Convert Terabyte to Gigabyte
1 terabyte = 1,000 gigabyte (GB). For example, 10 terabyte = 10,000 gigabyte and 100 terabyte = 100,000 gigabyte. Type any value below to convert terabyte to gigabyte both ways — it runs entirely in your browser.
Quick answer: Terabyte to Gigabyte
1 Terabyte = 1,000 Gigabyte (TB → GB). To convert terabyte to gigabyte, multiply by 1,000. To convert gigabyte to terabyte, multiply by 0.001. 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 terabyte-to-gigabyte questions.
How to convert Terabyte to Gigabyte
To convert terabyte to gigabyte, multiply the number of terabyte by the conversion factor 1,000, because 1 TB = 1,000 GB. The conversion is linear, so the same factor works for any value — whole numbers, decimals or fractions. For the reverse direction, 1 GB = 0.001 TB, so you divide by 1,000 (or multiply by 0.001) to turn gigabyte back into terabyte.
GB = TB × 1,000 ·
TB = GB × 0.001
- Write down the value you want to convert, in terabyte.
- Multiply it by 1,000.
- The result is the same area/length/quantity expressed in gigabyte.
Terabyte to Gigabyte — worked examples
Each row shows the exact arithmetic so you can follow the conversion step by step. For example, 5 terabyte is 5,000 gigabyte because 5 TB × 1,000 = 5,000 GB.
| Terabyte | Calculation | Gigabyte |
|---|---|---|
| 1 TB | 1 TB × 1,000 = 1,000 GB | 1,000 GB |
| 2 TB | 2 TB × 1,000 = 2,000 GB | 2,000 GB |
| 3 TB | 3 TB × 1,000 = 3,000 GB | 3,000 GB |
| 5 TB | 5 TB × 1,000 = 5,000 GB | 5,000 GB |
| 7 TB | 7 TB × 1,000 = 7,000 GB | 7,000 GB |
| 10 TB | 10 TB × 1,000 = 10,000 GB | 10,000 GB |
| 12 TB | 12 TB × 1,000 = 12,000 GB | 12,000 GB |
| 15 TB | 15 TB × 1,000 = 15,000 GB | 15,000 GB |
| 20 TB | 20 TB × 1,000 = 20,000 GB | 20,000 GB |
| 25 TB | 25 TB × 1,000 = 25,000 GB | 25,000 GB |
| 50 TB | 50 TB × 1,000 = 50,000 GB | 50,000 GB |
| 100 TB | 100 TB × 1,000 = 100,000 GB | 100,000 GB |
Common Terabyte to Gigabyte conversions
These are the terabyte-to-gigabyte values people look up most often. Every figure is computed from the exact factor, so you can rely on them for quick reference:
- 1 terabyte = 1,000 gigabyte
- 2 terabyte = 2,000 gigabyte
- 2.5 terabyte = 2,500 gigabyte
- 3 terabyte = 3,000 gigabyte
- 4 terabyte = 4,000 gigabyte
- 5 terabyte = 5,000 gigabyte
- 6 terabyte = 6,000 gigabyte
- 7 terabyte = 7,000 gigabyte
- 8 terabyte = 8,000 gigabyte
- 9 terabyte = 9,000 gigabyte
- 10 terabyte = 10,000 gigabyte
- 12 terabyte = 12,000 gigabyte
- 15 terabyte = 15,000 gigabyte
- 20 terabyte = 20,000 gigabyte
- 25 terabyte = 25,000 gigabyte
- 30 terabyte = 30,000 gigabyte
- 50 terabyte = 50,000 gigabyte
- 75 terabyte = 75,000 gigabyte
- 100 terabyte = 100,000 gigabyte
- 200 terabyte = 200,000 gigabyte
- 500 terabyte = 500,000 gigabyte
- 1000 terabyte = 1,000,000 gigabyte
Terabyte to Gigabyte conversion chart (both directions)
The chart below converts terabyte to gigabyte and gigabyte to terabyte side by side, so it works whichever way you need. 1 terabyte = 1,000 gigabyte, and 1 gigabyte = 0.001 terabyte.
