Convert Gigabyte to Terabyte
1 gigabyte = 0.001 terabyte (TB). For example, 10 gigabyte = 0.01 terabyte and 100 gigabyte = 0.1 terabyte. Type any value below to convert gigabyte to terabyte both ways — it runs entirely in your browser.
Quick answer: Gigabyte to Terabyte
1 Gigabyte = 0.001 Terabyte (GB → TB). To convert gigabyte to terabyte, multiply by 0.001. To convert terabyte to gigabyte, multiply by 1,000. The converter at the top does this instantly and both ways; the sections below give the formula, worked examples, a full conversion chart and answers to the most common gigabyte-to-terabyte questions.
How to convert Gigabyte to Terabyte
To convert gigabyte to terabyte, multiply the number of gigabyte by the conversion factor 0.001, because 1 GB = 0.001 TB. The conversion is linear, so the same factor works for any value — whole numbers, decimals or fractions. For the reverse direction, 1 TB = 1,000 GB, so you divide by 0.001 (or multiply by 1,000) to turn terabyte back into gigabyte.
TB = GB × 0.001 ·
GB = TB × 1,000
- Write down the value you want to convert, in gigabyte.
- Multiply it by 0.001.
- The result is the same area/length/quantity expressed in terabyte.
Gigabyte to Terabyte — worked examples
Each row shows the exact arithmetic so you can follow the conversion step by step. For example, 5 gigabyte is 0.005 terabyte because 5 GB × 0.001 = 0.005 TB.
| Gigabyte | Calculation | Terabyte |
|---|---|---|
| 1 GB | 1 GB × 0.001 = 0.001 TB | 0.001 TB |
| 2 GB | 2 GB × 0.001 = 0.002 TB | 0.002 TB |
| 3 GB | 3 GB × 0.001 = 0.003 TB | 0.003 TB |
| 5 GB | 5 GB × 0.001 = 0.005 TB | 0.005 TB |
| 7 GB | 7 GB × 0.001 = 0.007 TB | 0.007 TB |
| 10 GB | 10 GB × 0.001 = 0.01 TB | 0.01 TB |
| 12 GB | 12 GB × 0.001 = 0.012 TB | 0.012 TB |
| 15 GB | 15 GB × 0.001 = 0.015 TB | 0.015 TB |
| 20 GB | 20 GB × 0.001 = 0.02 TB | 0.02 TB |
| 25 GB | 25 GB × 0.001 = 0.025 TB | 0.025 TB |
| 50 GB | 50 GB × 0.001 = 0.05 TB | 0.05 TB |
| 100 GB | 100 GB × 0.001 = 0.1 TB | 0.1 TB |
Common Gigabyte to Terabyte conversions
These are the gigabyte-to-terabyte values people look up most often. Every figure is computed from the exact factor, so you can rely on them for quick reference:
- 1 gigabyte = 0.001 terabyte
- 2 gigabyte = 0.002 terabyte
- 2.5 gigabyte = 0.0025 terabyte
- 3 gigabyte = 0.003 terabyte
- 4 gigabyte = 0.004 terabyte
- 5 gigabyte = 0.005 terabyte
- 6 gigabyte = 0.006 terabyte
- 7 gigabyte = 0.007 terabyte
- 8 gigabyte = 0.008 terabyte
- 9 gigabyte = 0.009 terabyte
- 10 gigabyte = 0.01 terabyte
- 12 gigabyte = 0.012 terabyte
- 15 gigabyte = 0.015 terabyte
- 20 gigabyte = 0.02 terabyte
- 25 gigabyte = 0.025 terabyte
- 30 gigabyte = 0.03 terabyte
- 50 gigabyte = 0.05 terabyte
- 75 gigabyte = 0.075 terabyte
- 100 gigabyte = 0.1 terabyte
- 200 gigabyte = 0.2 terabyte
- 500 gigabyte = 0.5 terabyte
- 1000 gigabyte = 1 terabyte
Gigabyte to Terabyte conversion chart (both directions)
The chart below converts gigabyte to terabyte and terabyte to gigabyte side by side, so it works whichever way you need. 1 gigabyte = 0.001 terabyte, and 1 terabyte = 1,000 gigabyte.
