ISO 80000-11:2019/Amd 1:2025
(Amendment)Quantities and units - Part 11: Characteristic numbers - Amendment 1
Quantities and units - Part 11: Characteristic numbers - Amendment 1
Grandeurs et unités — Partie 11: Nombres caractéristiques — Amendement 1
General Information
- Status
- Published
- Publication Date
- 23-Jul-2025
- Technical Committee
- ISO/TC 12 - Quantities and units
- Drafting Committee
- ISO/TC 12 - Quantities and units
- Current Stage
- 6060 - International Standard published
- Start Date
- 24-Jul-2025
- Due Date
- 31-May-2026
- Completion Date
- 24-Jul-2025
Relations
- Effective Date
- 10-Jun-2023
- Effective Date
- 03-Jun-2023
Overview
ISO 80000-11:2019/Amd 1:2025 is an important amendment to the international standard ISO 80000-11:2019, titled Quantities and Units - Part 11: Characteristic Numbers. Published by the International Organization for Standardization (ISO), this document updates and refines definitions, units, and conventions related to characteristic numbers used in scientific, engineering, and technical contexts. It aligns characteristic numbers with the International System of Units (SI) to ensure consistency, clarity, and international interoperability in measurement and technical communication.
This amendment is essential for professionals working with quantities and units in fields such as physics, engineering, and metrology who require authoritative guidance on characteristic numbers and their standardized notation.
Key Topics
Integration with SI Units
This amendment incorporates references to the latest edition of the International System of Units (the 9th edition, 2019), ensuring that all characteristic number quantities conform to the most current SI framework.Updated Terms and Definitions
Revised terms and definitions clarify the names, symbols, and units associated with characteristic numbers, as specified in detailed tables (Tables 1 to 6). These updates provide precise and uniform terminology across industries.Normative References
The amendment replaces the prior statement of having no normative references and explicitly includes the SI Brochure (BIPM, 9th edition, 2019) as a normative document. This change strengthens the linkage between characteristic numbers and the international measurement system.Standardization Governance
Produced by ISO Technical Committee ISO/TC 12 (Quantities and Units) in collaboration with IEC/TC 25 and CEN, the amendment reflects a consensus-driven update informed by global experts in standardization.
Applications
ISO 80000-11:2019/Amd 1:2025 supports a wide range of practical applications, including:
Scientific Research
Enables scientists to accurately and unambiguously express characteristic numbers such as Reynolds number, Mach number, or other dimensionless parameters important for experimental and theoretical analyses.Engineering and Design
Assists engineers in correctly using standardized quantities during the design, testing, and optimization of systems, especially in fluid dynamics, thermodynamics, and other areas relying on characteristic numbers.International Trade and Compliance
Facilitates compliance with internationally recognized measurement standards, improving communication and reducing technical barriers in the exchange of scientific and engineering data.Instrumentation and Calibration
Ensures that instrument manufacturers and calibration laboratories apply consistent definitions and units, fostering interoperability and reliability in measurement devices.
Related Standards
The amendment is part of the broader ISO 80000 series, which addresses quantities and units across various physical domains. Related standards include:
- ISO 80000-1:2009 – General principles for quantities and units
- ISO 80000-2:2019 – Mathematical signs and symbols
- ISO 80000-13:2008 – Solid state physics quantities and units
- BIPM SI Brochure (9th Edition, 2019) – International System of Units, providing foundational definitions referenced in this amendment
By adhering to ISO 80000-11:2019/Amd 1:2025, organizations and professionals ensure that the use and communication of characteristic numbers meet rigorous international standards, promoting precision, interoperability, and clarity in global scientific and technical endeavors.
Keywords: ISO 80000-11 amendment, characteristic numbers standard, quantities and units, International System of Units, SI units, ISO standards 2025, engineering measurement standards, scientific quantities, metrology, international standardization.
ISO 80000-11:2019/Amd 1:2025 - Quantities and units — Part 11: Characteristic numbers — Amendment 1 Released:24. 07. 2025
ISO 80000-11:2019/Amd 1:2025 - Grandeurs et unités — Partie 11: Nombres caractéristiques — Amendement 1 Released:24. 07. 2025
REDLINE ISO 80000-11:2019/Amd 1:2025 - Grandeurs et unités — Partie 11: Nombres caractéristiques — Amendement 1 Released:24. 07. 2025
Frequently Asked Questions
ISO 80000-11:2019/Amd 1:2025 is a standard published by the International Organization for Standardization (ISO). Its full title is "Quantities and units - Part 11: Characteristic numbers - Amendment 1". This standard covers: Quantities and units - Part 11: Characteristic numbers - Amendment 1
Quantities and units - Part 11: Characteristic numbers - Amendment 1
ISO 80000-11:2019/Amd 1:2025 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.
ISO 80000-11:2019/Amd 1:2025 has the following relationships with other standards: It is inter standard links to ISO 2385:2020, ISO 80000-11:2019. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
You can purchase ISO 80000-11:2019/Amd 1:2025 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 ISO standards.
Standards Content (Sample)
International
Standard
ISO 80000-11
Second edition
Quantities and units —
2019-10
Part 11:
AMENDMENT 1
Characteristic numbers
2025-07
AMENDMENT 1
Grandeurs et unités —
Partie 11: Nombres caractéristiques
AMENDEMENT 1
Reference number
ISO 80000-11:2019/Amd.1:2025(en) © ISO 2025
ISO 80000-11:2019/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
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii
ISO 80000-11:2019/Amd.1:2025(en)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out through
ISO technical committees. Each member body interested in a subject for which a technical committee
has been established has the right to be represented on that committee. International organizations,
governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely
with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are described
in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the different types
of ISO documents should be noted. This document was drafted in accordance with the editorial rules of the
ISO/IEC Directives, Part 2 (see www.iso.org/directives).
