This Technical Specification specifies identifiers for units to support computer-based processing of product data. It provides a survey of quantities with associated collections of internationally standardized as well as non-standardized units used in business and science.

In scope are any standard or non-standard units of measure currently in use, in two or more distinct ethno-linguistic groups or nations, at least in one domain of industry, for which an explicit method of conversion to a known standard unit of measure or its equivalent is well documented or evident from external references.

NOTE 1 The document collects units commonly used in business data. It does not purport to be complete. The standardization of units or parts thereof is out of scope.

NOTE 2 Having assigned an identifier by being mentioned in IEC 62720 does not imply that the unit of measure in question or parts thereof may be considered to be standardized.

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PDF Pages	PDF Title
4	English CONTENTS
14	FOREWORD
16	INTRODUCTION
17	1 Scope 2 Normative references 3 Terms and definitions
18	Tables Table 1 – Concepts for quantities
19	Table 2 – Base quantity and base unit
21	Table 3 – Base quantities
23	4 Relations between quantities, units and their systems 4.1 General 4.2 The International System of Quantities and the International System of Units
24	Table 4 – Base quantities and base units in the International System of Units Table 5 – Representation of base quantities in the International System of Units [34]
25	4.3 Other systems of quantities and units 4.4 Context of units, quantities, and systems of units Figures Figure 1 – Overview about the relationships between the tables contained in the annexes
26	5 SI prefixes and SI prefix symbols 5.1 General 5.2 Formation of multiples and factors to the base of 10 Table 6 – Formation of multiples and factors of units to the base of 10
27	5.3 Formation of multiples to the base of 2 5.4 Usage of SI prefixes and SI prefix symbols 5.4.1 General 5.4.2 Combination of SI prefixes, SI prefix symbols, names of units and symbols for units Table 7 – Formation of multiples of units to the base of 2
28	5.4.3 Use of power exponentials in conjunction with SI prefixes, SI prefix symbols, names of units or symbols for units. 5.4.4 Restrictions on combining SI prefixes, SI prefix symbols, names of units and symbols for units 5.5 Selecting SI prefixes and SI prefix symbols 6 Data sources of units Table 8 – Units that are used without prefixes or prefix symbols
29	7 Identification of units Figure 2 – International registration data identifier (IRDI), Source: ISO 11179-6:2005
30	Annex A (informative) Information about units
31	Annex B (normative) Identifiers for units and quantities that are derived from the SI system of units Figure B.1 – Structure of table headers Table B.1 – Absorbed dose
32	Table B.2 – Absorbed dose rate Table B.3 – Acceleration
33	Table B.4 – Active power
34	Table B.5 – Amount of substance Table B.6 – Amount of substance concentration
35	Table B.7 – Angular acceleration Table B.8 – Angular crosssection Table B.9 – Angular momentum
36	Table B.10 – Angular velocity Table B.11 – Angular wave number Table B.12 – Apparent power
37	Table B.13 – Areic bit density Table B.14 – Areic charge density
38	Table B.15 – Areic mass Table B.16 – Avogadro constant Table B.17 – Bandwidth distance product
39	Table B.18 – Battery capacity Table B.19 – Bit rate Table B.20 – Burst factor
40	Table B.21 – Byte rate Table B.22 – Capacitance
41	Table B.23 – Catalytic activity Table B.24 – Catalytic activity concentration
42	Table B.25 – Celsius temperature Table B.26 – Compressibility Table B.27 – Conductivity
43	Table B.28 – Crosssection Table B.29 – Dataset of bits
44	Table B.30 – Dataset of bytes Table B.31 – Density
45	Table B.32 – Density of states Table B.33 – Diffusion constant, thermal diffusivity Table B.34 – Digit rate
46	Table B.35 – Dose equivalent Table B.36 – Dose equivalent rate
47	Table B.37 – Dynamic viscosity Table B.38 – Einstein coefficients
48	Table B.39 – Electric charge Table B.40 – Electrical conductance
49	Table B.41 – Electric current
50	Table B.42 – Electric current density Table B.43 – Electric dipole moment
51	Table B.44 – Electric field strength Table B.45 – Electric flux density
52	Table B.46 – Electric polarization Table B.47 – Electric resistance
53	Table B.48 – Energy content Table B.49 – Energy density