| Gigabyte → Terabyte | Terabyte → Gigabyte |
|---|---|
| 0.25 GB = 0.00025 TB | 0.25 TB = 250 GB |
| 0.5 GB = 0.0005 TB | 0.5 TB = 500 GB |
| 1 GB = 0.001 TB | 1 TB = 1,000 GB |
| 2 GB = 0.002 TB | 2 TB = 2,000 GB |
| 3 GB = 0.003 TB | 3 TB = 3,000 GB |
| 4 GB = 0.004 TB | 4 TB = 4,000 GB |
| 5 GB = 0.005 TB | 5 TB = 5,000 GB |
| 6 GB = 0.006 TB | 6 TB = 6,000 GB |
| 7 GB = 0.007 TB | 7 TB = 7,000 GB |
| 8 GB = 0.008 TB | 8 TB = 8,000 GB |
| 9 GB = 0.009 TB | 9 TB = 9,000 GB |
| 10 GB = 0.01 TB | 10 TB = 10,000 GB |
| 12 GB = 0.012 TB | 12 TB = 12,000 GB |
| 15 GB = 0.015 TB | 15 TB = 15,000 GB |
| 20 GB = 0.02 TB | 20 TB = 20,000 GB |
| 25 GB = 0.025 TB | 25 TB = 25,000 GB |
| 30 GB = 0.03 TB | 30 TB = 30,000 GB |
| 40 GB = 0.04 TB | 40 TB = 40,000 GB |
| 50 GB = 0.05 TB | 50 TB = 50,000 GB |
| 75 GB = 0.075 TB | 75 TB = 75,000 GB |
| 100 GB = 0.1 TB | 100 TB = 100,000 GB |
| 150 GB = 0.15 TB | 150 TB = 150,000 GB |
| 200 GB = 0.2 TB | 200 TB = 200,000 GB |
| 250 GB = 0.25 TB | 250 TB = 250,000 GB |
| 500 GB = 0.5 TB | 500 TB = 500,000 GB |
| 1000 GB = 1 TB | 1000 TB = 1,000,000 GB |
Gigabyte vs Terabyte: which is bigger?
A terabyte is the larger unit: one terabyte equals 1,000 gigabytes. Put another way, you need 1,000 gigabytes to make a single terabyte.
What is a Gigabyte? History, origin and usage
The gigabyte is a billion bytes in decimal (SI “giga”), but in binary usage it has meant 1,073,741,824 bytes (1,024 cubed). The gap between the two meanings grows with each step up the prefix ladder, which is why the gigabyte is where the decimal-versus-binary dispute becomes very visible to ordinary users.
Gigabytes are the everyday unit for RAM, phone and computer storage, mobile-data allowances and large downloads. Hard-drive and SSD makers sell capacity in decimal gigabytes of 1,000,000,000 bytes each.
The binary unit — 1,073,741,824 bytes — is properly the gibibyte (GiB), about 7% larger than a decimal gigabyte. That 7% is why a drive sold as “1,000 GB” can show up as only about 931 “GB” in some operating systems, a mismatch that has even prompted lawsuits.
What is a Terabyte? History, origin and usage
The terabyte is a trillion bytes in the decimal SI convention (the “tera” prefix), while binary usage takes it to mean 1,099,511,627,776 bytes (1,024 to the fourth power). It is the scale at which consumer storage now commonly arrives, and where the decimal-versus-binary gap reaches roughly 10%.
Terabytes measure modern hard drives, large SSDs, NAS boxes and backup archives, plus the data appetites of video, photo libraries and games. Storage is advertised in decimal terabytes (1 TB = 1,000,000,000,000 bytes).
The binary 1,024-to-the-fourth-power unit is the tebibyte (TiB), about 10% larger than a decimal terabyte. So a “1 TB” drive typically shows as roughly 931 GiB once an operating system counts it in binary units.
