Terabyte to Gigabyte Converter
Convert TB to GB instantly. Free TB to GB calculator with formula, examples and FAQs.
Quick answer
1 TB equals 1000 GB. To convert TB to GB, multiply the TB value by 1000 — so 10 TB = 10000 GB. This factor is exact, and the reverse conversion (GB to TB) simply divides by 1000 instead of multiplying.
Converted value
1,000.00
1.00 TB = 1,000.00 GB
What is TB to GB?
TB to GB is a data conversion: the measured amount does not change, just the way it is expressed. It matters most to IT admins and power users. A single conversion factor (GB = TB × 1000) handles any value, large or small.
Real-world uses: why convert TB to GB?
Converting TB to GB bridges two ways of measuring the same thing. People do it most often when sizing hard drives and NAS storage, and on the receiving side when sizing video and backup files. Having the exact value — not a rough estimate — prevents costly mistakes in paperwork, purchases and planning.
- •Sizing hard drives and NAS storage.
- •Planning backup and archive capacity.
- •Estimating data-centre storage.
- •Comparing large cloud plans.
- •Sizing video and backup files.
Who uses this conversion?
How the TB to GB conversion is calculated
This is the same arithmetic that calculators and search engines use — no rounded shortcuts.
GB = TB × 1000
- Both TB and GB are defined in terms of the same base unit, the byte.
- 1 TB = 1.0000e+12 byte, and 1 GB = 1.0000e+9 byte.
- Divide one definition by the other to get the conversion factor: 1.0000e+12 ÷ 1.0000e+9 = 1000.
- So GB = TB × 1000. Multiply any TB value by 1000 to get the result in GB.
Precision: Using the decimal SI convention the factors are exact powers of ten, so the result is exact and rounded only for display.
Example calculations
- •1 TB = 1000 GB
- •2 TB = 2000 GB
- •4 TB = 4000 GB
TB to GB quick reference table
Common TB values converted to GB, each calculated with the exact factor.
| TB | GB |
|---|---|
| 10 | 10000 |
| 25 | 25000 |
| 50 | 50000 |
| 100 | 100000 |
| 250 | 250000 |
| 500 | 500000 |
| 1000 | 1000000 |
| 2500 | 2500000 |
| 5000 | 5000000 |
| 10000 | 10000000 |
Common mistakes to avoid
- •Converting in the wrong direction — multiplying when you should divide (or vice versa). Sanity-check whether GB should come out larger or smaller than TB.
- •Rounding too early. Keep full precision during the calculation and round only the final GB value.
- •Mixing bits and bytes — 1 byte = 8 bits, and storage is usually quoted in bytes while bandwidth is often in bits.
Common questions about data conversions
Is this data conversion exact?
Yes, using the SI (decimal) convention where 1 KB = 1,000 bytes. Some systems use the binary convention (1 KiB = 1,024 bytes), which gives slightly different numbers.
Why do my results differ from my operating system?
Because of decimal (1,000) versus binary (1,024) units — drive makers use decimal while operating systems often display binary. This page uses the decimal convention.
Are data units metric or imperial?
Neither — the real choice is decimal (KB, MB, GB) versus binary (KiB, MiB, GiB). We use the decimal SI convention here.
Can I round the answer?
Yes — file and storage sizes are routinely rounded to one or two decimals. Keep more precision when totalling many small files.
History of these units
History of the terabyte
digital information
The terabyte — one trillion bytes — arrived as consumer hard drives crossed the gigabyte ceiling in the 2000s. It now measures drives, backups and large media libraries.
History of the gigabyte
digital information
The gigabyte — one billion bytes — became the standard storage and memory unit as hard drives and RAM grew. Data plans and devices are commonly quoted in GB.
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Frequently asked questions
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