ISO 1000-1992 PDF

Full title and description

ISO 1000:1992 — SI units and recommendations for the use of their multiples and of certain other units. This international standard sets out the International System of Units (SI), the accepted unit names and symbols, commonly used multiples and submultiples (prefixes), and recommendations for the presentation and use of unit symbols in technical and scientific documents. The PDF edition presents the full normative text for reference and implementation.

Abstract

ISO 1000:1992 provides authoritative definitions, names and symbols for SI base and derived units, recommended multiples (prefixes), and guidance on the correct use and layout of unit symbols. It is intended to promote clarity and uniformity in the expression of quantities across engineering, science, commerce and education. The 1992 edition consolidates internationally agreed conventions for unit symbols and their practical presentation in printed and electronic documents.

General information

• Status: Superseded by later international publications; consult ISO for current, active replacements and the precise withdrawal status.
• Publication date: 1992 (ISO 1000:1992).
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: Units of measurement / metrology (ICS category: units and weights & measures).
• Edition / version: First edition, 1992.
• Number of pages: Approximately 10–20 pages (typical for ISO unit-definition standards of this type).

Scope

Specifies the International System of Units (SI) as used internationally, including the names and symbols of base and derived units, conventions for prefixes (multiples and submultiples), and rules for writing and formatting unit symbols and values in technical text. The scope is limited to presentation, naming and symbol conventions rather than measurement methods or calibrations.

Key topics and requirements

• Definitions and names of SI base units (e.g., metre, kilogram, second, ampere, kelvin, mole, candela).
• Common derived units and accepted additional units (where applicable).
• Standard prefixes for multiples and submultiples (e.g., kilo-, milli-, micro-, mega-), their symbols and decimal factors.
• Rules for use and formatting of unit symbols (spacing, capitalization, plural forms, compound units, use of solidus and negative powers).
• Recommendations for combination of unit symbols with numerical values, uncertainty notation, and presentation in tables and equations.

Typical use and users

Used by standards professionals, technical editors, document authors, educators, engineers, scientists and regulatory bodies to ensure consistent expression of quantities and units in technical reports, specifications, drawings and publications. Also consulted by software developers and database designers working with measurement data to enforce consistent unit symbol usage.

Related standards

Closely related to and subsequently harmonized with other ISO publications on quantities and units (for example the ISO 31 series) and later consolidated work in the ISO/IEC 80000 series. Also related to national and international guidance such as the BIPM SI Brochure and regional standards and industry-specific measurement guidelines.

Keywords

SI, International System of Units, unit names, unit symbols, prefixes, multiples, measurement units, unit notation, ISO 1000:1992

FAQ

Q: What is this standard?

A: ISO 1000:1992 is an international standard that defines the International System of Units (SI) names, symbols, and recommended conventions for the use of multiples and unit presentation in technical documents.

Q: What does it cover?

A: It covers SI base and common derived units, prefixes for multiples and submultiples, and practical rules for writing unit symbols and combining them with numerical values (spacing, capitalization, compound units, etc.). It does not provide measurement procedures or calibration methods.

Q: Who typically uses it?

A: Technical authors, standards writers, engineers, scientists, educators, editors and organizations that need consistent, internationally accepted ways to express units and quantities in documentation, specifications and data systems.

Q: Is it current or superseded?

A: The 1992 edition is historic; its content has since been reflected and updated in later ISO publications (for example the ISO 31 family and the ISO/IEC 80000 series) and in the SI Brochure from BIPM. Users should check with ISO or national standards bodies for the current active standard covering units and symbols.

Q: Is it part of a series?

A: Yes. ISO 1000 relates to the broader body of ISO work on quantities and units (historically ISO 31) and to the later ISO/IEC 80000 series which provides a modern, structured set of standards on quantities, units and their usage.

Q: What are the key keywords?

A: SI, units, symbols, prefixes, multiples, measurement, ISO 1000, quantities and units.