ISO draws attention to the possibility that the implementation of this document may involve the use of (a)
patent(s). ISO takes no position concerning the evidence, validity or applicability of any claimed patent
rights
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Norme
internationale
ISO 80000-11
Deuxième édition
Grandeurs et unités —
2019-10
Partie 11:
AMENDEMENT 1
Nombres caractéristiques
2025-07
AMENDEMENT 1
Quantities and units —
Part 11: Characteristic numbers
AMENDMENT 1
Numéro de référence
ISO 80000-11:2019/Amd.1:2025(fr) © ISO 2025
ISO 80000-11:2019/Amd.1:2025(fr)
DOCUMENT PROTÉGÉ PAR COPYRIGHT
© ISO 2025
Tous droits réservés. Sauf prescription différente ou nécessité dans le contexte de sa mise en œuvre, aucune partie de cette
publication ne peut être reproduite ni utilisée sous quelque forme que ce soit et par aucun procédé, électronique ou mécanique,
y compris la photocopie, ou la diffusion sur l’internet ou sur un intranet, sans autorisation écrite préalable. Une autorisation peut
être demandée à l’ISO à l’adresse ci-après ou au comité membre de l’ISO dans le pays du demandeur.
ISO copyright office
Case postale 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Genève
Tél.: +41 22 749 01 11
E-mail: copyright@iso.org
Web: www.iso.org
Publié en Suisse
ii
ISO 80000-11:2019/Amd.1:2025(fr)
Avant-propos
L’ISO (Organisation internationale de normalisation) est une fédération mondiale d’organismes nationaux
de normalisation (comités membres de l’ISO). L’élaboration des Normes internationales est en général
confiée aux comités techniques de l’ISO. Chaque comité membre intéressé par une étude a le droit de faire
partie du comité technique créé à cet effet. Les organisations internationales, gouvernementales et non
gouvernementales, en liaison avec l’ISO participent également aux travaux. L’ISO collabore étroitement avec
la Commission électrotechnique internationale (IEC) en ce qui concerne la normalisation électrotechnique.
Les procédures utilisées pour élaborer le présent document et celles destinées à sa mise à jour sont
décrites dans les Directives ISO/IEC, Partie 1. Il convient, en particulier, de prendre note des différents
critères d'approbation requis pour les différents types de documents ISO. Le présent document
a été rédigé conformément aux règles de rédaction données dans les Directives ISO/IEC, Partie 2
(voir www.iso.org/directives).
L’ISO attire l’attention sur le fait que la mise en application du présent document peut entraîner l’utilisation
d’un ou de plusieurs brevets. L’ISO ne prend pas position quant à la preuve, à la validité et à l’applicabilité
de tout droit de brevet revendiqué à cet égard. À la date de publication du présent document, l’ISO n’avait
pas reçu notification qu’un ou plusieurs brevets pouvaient être nécessaires à sa mise
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© ISO 2025
Formatted: Default Paragraph Font, French (France)
Formatted: Default Paragraph Font, French (France)
Tous droits réservés. Sauf prescription différente ou nécessité dans le contexte de sa mise en œuvreoeuvre, aucune partie
de cette publication ne peut être reproduite ni utilisée sous quelque forme que ce soit et par aucun procédé, électronique
Formatted: French (France)
ou mécanique, y compris la photocopie, ou la diffusion sur l’internet ou sur un intranet, sans autorisation écrite préalable.
Formatted: Adjust space between Latin and Asian text,
Une autorisation peut être demandée à l’ISO à l’adresse ci-après ou au comité membre de l’ISO dans le pays du
Adjust space between Asian text and numbers
demandeur.
Formatted: French (France)
ISO copyright office
Formatted: French (France)
CP 401 • Ch. de Blandonnet 8
Formatted: English (United Kingdom)
CH-1214 Vernier, GenèveGeneva
Tél.:Phone: + 41 22 749 01 11
Formatted: English (United Kingdom)
E-mail: copyright@iso.org
Formatted: French (France)
Web: www.iso.org
Website: www.iso.org
Publié en Suisse
Formatted: French (France)
Formatted: Adjust space between Latin and Asian text,
Adjust space between Asian text and numbers
© ISO 2025 – Tous droits réservés
ii
ISO 80000-11:2019/Amd. 1:2025(fr) Formatted: Font: 11 pt
Formatted: Font: 11 pt
Avant-propos Formatted: French (France)
Formatted: Adjust space between Latin and Asian text,
L’ISO (Organisation internationale de normalisation) est une fédération mondiale d’organismes nationaux de
Adjust space between Asian text and numbers
normalisation (comités membres de l’ISO). L’élaboration des Normes internationales est en général confiée
aux comités techniques de l’ISO. Chaque comité membre intéressé par une étude a le droit de faire partie du
comité technique créé à cet effet. Les organisations internationales, gouvernementales et non
gouvernementales, en liaison avec l’ISO participent également aux travaux. L’ISO collabore étroitement avec
la Commission électrotechnique internationale (IEC) en ce qui concerne la normalisation électrotechnique.
Les procédures utilisées pour élaborer le présent document et celles destinées à sa mise à jour sont décrites
dans les Directives ISO/IEC, Partie 1. Il convient, en particulier, de prendre
...
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