TiB (Tebibyte) is binary: 1 TiB = 2⁴⁰ bytes = 1,099,511,627,776 bytes
TB (Terabyte) is decimal: 1 TB = 10¹² bytes = 1,000,000,000,000 bytes
📊 Understanding TiB vs TB
Tebibyte (TiB): A binary unit of digital storage. 1 TiB = 2⁴⁰ bytes = 1,099,511,627,776 bytes. Used by operating systems (Windows, macOS, Linux) to report storage capacity.
Terabyte (TB): A decimal (SI) unit. 1 TB = 10¹² bytes = 1,000,000,000,000 bytes. Used by storage manufacturers (hard drives, SSDs, cloud providers).
Conversion formula: TB = TiB × 1.099511627776
🔍 Why the Difference Matters
- When you buy a "1 TB" hard drive, manufacturers advertise 1,000,000,000,000 bytes (decimal TB)
- Your computer reports capacity in TiB (binary), so it shows ~0.909 TiB for a 1 TB drive
- This explains the "missing" storage space confusion
📈 Real-World Examples
- 1 TiB SSD = 1.0995 TB advertised capacity
- 10 TiB NAS drive = 10.995 TB (decimal)
- 2 TiB external drive shows as 2.199 TB in decimal terms
- Windows reports 1 TB drive as 931 GiB (Gibibytes) ≈ 0.909 TiB
⚙️ Quick Conversion Table
| Tebibytes (TiB) | Terabytes (TB) | Bytes |
|---|---|---|
| 1 TiB | 1.099511627776 TB | 1.0995 × 10¹² bytes |
| 2 TiB | 2.199023255552 TB | 2.1990 × 10¹² bytes |
| 5 TiB | 5.49755813888 TB | 5.4976 × 10¹² bytes |
| 10 TiB | 10.99511627776 TB | 1.0995 × 10¹³ bytes |
| 20 TiB | 21.99023255552 TB | 2.1990 × 10¹³ bytes |
| 50 TiB | 54.9755813888 TB | 5.4976 × 10¹³ bytes |
| 100 TiB | 109.9511627776 TB | 1.0995 × 10¹⁴ bytes |
❓ Frequently Asked Questions
Q: How many TB in 1 TiB?
A: 1 TiB = 1.099511627776 TB (approximately 1.1 TB).
Q: Why does Windows show less space than advertised?
A: Windows uses binary units (TiB/GiB) but labels them as TB/GB. A 1 TB drive (decimal) is actually 0.909 TiB, showing as "931 GB" in Windows.
Q: Which is larger, TiB or TB?
A: 1 TiB is about 9.95% larger than 1 TB (1,099,511,627,776 vs 1,000,000,000,000 bytes).
Q: When should I use TiB vs TB?
A: Use TB for marketing/storage specs. Use TiB for precise binary calculations and OS reporting.
📚 Storage Unit Hierarchy
- 1 KiB (Kibibyte) = 1,024 bytes
- 1 MiB (Mebibyte) = 1,024 KiB = 1,048,576 bytes
- 1 GiB (Gibibyte) = 1,024 MiB = 1,073,741,824 bytes
- 1 TiB (Tebibyte) = 1,024 GiB = 1,099,511,627,776 bytes
- 1 PiB (Pebibyte) = 1,024 TiB ≈ 1.1259 PB