54	Table B.50 – Equilibrium constant based on concentration Table B.51 – Equilibrium constant based on pressure Table B.52 – Exposure rate
55	Table B.53 – Failure rate Table B.54 – Faraday constant Table B.55 – First radiation constant
56	Table B.56 – Force Table B.57 – Force constant
57	Table B.58 – Frequency Table B.59 – Gas leak rate Table B.60 – Gradient
58	Table B.61 – Gravitational constant Table B.62 – Hall coefficient Table B.63 – I²tvalue, Joule integral
59	Table B.64 – Illumination Table B.65 – Impulse Table B.66 – Incidence
60	Table B.67 – Inductance Table B.68 – Information content
61	Table B.69 – Ionic strength Table B.70 – Irradiance Table B.71 – Josephson constant
62	Table B.72 – Kinematic viscosity Table B.73 – Kinetic energy
63	Table B.74 – Length Table B.75 – Linear expansion coefficient Table B.76 – Lineic bit density
64	Table B.77 – Lineic electric charge, linear electric charge density Table B.78 – Lineic electric current, linear electric current density
65	Table B.79 – Lineic force
66	Table B.80 – Lineic logarithmic ratio, linear attenuation, linear loss Table B.81 – Lineic mass
67	Table B.82 – Lineic power
68	Table B.83 – Lineic resistance
69	Table B.84 – Lineic torque Table B.85 – Logarithmic frequency interval Table B.86 – Logarithmic frequency interval to base 10
70	Table B.87 – Logarithmic ratio to base 10 Table B.88 – Logarithmic ratio to base e Table B.89 – Lorenz coefficient
71	Table B.90 – Loudness Table B.91 – Loudness level Table B.92 – Luminance
72	Table B.93 – Luminous efficacy Table B.94 – Luminous exitance Table B.95 – Luminous exposure
73	Table B.96 – Luminous flux Table B.97 – Luminous intensity Table B.98 – Magnetic dipole moment
74	Table B.99 – Magnetic dipole moment of a molecule Table B.100 – Magnetic field strength, magnetizing field strength
75	Table B.101 – Magnetic flux Table B.102 – Magnetic flux density Table B.103 – Magnetic moment
76	Table B.104 – Magnetic polarization Table B.105 – Magnetic vector potential
77	Table B.106 – Mass Table B.107 – Mass attenuation coefficient
78	Table B.108 – Mass density
79	Table B.109 – Mass flow rate Table B.110 – Mass flux density
80	Table B.111 – Mass ratio Table B.112 – Massic activity, specific activity
81	Table B.113 – Massic electric current Table B.114 – Massic heat capacity, specific heat capacity
82	Table B.115 – Massic power, specific power Table B.116 – Massic torque Table B.117 – Mechanical impedance
83	Table B.118 – Median information flow, expressed as a binary logarithm Table B.119 – Median information flow, expressed as a common logarithm Table B.120 – Median information flow, expressed as a natural logarithm Table B.121 – Mobility
84	Table B.122 – Molar attenuation coefficient Table B.123 – Molar conductivity Table B.124 – Molar flow rate
85	Table B.125 – Molar heat capacitiy Table B.126 – Molar internal energy Table B.127 – Molar mass Table B.128 – Molar optical rotatory power
86	Table B.129 – Molar volume Table B.130 – Moment of inertia Table B.131 – Motor constant
87	Table B.132 – Mass stopping power, atomic stopping power Table B.133 – Nuclear energy Table B.134 – Particle current density Table B.135 – Particle fluence
88	Table B.136 – Permeability Table B.137 – Permeance
89	Table B.138 – Permittivity Table B.139 – Photon intensity Table B.140 – Photon luminance
90	Table B.141 – Planck’s constant Table B.142 – Plane angle Table B.143 – Polarizability
91	Table B.144 – Pressure Table B.145 – Pressure coefficient
92	Table B.146 – Pressure gradient Table B.147 – Pressure in relation to volume flow rate Table B.148 – Quantity Table B.149 – Quantity of light
93	Table B.150 – Radiance, total radiance Table B.151 – Radiant energy exposure Table B.152 – Radiant exposure Table B.153 – Radiant intensity
94	Table B.154 – Radioactive decay Table B.155 – Rate of rise of voltage
95	Table B.156 – Ratio Table B.157 – Reactive power
96	Table B.158 – Reciprocal energy Table B.159 – Reciprocal mass
97	Table B.160 – Reciprocal voltage Table B.161 – Reluctance Table B.162 – Repetency
98	Table B.163 – Resistivity Table B.164 – Richardson constant Table B.165 – Rotary-translatory motion conversion
99	Table B.166 – Scalar magnetic potential Table B.167 – Second moment of area (axial) Table B.168 – Second moment of area (polar)
100	Table B.169 – Second radiation constant Table B.170 – Section modulus Table B.171 – Seebeck coefficient
101	Table B.172 – Slowingdown density Table B.173 – Solid angle Table B.174 – Sound exposure
102	Table B.175 – Specific (internal) energy Table B.176 – Specific optical rotational ability
