Fidamen

Convert AttoBytes to Bytes – Data Converter

This converter transforms values in attoBytes into bytes using the SI decimal prefix definition for atto (1 atto = 10^-18). It is intended for quick, precise translations of extremely small digital storage quantities for documentation, calculation checks, and data processing pipelines.

The tool highlights practical accuracy considerations and recommended notation so outputs remain unambiguous and compliant with international unit guidance. For very large datasets or contexts that require binary prefixes, consult the methodology and FAQ for guidance on selecting the correct prefix system.

Updated Nov 13, 2025QA PASS — golden 25 / edge 120Run golden-edge-2026-01-23

Governance

Record 4236307ca5ad • Reviewed by Fidamen Standards Committee

Interactive Converter

Convert between attobyte and byte with precision rounding.

Quick reference table

AttobyteByte
1 aB0 B
5 aB0 B
10 aB0 B
25 aB0 B
50 aB0 B
100 aB0 B

Methodology

The conversion is based on the International System of Units (SI) definition of decimal prefixes. The atto prefix denotes 10^-18, therefore 1 attoByte equals 10^-18 bytes. Use decimal-based arithmetic (powers of 10) for conversions between SI-prefixed data units.

When expressing results for technical documentation or automated systems, follow standards for unit notation and significant figures. Referenced standards and guidance include SI unit definitions, ISO/IEC standards for quantities and units in information science, and IEEE recommendations on prefix usage. For workplace handling or labeling policies, consult applicable regulatory guidance.

Worked examples

Example 1: Convert 5 attoBytes → bytes. Calculation: 5 × 1e-18 = 5e-18 bytes.

Example 2: Convert 2.5e3 attoBytes → bytes. Calculation: 2.5e3 × 1e-18 = 2.5e-15 bytes.

Example 3 (inverse): 1 byte → attoBytes. Calculation: 1 × 1e18 = 1e18 attoBytes.

F.A.Q.

Is attoByte a standard SI unit?

Atto is a standard SI prefix meaning 10^-18. Appending it to the unit 'byte' follows decimal (SI) prefix rules. Use this decimal system for conversions unless you explicitly need binary prefixes (kibi, mebi, etc.).

How precise are results and what about floating point limits?

The mathematical conversion factor is exact (1 atto = 10^-18). In practical computation, floating point representations may lose precision when mixing very large and very small magnitudes. For highest accuracy use arbitrary-precision arithmetic or decimal libraries when aggregating many values or converting near the limits of double precision.

When should I use binary prefixes instead of SI prefixes?

Use binary prefixes (kibi-, mebi-, gibi-) only when the quantity is defined in powers of two (e.g., in memory addressing or binary file sizes). For measurements and decimal-based quantities, use SI prefixes such as atto-, pico-, nano-.

Are there standards or best practices I should cite when documenting conversions?

Yes. Refer to SI documentation and the ISO/IEC standards for quantities and units in information science for formal notation, and IEEE guidance regarding prefix usage in computing contexts. Also consult your organization’s data governance policies for rounding and display rules.

Does this converter handle unit formatting and rounding?

This converter returns the mathematically converted value. For presentation and compliance, round according to your reporting rules or standards (for example, significant digits recommended by ISO guidance) and include unit labels explicitly to avoid ambiguity.

Sources & citations

Further resources

Versioning & Change Control

Audit record (versions, QA runs, reviewer sign-off, and evidence).

Record ID: 4236307ca5ad

What changed (latest)

v1.0.0 • 2025-11-13 • 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 13, 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 • 2025-11-13 • 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: acd314cff43e