytes (GB). The numerical value changes because the size and definition of the selected unit changes; the underlying quantity does not.
Calculated result
The conversion follows the displayed unit relationship. Display rounding can hide additional digits, and measured inputs cannot become more accurate merely by changing units.
Formula, assumptions, and example
Formula
result = input × 1000000000000 ÷ 1000000000
Assumptions
- Terabytes and Gigabytes represent the same data storage quantity.
- The input is expressed in TB; the output is expressed in GB.
- The unit definitions and conventional relationship shown on this page apply.
Worked example
1 TB = 1,000 GB. For another value, apply the same relationship and round only to the precision your source measurement supports.
When to use it
Good uses
- Read a TB measurement in a document that expects GB.
- Compare a terabytes value with a value reported in gigabytes.
- Check the TB-to-GB arithmetic before copying the result into another calculation.
Limitations
Common mistakes to avoid
- Decimal kB/MB/GB and binary KiB/MiB/GiB use different multipliers and should not be treated as synonyms.
- Round the output to a precision justified by the original measurement.
- Verify safety-critical, regulated, laboratory, and contractual conversions against the controlling standard.
Sources and further reading
These references explain the underlying standards or provide authoritative context. Your own contract, institution, clinician, product documentation, local code, or governing standard may be the controlling source.
Guidance on unit names, symbols, conversions, and numerical presentation.
Questions about this calculation
How do I convert Terabytes to Gigabytes?
result = input × 1000000000000 ÷ 1000000000 Using the displayed relationship, 1 TB equals 1,000 GB.
How many Gigabytes are in one Terabytes?
One Terabytes is 1,000 Gigabytes. The displayed digits may be rounded.
Can I reverse the TB to GB conversion?
Yes. Swap the source and target units in the converter. The reverse relationship converts GB back to TB.
Is the Terabytes to Gigabytes result exact?
The conversion follows the displayed unit relationship. Display rounding can hide additional digits, and measured inputs cannot become more accurate merely by changing units.