Gigabytes to Terabytes Converter
Convert GB to TB instantly. 1 TB = 1,000 GB (decimal) or 1,024 GB (binary). Understand hard drive capacity, cloud storage plans, and data transfer needs with accurate GB to TB conversion.
Why Use Gigabytes to Terabytes Converter
As storage needs grow, understanding the relationship between gigabytes and terabytes is increasingly important. Whether you're comparing hard drives, choosing a cloud storage plan, estimating backup storage requirements, or planning a large media library, converting GB to TB — and understanding the decimal vs. binary difference — helps you make informed decisions and avoid running out of space.
- Hard drive shopping: Compare drive capacities by converting GB values to TB
- Cloud storage: Understand how your GB usage fits in a TB-based plan
- Video production: Estimate TB storage requirements for raw 4K or 8K footage
- Backup planning: Calculate how many TB you need to back up your GB data
- Data center capacity: Convert GB server allocations to TB for planning
Quick Reference: Common Conversions
- 100 GB = 0.1 TB (decimal)
- 500 GB = 0.5 TB (decimal)
- 1,000 GB = 1 TB (decimal)
- 1,024 GB ≈ 1 TiB (binary)
- 2,000 GB = 2 TB (decimal)
- 2,048 GB = 2 TiB (binary)
- 4,000 GB = 4 TB (decimal, common NAS drive)
- 20,000 GB = 20 TB (high-capacity hard drive)
The Formula
Two standards apply:
Decimal (SI): TB = GB ÷ 1,000 — used by hard drive manufacturers and cloud storage providers.
Binary (IEC): TiB = GiB ÷ 1,024 — used by operating systems when reporting actual drive and file sizes.
Practical implication: a "4 TB" hard drive marketed in decimal = 4,000 GB. Your OS reports it as approximately 3.64 TiB (3,637 GiB) in binary. The ~9% difference between decimal and binary definitions means a 1 TB drive always shows as slightly less than 1 TB on your computer.
Real-World Examples
- Photo library: A 500 GB photo library from 10 years of shooting equals 0.5 TB — fits on one 1 TB drive with room to spare.
- 4K video: One hour of 4K video at high quality uses about 50–100 GB. A 2 TB drive holds 20–40 hours of raw 4K footage.
- Music collection: 100,000 MP3 tracks at ~10 MB each = 1,000 GB = 1 TB.
- Gaming: Modern game libraries easily exceed 500 GB. An 8 TB NAS drive can hold over 100 large modern games.
- Cloud backup: iCloud and Google One sell plans in GB (200 GB, 2 TB). Their 2 TB plan = 2,000 GB of cloud storage.
Frequently Asked Questions
How many GB is 1 TB?
In the decimal (SI) system used by storage manufacturers: 1 TB = 1,000 GB. In the binary (IEC) system used by operating systems: 1 TiB = 1,024 GiB. When a hard drive is marketed as "1 TB," that means 1,000,000,000,000 bytes. When your OS reports storage capacity, it may show this as approximately 931 GB (since 931 GiB × 1,024³ ≈ 1,000,000,000,000 bytes). This difference is not missing storage — it's just the two definitions of "GB" giving different numbers for the same amount of space.
Is 1 TB equal to 1000 GB or 1024 GB?
Formally: 1 TB (terabyte, SI decimal) = 1,000 GB exactly, while 1 TiB (tebibyte, IEC binary) = 1,024 GiB. In practice, the word "TB" is colloquially used for both. Hard drive manufacturers always use the decimal definition to maximize the number shown on the box. Operating systems (Windows, macOS, Linux) use the binary definition when displaying file and drive sizes. To avoid confusion: when reading a drive's marketed capacity, assume decimal (1,000 GB); when reading OS disk usage, assume binary (1,024 GiB).
How many GB is 2 TB?
2 TB (decimal) = 2,000 GB. 2 TiB (binary) = 2,048 GiB. A 2 TB hard drive is a popular capacity for laptops and desktop systems. At 2,000 GB of usable space (per manufacturer), it can store roughly: 500,000 photos at 4 MB each, 2,000 hours of HD video at 1 GB/hour, or a collection of 200 large (10 GB) video games. In cloud storage, Apple's iCloud 2 TB plan and Google One's 2 TB plan both offer 2,000 GB of storage.
How long would it take to fill a 1 TB drive?
It depends entirely on how you use it: Casual home use (documents, photos, some music) — a 1 TB drive might last 5–10 years. Photography enthusiast shooting RAW files (25–50 MB each) — filling up 1 TB takes 20,000–40,000 photos, possibly 1–2 years of heavy shooting. Video creator working in 4K — 1 TB fills in roughly 10–20 hours of raw footage. Gamer installing modern games (50–100 GB each) — 1 TB fills with 10–20 titles. A 1 TB drive is a practical minimum for most users; serious creators should consider 2–4 TB or more.