Aisha K.
Mar 12, 2026
Clean layout and the results update instantly. Exactly what I needed for a quick planning check.
Unit Converters
Gigabytes to Terabytes Converter (GB to TB)
Gigabytes (decimal)
GB → TB
1 TB
2,000 GB → 2 TB. A 500 GB SSD is 0.5 TB.
- You typed
- 1,000 GB
- One TB is
- 1,000 GB
- How it’s calculated
- TB = GB ÷ 1,000 (SI decimal).
Gigabytes (decimal) to Terabytes (decimal) conversion table
Common GB values in TB. Same factor as the converter above: TB = GB ÷ 1,000 (SI decimal).
| Gigabytes (decimal) | Terabytes (decimal) |
|---|---|
| 0.25 GB | 0.0003 TB |
| 0.5 GB | 0.0005 TB |
| 1 GB | 0.001 TB |
| 2 GB | 0.002 TB |
| 5 GB | 0.005 TB |
| 10 GB | 0.01 TB |
| 20 GB | 0.02 TB |
| 25 GB | 0.025 TB |
| 50 GB | 0.05 TB |
| 100 GB | 0.1 TB |
| 500 GB | 0.5 TB |
| 1,000 GB | 1 TB |
Plain-English guide
Terms & how it works
Confused by a field? Read the short definitions here while you use the tool.
Gigabytes (decimal)
The “Gigabytes (decimal)” value used in this tool’s formula. Adjust it to see results update live.
TB = GB ÷ 1,000 (SI decimal).
NAS shelves and video libraries. Divide GB by 1,000 for decimal TB. 4,000 GB is 4 TB on the box. macOS 10.12+ also uses decimal; older Windows “TB” was often tebibytes. Know which UI you are reading.
How this calculator works
NAS shelves and video libraries. Divide GB by 1,000 for decimal TB. 4,000 GB is 4 TB on the box. macOS 10.12+ also uses decimal; older Windows “TB” was often tebibytes. Know which UI you are reading. TB = GB ÷ 1,000 (SI decimal). Scenario: 2,000 GB → 2 TB. A 500 GB SSD is 0.5 TB.
TB = GB ÷ 1,000 (SI decimal).
Scenario: 2,000 GB → 2 TB. A 500 GB SSD is 0.5 TB.
When to use this Gigabytes to Terabytes
Common use cases
- NAS shelves and video libraries. Divide GB by 1,000 for decimal TB. 4,000 GB is 4 TB on the box. macOS 10.12+ also uses decimal; older Windows “TB” was often tebibytes. Know which UI you are reading.
- Sanity-check with this scenario: 2,000 GB → 2 TB. A 500 GB SSD is 0.5 TB.
- The relationship is: TB = GB ÷ 1,000 (SI decimal).
Localized examples
- Unit Converters: the example on this page uses the same formula as the widget.
What you get
- Fields: Gigabytes (decimal)
- TB = GB ÷ 1,000 (SI decimal).
- Scenario on the page: 2,000 GB → 2 TB. A 500 GB SSD is 0.5 TB.
How to Convert Gigabytes to Terabytes
- 1Enter Gigabytes (decimal). Use the values you have, not a catalog average, unless that is all you know.
- 2TB = GB ÷ 1,000 (SI decimal).
- 3Scenario: 2,000 GB → 2 TB. A 500 GB SSD is 0.5 TB.
- 4Check which dictionary the other person is using — US or UK, decimal or 1,024 — then trust the number.
Governing formula
TB = GB ÷ 1,000 (SI decimal).
2,000 GB → 2 TB. A 500 GB SSD is 0.5 TB.
2,000 GB → 2 TB. A 500 GB SSD is 0.5 TB.
Variable definitions
- value
Gigabytes (decimal)
The “Gigabytes (decimal)” field. Default 1000; typical range 0–10000000.
- The conversion (TB = GB ÷ 1,000 (SI decimal).) does not pick US vs UK gallons, SI vs binary megabytes, or Mach at altitude for you. Read the footnote on the page.
- Nothing here is uploaded for the calculation itself.
Frequently Asked Questions
Not on this page. See tebibytes to terabytes for the binary cousin.
Related calculators
Unit Converters
- Gibibytes to Gigabytes1 GiB = 2³⁰ bytes. 1 GB = 10⁹ bytes. Multiply GiB by 1.073741824. A 931 GiB “1 TB” disk is the classic unboxing surprise: 1,000,000,000,000 bytes ≈ 931 GiB.
- Gigabits to Gigabytes10 GbE and fiber quotes. Divide Gbps by 8. 10 Gbps is 1.25 GB/s — faster than many disks. A “gigabit” home plan is 1 Gbps = 0.125 GB/s, not a gigabyte a second. Sales teams enjoy that confusion.
- Megabytes to GigabytesDrive makers sell decimal GB (1,000 MB = 1 GB). Windows often shows GiB (1,024³). A “500 GB” disk showing 465 GB is not broken — it is two dictionaries. This page uses SI decimal: divide MB by 1,000.
- Tebibytes to Terabytes1 TiB = 2⁴⁰ bytes. 1 TB = 10¹² bytes. Multiply TiB by 1.0995. An 8 TiB volume in TrueNAS is 8.80 TB decimal. RAID-Z does not change the unit; it changes how many of them you keep.
- Terabytes to PetabytesDatacenter talk. 1,000 TB = 1 PB in SI. A 10,000 TB estate is 10 PB. Tape libraries and object stores quote this. Your laptop does not.
- Acres to HectaresUS farm ads in acres, EU paperwork in hectares. Divide acres by 2.471. Ten acres is 4.05 ha. A 160-acre quarter-section is 64.7 ha.
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Reviews & Ratings
See what others think about this tool, then leave your own rating to help improve CalculioHub.
4.8
out of 5.0
4 reviews
Daniel R.
Feb 28, 2026
Very usable on mobile. Would love a save/export option later, but the math feels solid.
Priya S.
Feb 3, 2026
The FAQ section answered my questions before I even had to search. Smooth dark mode too.
Marcus L.
Jan 19, 2026
Simple inputs, clear outputs. This replaced three bookmarks I used to juggle.
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