Gigabytes to Terabytes Converter (GB to TB)
1 GB = 0.001 TB in decimal units, the way SSDs and hard drives are sold. Convert gigabytes to terabytes to size drives and backups, with charts.
Terabyte (TB) = Gigabyte (GB) × 0.001
Gigabyte (GB): A gigabyte is 1,000,000,000 bytes (10^9). A capacity of 500 decimal GB is about 465.66 GiB; the differing numbers describe the same number of bytes.
Terabyte (TB): A terabyte is 10^12 bytes, or 1,000 gigabytes. Hard drives and SSDs are sold in terabytes using this decimal definition.
| Gigabyte (GB) | Terabyte (TB) |
|---|---|
| 1 | 0.001 |
| 5 | 0.005 |
| 10 | 0.01 |
| 25 | 0.025 |
| 50 | 0.05 |
| 100 | 0.1 |
Drives are sold by the terabyte, but the things that fill them are measured in gigabytes: game installs, video projects, phone backups and photo libraries. Adding up those gigabytes and converting to terabytes shows what size of SSD, external drive or NAS a collection actually needs, with room left over. Video is usually the largest item: one hour of 4K footage recorded at 100 Mbps fills 45 GB.
Drive makers use decimal prefixes, so 1 TB is exactly 1,000 GB, or 10¹² bytes. A computer that reports space in binary units shows the same drive as about 931 GiB; when your totals come from such software, convert them to decimal gigabytes before comparing them with the size on a drive's box.
How to use this tool
- Type a value in the Gigabyte box to see it in terabytes, or type in the Terabyte box to convert the other way.
- Press ⇄ to swap the two units, or Load example for a typical value.
- Check the charts below for common values; for other units, open the Digital Storage converter.
Formula
Terabyte (TB) = Gigabyte (GB) × 0.001
Gigabyte (GB) = Terabyte (TB) × 1000
Both factors come from exact definitions: 1 terabyte = 1000 gigabytes and 1 gigabyte = 0.001 terabytes (shown to 12 significant digits).
Example
Two conversions worked with the same factors the converter uses:
825 GB × 0.001 = 0.825 TB
2 TB × 1000 = 2000 GB
Gigabyte to Terabyte chart
Common values from gigabytes to terabytes, rounded to four decimal places.
| Gigabyte (GB) | Terabyte (TB) |
|---|---|
| 32 | 0.032 |
| 64 | 0.064 |
| 100 | 0.1 |
| 128 | 0.128 |
| 200 | 0.2 |
| 256 | 0.256 |
| 320 | 0.32 |
| 500 | 0.5 |
| 512 | 0.512 |
| 640 | 0.64 |
| 750 | 0.75 |
| 825 | 0.825 |
| 960 | 0.96 |
| 1,000 | 1 |
| 1,500 | 1.5 |
| 2,000 | 2 |
| 2,500 | 2.5 |
| 3,000 | 3 |
| 4,000 | 4 |
| 5,000 | 5 |
| 6,000 | 6 |
| 8,000 | 8 |
| 10,000 | 10 |
| 16,000 | 16 |
Terabyte to Gigabyte chart
The reverse direction for values people often look up.
| Terabyte (TB) | Gigabyte (GB) |
|---|---|
| 0.12 | 120 |
| 0.24 | 240 |
| 0.48 | 480 |
| 0.96 | 960 |
| 1 | 1,000 |
| 1.92 | 1,920 |
| 2 | 2,000 |
| 3.84 | 3,840 |
| 4 | 4,000 |
| 12 | 12,000 |
| 18 | 18,000 |
| 20 | 20,000 |
Collections measured in gigabytes
| Item | Gigabyte (GB) | Terabyte (TB) |
|---|---|---|
| Nintendo Switch internal storage (original model) | 32 | 0.032 |
| 10,000 photos at about 5 MB each | 50 | 0.05 |
| Base storage on many current phones | 128 | 0.128 |
| PlayStation 5 internal SSD (original model) | 825 | 0.825 |
| Library of 400 HD movies at 5 GB each | 2,000 | 2 |
| A year of daily 10 GB backups, all kept | 3,650 | 3.65 |
Quick mental estimate
Divide by 1,000 by moving the decimal point three places left: 825 GB → 0.825 TB. The step is exact in decimal units, so there is nothing to estimate.
Use the converter or the charts when the exact figure matters.
The two units
Gigabyte (GB): A gigabyte is 1,000,000,000 bytes (10^9). A capacity of 500 decimal GB is about 465.66 GiB; the differing numbers describe the same number of bytes.
Terabyte (TB): A terabyte is 10^12 bytes, or 1,000 gigabytes. Hard drives and SSDs are sold in terabytes using this decimal definition.
Frequently asked questions
How many GB is 1 TB?
Exactly 1,000 GB in the decimal units drive makers use. A computer counting in binary units reports a 1 TB drive as about 931 GiB.
How many TB is 500 GB?
500 GB is 0.5 TB, half a terabyte. Drives sold as 512 GB hold 0.512 TB, slightly more.
Why do some SSDs come in 480 GB or 960 GB sizes?
Those drives set aside more of their flash memory as spare area for wear management, so less is offered to the user. 960 GB is 0.96 TB, while a 1 TB model with less spare area offers the full 1,000 GB.
How precise is the result?
The converter uses the exact definitions above with browser floating-point arithmetic and shows up to 12 significant digits. The charts round to four decimal places for reading.
Sources
Last updated:
Page address with these inputs: https://kakao.mobile/tools/gigabyte-to-terabyte-converter/
Cite or embed this tool
kakaoCalc. (2026, November 8). Gigabytes to Terabytes Converter (GB to TB). https://kakao.mobile/tools/gigabyte-to-terabyte-converter/
“Gigabytes to Terabytes Converter (GB to TB).” kakaoCalc, 8 Nov. 2026, kakao.mobile/tools/gigabyte-to-terabyte-converter/.
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