Units
0.9.0

Basics

  • Introduction
    • Why?
      • Design Requirements
        • How It Works
        • Testing
        • Sources of Unit String Definitions
        • Converter App
  • Installation and Linking
    • Header Only Use
    • Compiled Usage
    • Standalone Library
    • Python Library
      • Unit Library CMake Reference
        • CMake variables
        • CMake Targets
        • Example
  • User Guide
    • Units
      • Basic Unit Types
        • Derived Units
      • Basic operations
      • Comparison Operators
      • Methods
        • Special Units
        • Custom Units
        • Equation Units
        • Custom Counting Units
    • Measurements
      • Precise measurements
    • Fixed Measurements
      • Relationship with numbers
      • Interactions with measurement
    • Uncertain Measurements
      • Constructors
      • Additional operators
      • String operations
    • Units From Strings
      • Unit Strings
      • Measurement strings
      • Uncertain Measurements
    • Units To Strings
      • Advanced Usage
      • Stream Operators
      • Underlying Conversion Map Access
    • Math Operations
      • Type traits
      • Rounding and Truncation
      • Trigonometric functions
      • Multiplies and divides
      • Others
    • Commodities
      • Methods
        • Custom Commodities
      • Commodities to names
      • String To Commodities
      • Defined Commodities
    • User defined units
      • Defining a custom unit
      • Input File
      • Other Library Operations
      • Notes on units and threads
    • Physical constants
      • Defined constants
      • Planck Units
      • Atomic units
      • Numbers
      • Planetary masses
      • From Strings
      • Uncertainties
    • Defined Units
      • Listing of Units
        • Base Units
        • Specialized units
        • Numerical Units
        • Derived SI Units
        • Extra SI related units
        • Centimeter-Gram-Second system
        • Conventional Electrical Units
        • Meter Gram Force System
        • Meter Tonne Second system
        • Additional Time units
        • International customary Units
        • Avoirdupois units
        • Troy Units
        • United States Customary Units
        • FDA and metric measures
        • Canadian Units
        • Australia Units
        • Imperial or British Units
        • Apothecaries System
        • Nautical Units
        • Japanese traditional Units
        • Chinese Traditional Units
        • Typographic units
        • Distance Units
        • Area Units
        • Mass Units
        • Volume Units
        • Angle Units
        • Directional Units
        • Temperature Units
        • Pressure Units
        • Power Units
        • Energy Units
        • Power system Units
        • Equation type Units
        • Textile related Units
        • Clinical Units
        • Laboratory Units
        • Data Units
        • Computation units
        • Special units
        • Other Units
        • Climate Units
        • Speed Units
      • Units in the units namespace
    • Custom Units
      • Custom units in Use
      • Implementation Details
    • Custom Counting Units
      • Custom count units in Use
      • Implementation details
    • Unit Domains
      • Available Domains
      • Domain Specific Units
        • UCUM
        • Astronomy
        • Cooking
        • Surveying
        • Nuclear
        • Climate
        • US customary
        • All domains
      • Specifying the domain
    • Conversion Flags
      • Unit_from_string flags
        • Indications for use
      • to_string Flags
        • Default flags
    • Special Units
      • Default Unit
      • Error Unit
      • Invalid Unit
      • one
    • Equation Units
    • Python
      • Usage
  • Application Notes
    • Strain
      • Method 1
      • Method 2
      • Method 3
      • Discussion
  • The Low Level Details of the Units library
    • Unit base class
      • Math operations
        • Power and Root and Inv functions
      • Getters
      • Modifiers
      • Comparisons
    • Commodity Details
      • Control code
        • Direct definitions
        • Custom Commodity
        • Normal Commodity with Form Factor
        • Normal Commodity
    • Parsing of squared and cubic
  • Units on the Web
    • Rest API
Units
  • Search

© Copyright 2019-2025, Lawrence Livermore National Security, LLC;See the top-level NOTICE for additional details. All rights reserved. SPDX-License-Identifier: BSD-3-Clause . Last updated on Apr 12, 2025.

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