| Terabyte → Gigabyte | Gigabyte → Terabyte |
|---|---|
| 0.25 TB = 250 GB | 0.25 GB = 0.00025 TB |
| 0.5 TB = 500 GB | 0.5 GB = 0.0005 TB |
| 1 TB = 1,000 GB | 1 GB = 0.001 TB |
| 2 TB = 2,000 GB | 2 GB = 0.002 TB |
| 3 TB = 3,000 GB | 3 GB = 0.003 TB |
| 4 TB = 4,000 GB | 4 GB = 0.004 TB |
| 5 TB = 5,000 GB | 5 GB = 0.005 TB |
| 6 TB = 6,000 GB | 6 GB = 0.006 TB |
| 7 TB = 7,000 GB | 7 GB = 0.007 TB |
| 8 TB = 8,000 GB | 8 GB = 0.008 TB |
| 9 TB = 9,000 GB | 9 GB = 0.009 TB |
| 10 TB = 10,000 GB | 10 GB = 0.01 TB |
| 12 TB = 12,000 GB | 12 GB = 0.012 TB |
| 15 TB = 15,000 GB | 15 GB = 0.015 TB |
| 20 TB = 20,000 GB | 20 GB = 0.02 TB |
| 25 TB = 25,000 GB | 25 GB = 0.025 TB |
| 30 TB = 30,000 GB | 30 GB = 0.03 TB |
| 40 TB = 40,000 GB | 40 GB = 0.04 TB |
| 50 TB = 50,000 GB | 50 GB = 0.05 TB |
| 75 TB = 75,000 GB | 75 GB = 0.075 TB |
| 100 TB = 100,000 GB | 100 GB = 0.1 TB |
| 150 TB = 150,000 GB | 150 GB = 0.15 TB |
| 200 TB = 200,000 GB | 200 GB = 0.2 TB |
| 250 TB = 250,000 GB | 250 GB = 0.25 TB |
| 500 TB = 500,000 GB | 500 GB = 0.5 TB |
| 1000 TB = 1,000,000 GB | 1000 GB = 1 TB |
Terabyte vs Gigabyte: 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 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.
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.
Convert 1 Terabyte to other units
It can help to see a terabyte next to the other units it is commonly compared with. 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 |
Convert 1 Gigabyte to other units
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 |
Tips for converting Terabyte to Gigabyte
- To go from terabyte to gigabyte, multiply by 1,000; to go back, divide by 1,000 (or multiply by 0.001).
- For a quick mental estimate, remember that 1 terabyte ≈ 1,000 gigabyte, so 10 terabyte ≈ 10,000 gigabyte.
- 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 Terabyte to Gigabyte converter
Type a number into the Terabyte field and the equivalent in Gigabyte 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 Gigabyte field to convert the other way (gigabyte to terabyte). 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 TB = 1,000 GB), 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 terabyte-to-gigabyte 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 gigabyte are in 1 terabyte?
- 1 terabyte = 1,000 gigabyte (GB). To convert any number of terabyte to gigabyte, multiply by 1,000.
- How do I convert terabyte to gigabyte?
- Multiply the number of terabyte by 1,000. For example, 10 terabyte = 10 × 1,000 = 10,000 gigabyte, and 25 terabyte = 25,000 gigabyte.
- How many terabyte are in 1 gigabyte?
- 1 gigabyte = 0.001 terabyte. So to convert gigabyte back to terabyte, multiply by 0.001.
- What is the formula to convert terabyte to gigabyte?
- gigabyte = terabyte × 1,000. The reverse formula is terabyte = gigabyte × 0.001.
- How much is 100 terabyte in gigabyte?
- 100 terabyte = 100,000 gigabyte. (And 1000 terabyte = 1,000,000 gigabyte.)
- Which is bigger, a terabyte or a gigabyte?
- A terabyte is larger: 1 terabyte = 1,000 gigabyte.
- Is this terabyte to gigabyte converter accurate?
- Yes — every value is computed from the exact 1,000 GB per TB factor (not rounded look-up tables), and the factors are re-verified automatically on every update.
- Can I convert gigabyte to terabyte too?
- Yes. The converter works both ways — enter a value in either field. 1 gigabyte = 0.001 terabyte.