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TB
Datatechnology

What is a terabyte?

Large drive and NAS unit — 1 trillion bytes (SI)

Definition

The terabyte equals 10¹² bytes (SI) or 2⁴⁰ bytes (binary, TiB). Used for large drives, NAS units, and big-data contexts. A 1 TB drive holds around 250,000 photos or 500 hours of HD video.

Common uses

  • Desktop HDDs and SSDs
  • Home NAS storage
  • Cloud-storage tiers

🌍 Real-world scale

Desktop HDD: 1–20 TB. Typical NAS: 4–48 TB. Cloud-storage plans: often 1–2 TB.

Convert from terabytes

7 conversions
Terabyte to Bit1 TB = 8,000,000,000,000 bTerabyte to Byte1 TB = 1,000,000,000,000 BTerabyte to Kilobyte1 TB = 1,000,000,000 KBTerabyte to Megabyte1 TB = 1,000,000 MBTerabyte to Gigabyte1 TB = 1,000 GBTerabyte to Petabyte1 TB = 0.001 PBTerabyte to Megabit per Second1 TB = 8,000,000 Mbps

Convert to terabytes

7 conversions
Bit to Terabyte1 b = 1.2500e-13 TBByte to Terabyte1 B = 1.0000e-12 TBKilobyte to Terabyte1 KB = 1.0000e-9 TBMegabyte to Terabyte1 MB = 1.0000e-6 TBGigabyte to Terabyte1 GB = 0.001 TBPetabyte to Terabyte1 PB = 1,000 TBMegabit per Second to Terabyte1 Mbps = 1.2500e-7 TB

Tips

  • 1 TB = 1000 GB (SI). 1 TiB = 1024 GiB.
  • TB drives formatted show less in OS (binary vs SI).
  • Archival/backup workflows typically measured in TB.

Common mistakes

  • Expecting a 1 TB drive to hold 1 TiB — actually 931 GiB formatted.
  • Buying a TB drive for backup without considering RAID overhead.
  • Confusing TB with Tb (terabit, 1/8).

FAQ about the terabyte

What is a terabyte?
The terabyte equals 10¹² bytes (SI) or 2⁴⁰ bytes (binary, TiB). Used for large drives, NAS units, and big-data contexts. A 1 TB drive holds around 250,000 photos or 500 hours of HD video.
Where is the terabyte used?
The terabyte is commonly used for: Desktop HDDs and SSDs; Home NAS storage; Cloud-storage tiers.
What is an example of a terabyte in real life?
Desktop HDD: 1–20 TB. Typical NAS: 4–48 TB. Cloud-storage plans: often 1–2 TB.
What category does the terabyte belong to?
The terabyte is a unit of data, part of the 8-unit data category on UnitConv.
How accurate are terabyte conversions?
All conversion factors follow NIST and BIPM international standards to 8 significant figures — the highest practical accuracy.
Explore all 8 data units and their conversions.💾 Data hub →