103	Table B.177 – Specific volume Table B.178 – Spectral angular crosssection Table B.179 – Spectral crosssection
104	Table B.180 – Spectral density of vibrational modes Table B.181 – Spectral radiant energy density in terms of wavelength Table B.182 – State density as expression of angular frequency
105	Table B.183 – StefanBoltzmann constant Table B.184 – Surface Table B.185 – Surfacerelated volume flow rate
106	Table B.186 – Surface tension Table B.187 – Surge impedance of the medium
107	Table B.188 – Temperature change rate, rate of change of temperature Table B.189 – Thermal capacitance Table B.190 – Thermal coefficient of linear expansion
108	Table B.191 – Thermal conductance Table B.192 – Thermal conductivity Table B.193 —Thermal energy
109	Table B.194 – Thermal insulation Table B.195 – Thermal resistance Table B.196 – Thermal resistivity Table B.197 – Thermal transmittance
110	Table B.198 – Thermodynamic temperature Table B.199 – Time
111	Table B.200 – Time constant Table B.201 – Timerelated logarithmic ratio Table B.202 – Torque
112	Table B.203 – Torque constant Table B.204 – Torsional rigidity Table B.205 – Total linear stopping power Table B.206 – Total mass stopping power
113	Table B.207 – Traffic intensity Table B.208 – Unbalance Table B.209 – Variation (due to modified position) Table B.210 – Variation (due to output load)
114	Table B.211 – Variation of density (due to pressure) Table B.212 – Variation of dynamic viscosity (due to pressure) Table B.213 – Variation of dynamic viscosity (due to temperature) Table B.214 – Variation of electric current (due to pressure)
115	Table B.215 – Variation of kinematic viscosity (due to pressure) Table B.216 – Variation of kinematic viscosity (due to temperature) Table B.217 – Variation of level (due to pressure) Table B.218 – Variation of level (due to temperature)
116	Table B.219 – Variation of mass (due to pressure) Table B.220 – Variation of mass (due to temperature)
117	Table B.221 – Variation of mass density (due to temperature) Table B.222 – Variation of mass flow rate (due to pressure)
118	Table B.223 – Variation of mass flow rate (due to temperature) Table B.224 – Variation of molality (due to pressure) Table B.225 – Variation of molality (due to temperature) Table B.226 – Variation of molar concentration (due to pressure)
119	Table B.227 – Variation of molar concentration (due to temperature) Table B.228 – Variation of pressure (due to pressure) Table B.229 – Variation of temperature (due to pressure) Table B.230 – Variation of temperature (due to temperature) Table B.231 – Variation of velocity (due to pressure)
120	Table B.232 – Variation of velocity (due to temperature) Table B.233 – Variation of voltage (due to pressure) Table B.234 – Variation of volume (due to pressure) Table B.235 – Variation of volume (due to temperature)
121	Table B.236 – Variation of volume flow rate (due to pressure) Table B.237 – Variation of volume flow rate (due to temperature)
122	Table B.238 – Velocity
123	Table B.239 – Voltage
124	Table B.240 – Volume
125	Table B.241 – Volume flow rate
126	Table B.242 – Volume fraction Table B.243 – Volumic bit density
127	Table B.244 – Volumic electric charge, electric charge density Table B.245 – Volumic output power
128	Table B.246 – Water vapour permeability
129	Annex C (normative) Identifiers for units and quantities that are not derived from the SI system of units Figure C.1 – Structure of table headers
130	Table C.1 – Absolute typographic measurement Table C.2 – Acceleration
131	Table C.3 – Active power Table C.4 – Amount of substance Table C.5 – Angular velocity
132	Table C.6 – Areic mass Table C.7 – Amount of biologically active substance Table C.8 – Catalytic activity Table C.9 – Catalytic activity concentration Table C.10 – Compressibility Table C.11 – Density
133	Table C.12 – Diffusion constant Table C.13 – Dose equivalent Table C.14 – Dose equivalent rate Table C.15 – Dots per inch
134	Table C.16 – Dynamic viscosity Table C.17 – Earthquake magnitude Table C.18 – Electric charge Table C.19 – Electric current
135	Table C.20 – Electric field strength Table C.21 – Electrical conductance Table C.22 – Energy density Table C.23 – Exposure rate Table C.24 – Fahrenheit temperature
136	Table C.25 – Floating-point calculation capability Table C.26 – Fluidity Table C.27 – Force Table C.28 – Gas leak rate
137	Table C.29 – Illuminance Table C.30 – Impulse Table C.31 – Ionic strength Table C.32 – Irradiance Table C.33 – Kinematic viscosity
