EN ISO 80000-4:2019/A1:2025

Quantities and units - Part 4: Mechanics - Amendment 1 (ISO 80000-4:2019/Amd 1:2025)

Größen und Einheiten - Teil 4: Mechanik - Änderung 1 (ISO 80000-4:2019/Amd 1:2025)

Grandeurs et unités - Partie 4: Mécanique - Amendement 1 (ISO 80000-4:2019/Amd 1:2025)

Veličine in enote - 4. del: Mehanika - Dopolnilo 1 (ISO 80000-4:2019/Amd 1:2025)

General Information

• Status: Published
• Publication Date: 05-Aug-2025
• ICS: 01.060 - Quantities and units
• Technical Committee: CEN/SS F02 - Units and symbols
• Current Stage: 6060 - Definitive text made available (DAV) - Publishing
• Start Date: 06-Aug-2025
• Completion Date: 06-Aug-2025
• Ref Project: SIST EN ISO 80000-4:2019/A1:2025 - Quantities and units - Part 4: Mechanics - Amendment 1 (ISO 80000-4:2019/Amd 1:2025)

Relations

• Amends: EN ISO 80000-4:2019 - Quantities and units - Part 4: Mechanics (ISO 80000-4:2019)
• Effective Date: 07-Jun-2023

Overview

EN ISO 80000-4:2019/A1:2025 is an amendment to Part 4 of the ISO 80000 series, which defines quantities and units for mechanics. Published and adopted by CEN in 2025, this amendment updates normative references and clarifies how names, symbols, definitions and units for mechanical quantities are specified with reference to the International System of Units (SI).

Key topics and requirements

• Reference to SI (BIPM): The amendment explicitly refers to the International System of Units (SI), 9th edition (2019) published by BIPM as a normative reference. This anchors mechanical quantities to the current SI definitions and rules.
• Clarified clause on terms and definitions: Clause 3 is revised so that names, symbols, definitions and units for quantities used in mechanics are given in Table 1 and in the SI. This strengthens the link between the standard’s tabulated quantities and SI conventions.
• Formal adoption and status: The document is an official CEN amendment (approved by CEN) and is to be implemented as a national standard by CEN members, ensuring harmonized use across participating countries.
• Scope alignment: The amendment supplements EN ISO 80000-4:2019 without modifying the core standard’s content, providing targeted editorial and normative updates.

Applications and users

This amendment supports consistent use of units, symbols and definitions in any context where mechanics quantities are recorded, exchanged or interpreted:

• Engineers and designers ensuring consistent unit usage across calculations, drawings and specifications.
• Metrologists and calibration laboratories aligning measurements with SI definitions and international practice.
• Standards developers and technical committees harmonizing cross‑discipline documents that reference mechanical quantities.
• Software developers and simulation tool vendors implementing unit-aware systems, libraries or CAD/CAE models.
• Educators and technical authors producing textbooks, guides and documentation that must follow standardized terminology.

Benefits

• Improves interoperability of technical data and documentation across industries and borders.
• Reduces ambiguity in units and symbols used in mechanics by explicitly tying them to the SI.
• Facilitates regulatory and procurement compliance where standardized measurement terminology is required.

Related standards

• ISO 80000 series (other parts defining quantities and units for physics, electromagnetism, thermodynamics, etc.)
• BIPM - The International System of Units (SI), 9th edition (2019)

For implementers, consult your national standards body for the official text, implementation timeline and any national endorsements of EN ISO 80000-4:2019/A1:2025.

Standards Content (Sample)

SLOVENSKI STANDARD
01-november-2025
Veličine in enote - 4. del: Mehanika - Dopolnilo 1 (ISO 80000-4:2019/Amd 1:2025)
Quantities and units - Part 4: Mechanics - Amendment 1 (ISO 80000-4:2019/Amd
1:2025)
Größen und Einheiten - Teil 4: Mechanik - Änderung 1 (ISO 80000-4:2019/Amd 1:2025)
Grandeurs et unités - Partie 4: Mécanique - Amendement 1 (ISO 80000-4:2019/Amd
1:2025)
Ta slovenski standard je istoveten z: EN ISO 80000-4:2019/A1:2025
ICS:
01.060 Veličine in enote Quantities and units
17.020 Meroslovje in merjenje na Metrology and measurement
splošno in general
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN ISO 80000-4:2019/A1
EUROPEAN STANDARD
NORME EUROPÉENNE
August 2025
EUROPÄISCHE NORM
ICS 01.060
English Version
Quantities and units - Part 4: Mechanics - Amendment 1
(ISO 80000-4:2019/Amd 1:2025)
Grandeurs et unités - Partie 4: Mécanique - Größen und Einheiten - Teil 4: Mechanik - Änderung 1
Amendement 1 (ISO 80000-4:2019/Amd 1:2025) (ISO 80000-4:2019/Amd 1:2025)
This amendment A1 modifies the European Standard EN ISO 80000-4:2019; it was approved by CEN on 5 December 2024.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for inclusion of
this amendment into the relevant national standard without any alteration. Up-to-date lists and bibliographical references
concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN
member.
This amendment exists in three official versions (English, French, German). A version in any other language made by translation
under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the
same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2025 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 80000-4:2019/A1:2025 E
worldwide for CEN national Members.

Contents Page
European foreword . 3

European foreword
This document (EN ISO 80000-4:2019/A1:2025) has been prepared by Technical Committee ISO/TC 12
"Quantities and units " in collaboration with CCMC.
This Amendment to the European Standard EN ISO 80000-4:2019 shall be given the status of a national
standard, either by publication of an identical text or by endorsement, at the latest by February 2026,
and conflicting national standards shall be withdrawn at the latest by February 2026.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
Any feedback and questions on this document should be directed to the users’ national standards
body/national committee. A complete listing of these bodies can be found on the CEN website.
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,
Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland,
Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of
North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and the
United Kingdom.
Endorsement notice
The text of ISO 80000-4:2019/Amd 1:2025 has been approved by CEN as EN ISO 80000-
4:2019/A1:2025 without any modification.

SIST EN ISO 80000-4:2019/A1:
...