GB to TB Converter — Gigabytes to Terabytes
A GB to TB converter divides gigabytes into terabytes — the direction you use when adding up lots of files, quotas or camera archives to judge how many drives to buy.
Quick answer: Divide by 1,000 for decimal TB (1,000 GB = 1 TB) or by 1,024 for binary TiB (1,024 GiB = 1 TiB). 1,600 GB of footage is 1.6 TB decimal — the same data shows as about 1.46 TiB on a 2 TB drive.
The two lines are the same file — only the definition of “GB” differs. This 2.4% gap per step is why a 1 TB drive shows 931 GiB in Windows.
| GB | TB |
|---|---|
| 0.5 | 0.000488281 |
| 1 | 0.000976563 |
| 2 | 0.00195313 |
| 5 | 0.00488281 |
| 10 | 0.00976563 |
| 50 | 0.0488281 |
| 100 | 0.0976563 |
| 500 | 0.488281 |
| 1,000 | 0.976563 |
| Decimal | 1,000 GB = 1 TB |
|---|---|
| Binary | 1,024 GiB = 1 TiB |
| 1 TB decimal in binary | 0.9095 TiB (about 931 GiB) |
| Planning rule | Add 7% headroom when converting decimal TB into binary GiB |
Add up your data before buying drives
Sum the real sizes of your photo library, video projects and backups in GB, then convert: 900 GB of photos plus 400 GB of video plus 300 GB of backups is 1,600 GB, or 1.6 TB decimal — which is 1.46 TiB on a 2 TB drive, leaving room for growth. Working in decimal for the purchase decision and converting once at the end avoids the repeated 2.4% errors that trip up per-folder estimates.
Cloud quotas behave the same way
A 2 TB cloud plan is 2,000 GB decimal; the desktop sync client will show it as 1.81 TiB and may report “out of space” when your local folder reaches that size. If you are within 5% of a quota, sync in decimal GB terms — that is what the provider bills against.
When to use this calculator
- Deciding whether your archive fits a 2 TB or 4 TB drive.
- Converting a folder total to judge a cloud plan upgrade.
- Translating a backup job's GB total into the TB on the drive label.
- Chaining conversions: GB → TB → drive labels for a purchase list.