138	Table C.34 – Kinetic energy
139	Table C.35 – Length Table C.36 – Linear expansion coefficient Table C.37 – Lineic electric current
140	Table C.38 – Lineic force Table C.39 – Lineic mass Table C.40 – Lineic torque Table C.41 – Luminance Table C.42 – Luminous exitance
141	Table C.43 – Luminous intensity Table C.44 – Mach number Table C.45 – Magnetic field strength, magnetizing field strength Table C.46 – Magnetic flux Table C.47 – Magnetic flux density
142	Table C.48 – Magnetic polarization Table C.49 – Mass
143	Table C.50 – Mass density
144	Table C.51 – Mass flow rate Table C.52 – Mass ratio Table C.53 – Mass stopping power Table C.54 – Massic activity
145	Table C.55 – Massic heat capacity Table C.56 – Massic power Table C.57 – Massic torque Table C.58 – Molar flow rate Table C.59 – Mechanical impedance Table C.60 – Moment of inertia
146	Table C.61 – Particle fluence Table C.62 – Picture element Table C.63 – Plane angle
147	Table C.64 – Pressure
148	Table C.65 – Pressure coefficient Table C.66 – Pressure gradient Table C.67 – Pressure in relation to volume flow rate Table C.68 – Radiant energy exposure
149	Table C.69 – Radiant exposure Table C.70 – Radioactive decay Table C.71 – Rankine temperature Table C.72 – Ratio
150	Table C.73 – Reciprocal mass Table C.74 – Repetency Table C.75 – Rotary-translatory motion conversion
151	Table C.76 – Section modulus
152	Table C.77 – Second moment of area (axial) Table C.78 – Specific (internal) energy Table C.79 – Specific volume Table C.80 – Spectral angular crosssection Table C.81 – Spectral crosssection Table C.82 – Spin quantum number
153	Table C.83 – Sun protection factor of a product Table C.84 – Surface Table C.85 – Surfacerelated volume flow rate Table C.86 – Surface tension Table C.87 – Surge impedance of the medium
154	Table C.88 – Temperature change rate Table C.89 – Thermal capacitance Table C.90 – Thermal conductivity
155	Table C.91 —Thermal energy Table C.92 – Thermal insulation
156	Table C.93 – Thermal resistance Table C.94 – Thermal resistivity Table C.95 – Thermal transmittance Table C.96 – Time
157	Table C.97 – Torque Table C.98 – Torque constant Table C.99 – Total linear stopping power Table C.100 – Total mass stopping power Table C.101 – Unbalance Table C.102 – Variation of density (due to pressure)
158	Table C.103 – Variation of dynamic viscosity (due to pressure) Table C.104 – Variation of dynamic viscosity (due to temperature) Table C.105 – Variation of electric current (due to pressure) Table C.106 – Variation of kinematic viscosity (due to pressure) Table C.107 – Variation of kinematic viscosity (due to temperature) Table C.108 – Variation of level (due to pressure)
159	Table C.109 – Variation of level (due to temperature) Table C.110 – Variation of mass (due to pressure) Table C.111 – Variation of mass (due to temperature) Table C.112 – Variation of mass density (due to temperature) Table C.113 – Variation of mass flow rate (due to pressure)
160	Table C.114 – Variation of mass flow rate (due to temperature) Table C.115 – Variation of pressure (due to pressure) Table C.116 – Variation of temperature (due to pressure) Table C.117 – Variation of temperature (due to temperature) Table C.118 – Variation of voltage (due to pressure) Table C.119 – Variation of volume (due to pressure)
161	Table C.120 – Variation of volume (due to temperature) Table C.121 – Variation of velocity (due to pressure) Table C.122 – Variation of velocity (due to temperature) Table C.123 – Velocity
162	Table C.124 – Volume flow rate
164	Table C.125 – Volume Table C.126 – Water vapour permeability
165	Annex D (normative) Identifiers for unit systems Table D.1 – Unit systems
166	Annex E (informative) XML representation of units Table E.1 – XML – representation of unit symbols
262	Bibliography

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Status	Withdrawn
Title	Identification of units of measurement for computer-based processing
Publisher	BSI
Committee	GEL/3
Pages	266
Publication Date	2013-07-31
Withdrawn Date	2017-02-28
Replaced By	PD IEC/TS 62720:2017
ISBN	978 0 580 74716 8
Standard Number	PD IEC/TS 62720:2013
Identical National Standard Of	IEC TS 62720:2013
Descriptors	SI system (metric), Units of measurement, Symbols, Definitions, Mathematical symbols, Quantity, Standardized parameters, Formulae (mathematics), Printing, Measurement, Numbers, Typography
ICS Codes	35.240.50 - IT applications in industry

BSI PD IEC/TS 62720:2013

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