Convert data storage units: Terabytes (TB) ↔ Gigabytes (GB) — supports decimal (1000x) and binary (1024x) standards.
Select conversion standard (critical for storage accuracy):
Select conversion direction:
Decimal Standard (Storage Devices/SI):
1 TB = 1000 GB | 1 GB = 0.001 TB
GB = TB × 1000 | TB = GB ÷ 1000 (Results: 3 decimal places)
*Binary note: 1 TiB (Tebibyte) = 1024 GiB (Gibibyte) — use standard toggle for precise OS/software calculations
Decimal: Used for hard drives/SSDs (manufacturer labeling); Binary: Tebibyte (TiB) for OS storage readouts
Display format:
Quick conversions (common storage sizes) - click to auto-fill:
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Understanding data storage units and the critical difference between decimal and binary standards.
| Standard | Units (Large → Small) | Conversion Factor | Common Uses |
|---|---|---|---|
| Decimal (SI) | TB → GB → MB → KB → B | ×1000 (1 TB = 1000 GB) | Hard drives (HDD), SSDs, USB drives (manufacturer labeling), data transfer rates |
| Binary (IEC) | TiB → GiB → MiB → KiB → B | ×1024 (1 TiB = 1024 GiB) | Operating systems (Windows/macOS), software, file storage readouts, RAM capacity |
| Decimal (TB/GB) | ≈ | Binary (TiB/GiB) | Application |
|---|---|---|---|
| 0.5 TB = 500.000 GB | ≈ | 0.4547 TiB = 465.759 GiB | 500GB SSD (OS reports ~466 GiB) |
| 1 TB = 1000.000 GB | ≈ | 0.9095 TiB = 931.323 GiB | 1TB HDD (OS reports ~931 GiB) |
| 2 TB = 2000.000 GB | ≈ | 1.8190 TiB = 1862.645 GiB | 2TB external drive (OS reports ~1.82 TiB) |
| 4 TB = 4000.000 GB | ≈ | 3.6380 TiB = 3725.290 GiB | 4TB NAS storage (OS reports ~3.64 TiB) |
| 1.024 TB = 1024.000 GB | ≈ | 1.0000 TiB = 1024.000 GiB | Binary-equivalent 1TiB storage |
The storage discrepancy comes from conflicting standards:
About TB/GB conversions and storage unit standards
The two standards evolved for different purposes:
Decimal: 1 GB = 1,000,000,000 bytes | 1 TB = 1,000 GB
Binary: 1 GiB = 1,073,741,824 bytes | 1 TiB = 1024 GiB
Choose the standard based on your use case:
Use these cross-standard conversion factors:
1 Decimal TB = 1,000,000,000,000 bytes ÷ 1,099,511,627,776 bytes/TiB ≈ 0.9095 TiB
1 Binary TiB = 1,099,511,627,776 bytes ÷ 1,000,000,000,000 bytes/TB ≈ 1.0995 TB
Example: 2 Decimal TB × 0.9095 = 1.8190 TiB (binary)
This converter simplifies cross-standard conversions: switch to binary mode, enter the decimal TB value, and it will automatically calculate the binary TiB/GiB equivalent (and vice versa).
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