EN ISO 80000-3:2020/A1:2025
(Amendment)Quantities and units - Part 3: Space and time - Amendment 1 (ISO 80000-3:2019/Amd 1:2025)
Quantities and units - Part 3: Space and time - Amendment 1 (ISO 80000-3:2019/Amd 1:2025)
Größen und Einheiten - Teil 3: Raum und Zeit - Änderung 1 (ISO 80000-3:2019/Amd 1:2025)
Grandeurs et unités - Partie 3: Espace et temps - Amendement 1 (ISO 80000-3:2019/Amd 1:2025)
Veličine in enote - 3. del: Prostor in čas - Dopolnilo 1 (ISO 80000-3:2019/Amd1:2025)
General Information
Relations
Overview
EN ISO 80000-3:2020/A1:2025 is Amendment 1 to Part 3 of the ISO 80000 series, Quantities and units - Space and time. Published as a CEN-endorsed amendment in 2025, it updates terminology, notations and normative references used to express physical quantities and units related to space and time. The amendment aligns Part 3 with the International System of Quantities (ISQ) and the International System of Units (SI) where applicable and clarifies several mathematical expressions in the standard’s tables.
Key Topics
- Normative references: Adds an explicit normative reference to the BIPM publication The International System of Units (SI), 9th edition (2019).
- Terminology alignment: Revises wording to reference the International System of Quantities (ISQ) (see ISO 80000-1) rather than older phrasing about base quantities in the SI.
- Table 1 revisions: Updates names, remarks and notational details for multiple items in the Part 3 quantity table, including:
- Clarified area and spherical-coordinate descriptions (explicitly defining A as the area delimiting a solid angle).
- Corrected notation for differential area elements.
- Replaced instances of the terms “phase velocity” and “group velocity” with “phase speed” and “group speed”, and removed the older velocity entries from the index.
- Small editorial corrections to formulae and symbol usage (e.g., c = ω/k, c = λ f, and dg/dk forms retained but expressed using “speed” nomenclature).
- Index updates: Deletes legacy index entries for “phase velocity” and “group velocity” to reflect the new terminology.
Applications
This amendment is practical for professionals and organizations that require consistent and up-to-date definitions, symbols and notations for spatial and temporal quantities:
- Scientists and engineers working in physics, astronomy, geodesy, acoustics and electromagnetics who must use standardized terminology and formulae.
- Standards bodies and technical committees implementing or endorsing EN/ISO standards at national and regional levels.
- Technical authors, educators and publishers preparing instructional material, scientific papers or textbooks that must comply with current international conventions.
- Software developers and metrology system designers who implement physical quantity libraries, unit conversion tools or measurement-data formats.
Related standards
- ISO 80000-1 (General principles of quantities and units / ISQ)
- BIPM The International System of Units (SI), 9th edition (2019) - now a normative reference for this part
This amendment ensures clearer, consistent usage of terminology and notation for space-and-time quantities, improving interoperability across scientific, engineering and metrology applications.
Frequently Asked Questions
EN ISO 80000-3:2020/A1:2025 is a amendment published by the European Committee for Standardization (CEN). Its full title is "Quantities and units - Part 3: Space and time - Amendment 1 (ISO 80000-3:2019/Amd 1:2025)". This standard covers: Quantities and units - Part 3: Space and time - Amendment 1 (ISO 80000-3:2019/Amd 1:2025)
Quantities and units - Part 3: Space and time - Amendment 1 (ISO 80000-3:2019/Amd 1:2025)
EN ISO 80000-3:2020/A1:2025 is classified under the following ICS (International Classification for Standards) categories: 01.060 - Quantities and units. The ICS classification helps identify the subject area and facilitates finding related standards.
EN ISO 80000-3:2020/A1:2025 has the following relationships with other standards: It is inter standard links to EN ISO 80000-3:2020. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
You can purchase EN ISO 80000-3:2020/A1:2025 directly from iTeh Standards. The document is available in PDF format and is delivered instantly after payment. Add the standard to your cart and complete the secure checkout process. iTeh Standards is an authorized distributor of CEN standards.
Standards Content (Sample)
SLOVENSKI STANDARD
01-november-2025
Veličine in enote - 3. del: Prostor in čas - Dopolnilo 1 (ISO 80000-
3:2019/Amd1:2025)
Quantities and units - Part 3: Space and time - Amendment 1 (ISO 80000-
3:2019/Amd1:2025)
Größen und Einheiten - Teil 3: Raum und Zeit - Änderung 1 (ISO 80000-
3:2019/Amd1:2025)
Grandeurs et unités - Partie 3: Espace et temps - Amendement 1 (ISO 80000-
3:2019/Amd1:2025)
Ta slovenski standard je istoveten z: EN ISO 80000-3:2020/A1:2025
ICS:
01.060 Veličine in enote Quantities and units
07.030 Fizika. Kemija Physics. Chemistry
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EN ISO 80000-3:2020/A1
EUROPEAN STANDARD
NORME EUROPÉENNE
August 2025
EUROPÄISCHE NORM
ICS 01.060
English Version
Quantities and units - Part 3: Space and time - Amendment
1 (ISO 80000-3:2019/Amd 1:2025)
Grandeurs et unités - Partie 3: Espace et temps - Größen und Einheiten - Teil 3: Raum und Zeit -
Amendement 1 (ISO 80000-3:2019/Amd 1:2025) Änderung 1 (ISO 80000-3:2019/Amd 1:2025)
This amendment A1 modifies the European Standard EN ISO 80000-3:2020; 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 80000-3:2020/A1:2025 E
worldwide for CEN national Members.
Contents Page
European foreword . 3
European foreword
This document (EN ISO 80000-3:2020/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 80000-3:2020 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 80000-3:2019/Amd 1:2025 has been approved by CEN as EN ISO 80000-
3:2020/A1:2025 without any modification.
International
Standard
ISO 80000-3
Second edition
Quantities and units —
2019-10
Part 3:
AMENDMENT 1
Space and time
2025-07
AMENDMENT 1
Grandeurs et unités —
Partie 3: Espace et temps
AMENDEMENT 1
Reference number
ISO 80000-3:2019/Amd.1:2025(en) © ISO 2025
ISO 80000-3:2019/Amd.1:2025(en)
© ISO 2025
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
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