Convert 1 Gigabyte to other units
It can help to see a gigabyte next to the other units it is commonly compared with. One gigabyte (GB) is equal to:
| 1 Gigabyte equals | Unit |
|---|---|
| 8,000,000,000 bit | Bit |
| 1,000,000,000 B | Byte |
| 1,000,000 KB | Kilobyte |
| 1,000 MB | Megabyte |
| 0.001 TB | Terabyte |
| 976,562.5 KiB | Kibibyte |
| 953.6743 MiB | Mebibyte |
| 0.9313226 GiB | Gibibyte |
Convert 1 Terabyte to other units
One terabyte (TB) is equal to:
| 1 Terabyte equals | Unit |
|---|---|
| 8,000,000,000,000 bit | Bit |
| 1,000,000,000,000 B | Byte |
| 1,000,000,000 KB | Kilobyte |
| 1,000,000 MB | Megabyte |
| 1,000 GB | Gigabyte |
| 976,562,500 KiB | Kibibyte |
| 953,674.3 MiB | Mebibyte |
| 931.3226 GiB | Gibibyte |
Tips for converting Gigabyte to Terabyte
- To go from gigabyte to terabyte, multiply by 0.001; to go back, divide by 0.001 (or multiply by 1,000).
- For a quick mental estimate, remember that 1 gigabyte ≈ 0.001 terabyte, so 10 gigabyte ≈ 0.01 terabyte.
- The converter above keeps full precision; the tables round for readability, so use the tool for exact figures.
- Both fields update live as you type — change either side to convert in that direction.
How to use this Gigabyte to Terabyte converter
Type a number into the Gigabyte field and the equivalent in Terabyte appears instantly — there is no “convert” button to press and nothing is sent to a server, so it works offline once the page has loaded and is safe for any data. You can also type into the Terabyte field to convert the other way (terabyte to gigabyte). Use the swap control to flip the two units, and copy the result with a single click. Because the calculation runs in your browser with full floating-point precision, the converter is more exact than the rounded figures shown in the reference chart above — use the chart for quick look-ups and the tool for precise work.
Accuracy and method
Every figure on this page — the formula, the worked examples, the conversion chart and the “convert to other units” tables — is computed from a single verified conversion factor (1 GB = 0.001 TB), never copied from a hand-typed lookup table that could drift. That factor is derived from each unit’s definition in terms of a common base unit, and an automated check re-verifies all of the site’s factors on every update, so the numbers here stay correct over time. This matters for gigabyte-to-terabyte conversions because a small rounding error in a published table compounds quickly at larger quantities; computing from the exact factor avoids that.
Sources
- NIST — Prefixes for binary multiples — the reference that separates the decimal prefixes (kB = 1,000 bytes) from the IEC binary ones (KiB = 1,024 bytes). This page keeps the two apart rather than silently mixing them, which is the usual source of disagreement between file sizes.
- BIPM — The International System of Units (SI Brochure) — the defining document for the SI, published by the International Bureau of Weights and Measures. It fixes the base unit that this conversion resolves to, which is why the factor here can be exact rather than approximate.
This converter uses the <strong>decimal (SI)</strong> convention for KB/MB/GB/TB (1 KB = 1,000 bytes), as used by storage manufacturers and networks. The <strong>binary</strong> units — KiB, MiB, GiB (1 KiB = 1,024 bytes) — are listed separately, because operating systems often label binary sizes with the decimal names.
Frequently asked questions
- How many terabyte are in 1 gigabyte?
- 1 gigabyte = 0.001 terabyte (TB). To convert any number of gigabyte to terabyte, multiply by 0.001.
- How do I convert gigabyte to terabyte?
- Multiply the number of gigabyte by 0.001. For example, 10 gigabyte = 10 × 0.001 = 0.01 terabyte, and 25 gigabyte = 0.025 terabyte.
- How many gigabyte are in 1 terabyte?
- 1 terabyte = 1,000 gigabyte. So to convert terabyte back to gigabyte, multiply by 1,000.
- What is the formula to convert gigabyte to terabyte?
- terabyte = gigabyte × 0.001. The reverse formula is gigabyte = terabyte × 1,000.
- How much is 100 gigabyte in terabyte?
- 100 gigabyte = 0.1 terabyte. (And 1000 gigabyte = 1 terabyte.)
- Which is bigger, a gigabyte or a terabyte?
- A terabyte is larger: 1 terabyte = 1,000 gigabyte.
- Is this gigabyte to terabyte converter accurate?
- Yes — every value is computed from the exact 0.001 TB per GB factor (not rounded look-up tables), and the factors are re-verified automatically on every update.
- Can I convert terabyte to gigabyte too?
- Yes. The converter works both ways — enter a value in either field. 1 terabyte = 1,000 gigabyte.