GB to TB Converter
Convert Gigabytes (GB) to Terabytes (TB) with real-time bidirectional calculation, decimal vs. binary toggles, and conversion tables.
Calculation: 1,024 GB ÷ 1,024 = 1 TB
Why Does a 1 TB Hard Drive Only Show 931 GB in Windows?
If you recently plugged in a brand new 1 TB external SSD or internal hard drive and noticed Windows reports only approximately 931 GB (or GiB) of available space, your drive is not defective and you have not been cheated out of storage.
This universal discrepancy happens because hardware manufacturers and computer operating systems measure data capacity using two conflicting numeric systems:
Decimal Standard (SI)
Used by storage drive manufacturers (Western Digital, Samsung, Seagate, Apple):
1 TB = 1,000,000,000,000 Bytes
Based on powers of 10 (10¹²).
Binary Standard (IEC)
Used by Microsoft Windows, file explorers, and RAM architecture:
1 TiB = 1,099,511,627,776 Bytes
Based on powers of 2 (2⁴⁰ = 1024⁴).
When Windows inspects 1,000,000,000,000 bytes, it divides by 1,024 three times (1,024 × 1,024 × 1,024 = 1,073,741,824 bytes per GB), yielding exactly 931.32 GB. National Institute of Standards and Technology (NIST).
Advertised Storage vs. Actual Windows Capacity
Comparison of box capacity (Decimal GB) versus real usable file space recognized by Windows (Binary GiB):
What Fits on a 1 TB (1,024 GB) Drive?
A single Terabyte is a massive amount of digital space for everyday consumers. Here is an approximate breakdown of what 1 TB can hold:
Need to calculate how long downloading 1 TB of files will take on your internet plan? Use our Download Time Calculator or inspect our MB to GB Converter.
Conversion Table
| Gigabytes (GB) | Terabytes (TB) |
|---|---|
| 1 GB | 0.000977 TB |
| 100 GB | 0.0977 TB |
| 500 GB | 0.488 TB |
| 1,024 GB | 1 TB |
| 2,000 GB | 1.95 TB |
| 4,096 GB | 4 TB |
| 8,192 GB | 8 TB |
| 16,384 GB | 16 TB |
Frequently Asked Questions
How many GB in a TB?
There are 1,024 Gigabytes (GB) in one Terabyte (TB) in binary computing (used by operating systems like Windows). In decimal marketing numbers used by hard drive makers, 1 TB is defined as 1,000 GB.
Is 1,000 GB equal to 1 TB?
In marketing terms, hard drive manufacturers state 1 TB = 1,000 GB. But in computing, 1 TB = 1,024 GB. This is why a 1 TB drive shows as approximately 931 GB in Windows.
How do I convert GB to TB?
Divide your GB value by 1,024 for binary computing (OS standard). For example, 2,048 GB ÷ 1,024 = 2 TB. Alternatively, divide by 1,000 for manufacturer drive capacities.
What is 1000 GB equal to?
1,000 GB equals approximately 0.977 TB in binary computing (1,000 ÷ 1,024). In decimal terms used by storage manufacturers, 1,000 GB equals exactly 1 TB.