GB to TB
Need to convert gigabytes to terabytes? Divide by 1024. Here is the formula and a reference chart for common data storage conversions.
Formula
TB = GB ÷ 1024 GB = TB × 1024 MB = GB × 1024
Quick reference chart
| From | To |
|---|---|
| 100 GB | 0.098 TB |
| 256 GB | 0.25 TB |
| 500 GB | 0.488 TB |
| 512 GB | 0.5 TB |
| 1000 GB | 0.977 TB |
| 1024 GB | 1 TB |
| 2048 GB | 2 TB |
| 4096 GB | 4 TB |
| 8192 GB | 8 TB |
| 1 TB | 1024 GB |
| 2 TB | 2048 GB |
| 4 TB | 4096 GB |
When GB to TB matters
The most common reason to convert GB to TB is comparing storage device sizes or calculating how much a collection of files actually occupies. A folder of 4K video files showing 850 GB, for example, is 0.83 TB — just under a 1 TB drive. Knowing whether something fits is the practical question this conversion answers.
Cloud storage plans are often quoted in TB at the higher tiers. Google One offers 2 TB for a monthly fee. iCloud plans step from 200 GB to 2 TB. When your photo library shows 180,000 photos at an average of 5 MB each, that is 900 GB — just under 1 TB. Knowing the conversion helps you choose the right plan without over-buying.
For developers and IT professionals, disk space calculations come up constantly. A production database backup of 400 GB is 0.39 TB. A server with 8 TB of storage holds 8,192 GB. S3 storage costs are quoted per GB, so converting your total TB to GB for billing estimates is a routine task. The binary conversion (1 TB = 1,024 GB) is what operating systems use, though some cloud providers bill in decimal (1 TB = 1,000 GB) — always check which definition your provider uses.
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Open Data Storage Converter →Frequently asked questions
How many GB is 1 TB?
1 terabyte equals 1024 gigabytes in binary (used by operating systems). Storage manufacturers often use 1 TB = 1000 GB (decimal), which is why a 1 TB hard drive shows as ~931 GB in Windows or macOS.
Is 1 TB enough storage?
1 TB holds approximately 250,000 photos (at 4 MB each), 500 hours of HD video, or 250 hours of 4K video. For most home users, 1 TB is ample. Professionals working with video, photos or VMs often need 4 TB or more.
How many GB is 2 TB?
2 TB equals 2048 GB (binary calculation: 2 × 1024 = 2048 GB).
Why does a 1 TB drive show less than 1 TB?
Drive manufacturers use decimal: 1 TB = 1,000,000,000,000 bytes. Operating systems use binary: 1 TB = 1,099,511,627,776 bytes. A manufacturer's 1 TB = 1,000,000,000,000 ÷ 1,099,511,627,776 = 0.909 TiB, which shows as about 931 GB in Windows or macOS.
What comes after terabytes?
After terabytes (TB) come petabytes (PB = 1024 TB), then exabytes (EB = 1024 PB), zettabytes (ZB), and yottabytes (YB). The global internet traffic per year is measured in exabytes.
How many photos fit in 1 TB?
Approximately 250,000 smartphone photos at 4 MB each, or 125,000 high-quality DSLR photos at 8 MB each. RAW files from professional cameras (20–50 MB each) reduce this to 20,000–50,000 images per TB.