Convert Bits to Terabytes - Data Storage Converter
This converter translates a value in bits into terabytes (TB) using the SI decimal definition where 1 TB = 10^12 bytes. It is designed for large-scale capacity planning, data-transfer estimation, and reporting.
Governance
Record 9a468925e5d3 • Reviewed by Fidamen Standards Committee
Interactive Converter
Convert between bit and terabyte with precision rounding.
Quick reference table
| Bit | Terabyte |
|---|---|
| BIT 1 b | 0 TB |
| BIT 5 b | 0 TB |
| BIT 10 b | 0 TB |
| BIT 25 b | 0 TB |
| BIT 50 b | 0 TB |
| BIT 100 b | 0 TB |
Methodology
Base identity: 1 byte = 8 bits. Decimal prefixes: 1 TB = 1,000,000,000,000 bytes.
Conversion path: bits → bytes (÷8) → terabytes (÷10^12). Combined: TB = bits ÷ (8 × 10^12).
Binary option: for tebibytes (TiB), use 1 TiB = 1,099,511,627,776 bytes (2^40). The bit-to-byte step remains ÷8; only the divisor changes.
Key takeaways
TB = bits ÷ (8 × 10^12) for decimal terabytes; use the TiB divisor if you need binary units.
Worked examples
8,000,000,000,000 bits → 1 TB.
40,000,000,000,000 bits → 5 TB.
8,796,093,022,208 bits → 1 TiB (binary reference), which equals about 1.0995 TB under decimal prefixes.
F.A.Q.
Which convention does this converter follow by default?
The default is decimal SI: 1 TB = 10^12 bytes. Use the TiB divisor for binary contexts.
Why does an OS show a different value for the same drive size?
Many operating systems use binary units (TiB) while vendors use decimal (TB). The byte count is the same; the displayed number changes because of the divisor (10^12 vs 2^40).
How should I round for reports?
For summaries, 2–3 significant digits are common. For technical or contractual documents, keep more precision and state the unit and convention used.
Sources & citations
- NIST — SI prefixes and unit definitions — https://physics.nist.gov/cuu/Units/prefixes.html
- NIST — Binary prefixes (IEC) reference — https://physics.nist.gov/cuu/Units/binary.html
- ISO/IEC quantities and units overview — https://www.iso.org/standard/43348.html
- IEC 80000-13:2008 — Information science and technology — https://www.iso.org/standard/31898.html
- NIST SP 811 — Guide for the Use of the International System of Units — https://www.nist.gov/pml/special-publication-811
Further resources
Versioning & Change Control
Audit record (versions, QA runs, reviewer sign-off, and evidence).
Record ID: 9a468925e5d3What changed (latest)
v1.0.0 • 2025-11-12 • MINOR
Initial publication and governance baseline.
Why: Published with reviewed formulas, unit definitions, and UX controls.
Public QA status
PASS — golden 25 + edge 120
Last run: 2026-01-23 • Run: golden-edge-2026-01-23
Versioning & Change Control
Audit record (versions, QA runs, reviewer sign-off, and evidence).
What changed (latest)
v1.0.0 • 2025-11-12 • MINOR
Initial publication and governance baseline.
Why: Published with reviewed formulas, unit definitions, and UX controls.
Public QA status
PASS — golden 25 + edge 120
Last run: 2026-01-23 • Run: golden-edge-2026-01-23
Engine
v1.0.0
Data
Baseline (no external datasets)
Content
v1.0.0
UI
v1.0.0
Governance
Last updated: Nov 12, 2025
Reviewed by: Fidamen Standards Committee (Review board)
Credentials: Internal QA
Risk level: low
Reviewer profile (entity)
Fidamen Standards Committee
Review board
Internal QA
Entity ID: https://fidamen.com/reviewers/fidamen-standards-committee#person
Semantic versioning
- MAJOR: Calculation outputs can change for the same inputs (formula, rounding policy, assumptions).
- MINOR: New features or fields that do not change existing outputs for the same inputs.
- PATCH: Bug fixes, copy edits, or accessibility changes that do not change intended outputs except for previously incorrect cases.
Review protocol
- Verify formulas and unit definitions against primary standards or datasets.
- Run golden-case regression suite and edge-case suite.
- Record reviewer sign-off with credentials and scope.
- Document assumptions, limitations, and jurisdiction applicability.
Assumptions & limitations
- Uses exact unit definitions from the Fidamen conversion library.
- Internal calculations use double precision; display rounding follows the unit's configured decimal places.
- Not a substitute for calibrated instruments in regulated contexts.
- Jurisdiction-specific rules may require official guidance.
Change log
v1.0.0 • 2025-11-12 • MINOR
Initial publication and governance baseline.
Why: Published with reviewed formulas, unit definitions, and UX controls.
Areas: engine, content, ui • Reviewer: Fidamen Standards Committee • Entry ID: fb56b9fccf33