Convert data storage units: Gigabytes (GB) ↔ Terabytes (TB) — 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
TB = GB ÷ 1000 | GB = TB × 1000 (Results: 6 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: Gibibyte (GiB) 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 (GB/TB) | ≈ | Binary (GiB/TiB) | Application |
|---|---|---|---|
| 512 GB = 0.512000 TB | ≈ | 476.944 GiB = 0.465759 TiB | Mid-range SSD (OS reports ~477 GiB) |
| 1000 GB = 1.000000 TB | ≈ | 931.323 GiB = 0.909495 TiB | 1TB HDD (OS reports ~931 GiB) |
| 2000 GB = 2.000000 TB | ≈ | 1862.645 GiB = 1.819004 TiB | 2TB external drive (OS reports ~1.82 TiB) |
| 4000 GB = 4.000000 TB | ≈ | 3725.290 GiB = 3.637988 TiB | 4TB NAS storage (OS reports ~3.64 TiB) |
| 1024 GB = 1.024000 TB | ≈ | 1024 GiB = 1.000000 TiB | Binary-equivalent 1TiB storage |
The storage discrepancy comes from conflicting standards:
About GB/TB 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 GB = 1,000,000,000 bytes ÷ 1,073,741,824 bytes/GiB ≈ 0.931323 GiB
1 Binary GiB = 1,073,741,824 bytes ÷ 1,000,000,000 bytes/GB ≈ 1.073742 GB
Example: 2000 GB (decimal) × 0.931323 = 1862.646 GiB (binary)
This converter simplifies cross-standard conversions: switch to binary mode, enter the decimal GB value, and it will automatically calculate the binary GiB/TiB equivalent (and vice versa).
Data Storage Converter | Convert GB, MB, KB, TB, Bytes Online Free
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