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The Non-SI Units of Radiation
The Non-SI Units of Radiation
Published: 2015/12/13
Channel: Max Oerlemans
How to convert units easily - converting non SI units into SI units tutorial
How to convert units easily - converting non SI units into SI units tutorial
Published: 2015/10/12
Channel: Science and Engineering help
non SI unit
non SI unit
Published: 2017/11/13
Channel: intan shaidatul
SI Units and Metric Conversions
SI Units and Metric Conversions
Published: 2014/09/07
Channel: Nicole Stratton
non SI radiation unit GROUP 3
non SI radiation unit GROUP 3
Published: 2017/11/07
Channel: Mimi Jusoh
Non-SI Units and the Equation Mapping Technique
Non-SI Units and the Equation Mapping Technique
Published: 2016/08/25
Channel: DoctorBear
Why the metric system matters - Matt Anticole
Why the metric system matters - Matt Anticole
Published: 2016/07/21
Channel: TED-Ed
Unit Conversion & Significant Figures: Crash Course Chemistry #2
Unit Conversion & Significant Figures: Crash Course Chemistry #2
Published: 2013/02/19
Channel: CrashCourse
Day 3 - Units - Base, Derived, Non-SI - Quiz
Day 3 - Units - Base, Derived, Non-SI - Quiz
Published: 2015/08/25
Channel: Mr. Science Teacher ®
SI Units- Science Skill 1 of 9!
SI Units- Science Skill 1 of 9!
Published: 2016/09/11
Channel: The Science Hutch
Relating Derived Units to the Seven SI Standards
Relating Derived Units to the Seven SI Standards
Published: 2012/11/03
Channel: silencedidgood
Tricks to Memorizing SI Prefixes : Math Conversions
Tricks to Memorizing SI Prefixes : Math Conversions
Published: 2012/07/02
Channel: expertvillage
How to Convert Gal/Min to SI Units : Math Conversions
How to Convert Gal/Min to SI Units : Math Conversions
Published: 2012/07/09
Channel: expertvillage
Oui Non Si
Oui Non Si
Published: 2016/01/04
Channel: Parlez-vous FRENCH?
What is Radiation Measurements (Exposure in Air)
What is Radiation Measurements (Exposure in Air)
Published: 2017/06/01
Channel: RadTechBootCamp
SI Units, Their Prefixes, and Derived Units
SI Units, Their Prefixes, and Derived Units
Published: 2013/09/27
Channel: Crystal Cavelli
The SI measurement system for length
The SI measurement system for length
Published: 2012/10/30
Channel: Steve Watkins
What Is The Unit Of Force In The SI System?
What Is The Unit Of Force In The SI System?
Published: 2017/08/31
Channel: Ask Question
BCLN - SI Units - Chemistry
BCLN - SI Units - Chemistry
Published: 2013/08/08
Channel: B CLN
What Is The SI Unit Of Energy?
What Is The SI Unit Of Energy?
Published: 2017/08/31
Channel: Ask Question
World
World's Roundest Object!
Published: 2013/03/25
Channel: Veritasium
La seconde est atomique - SI - 02
La seconde est atomique - SI - 02
Published: 2017/07/28
Channel: e-penser
[2015] Engineering Fundamentals 02: Unit systems. SI unit system [with closed caption]
[2015] Engineering Fundamentals 02: Unit systems. SI unit system [with closed caption]
Published: 2015/01/12
Channel: Yiheng Wang
Fundamental Quantities and Its SI units
Fundamental Quantities and Its SI units
Published: 2017/08/03
Channel: Learning Center
What Is Pressure And Its SI Unit?
What Is Pressure And Its SI Unit?
Published: 2017/10/05
Channel: Put Put 3
FRENCH: Answering questions with  OUI/NON/SI
FRENCH: Answering questions with OUI/NON/SI
Published: 2015/06/11
Channel: 아줌마라고부르지마시오
Video on Metric System, SI Units, Unit Conversions, and Dimensional Analysis
Video on Metric System, SI Units, Unit Conversions, and Dimensional Analysis
Published: 2017/01/25
Channel: CroftScienceVideos
Converting between derived SI units using the factor label method
Converting between derived SI units using the factor label method
Published: 2015/09/11
Channel: MrHren
La mole, pire que le bématiste - SI - 06
La mole, pire que le bématiste - SI - 06
Published: 2017/08/14
Channel: e-penser
RECENSIONE Moto G5s PLUS: non sempre con la "S" si migliora
RECENSIONE Moto G5s PLUS: non sempre con la "S" si migliora
Published: 2017/08/25
Channel: HDblog
SI Units (Fundamental & Derived)
SI Units (Fundamental & Derived)
Published: 2016/09/13
Channel: Chemistry with Mrs. C. Danks
What Is The Unit Of Acceleration In The SI System?
What Is The Unit Of Acceleration In The SI System?
Published: 2017/07/22
Channel: tell sparky
Fire Emblem Heroes - Narcian Infernal - [F2P units no SI but Camus is 5*]
Fire Emblem Heroes - Narcian Infernal - [F2P units no SI but Camus is 5*]
Published: 2017/08/30
Channel: nstyler
iPhone 8... non si chiamerà così!
iPhone 8... non si chiamerà così!
Published: 2017/06/22
Channel: iPhoneItalia
What Are The Different Units Of Force
What Are The Different Units Of Force
Published: 2017/07/15
Channel: simple sparky
Day 3 - Units - Base, Derived, Non-SI
Day 3 - Units - Base, Derived, Non-SI
Published: 2015/08/25
Channel: Mr. Science Teacher ®
Clarisse: Sniper in the Dark Grand Hero Battle (Infernal, no SI)
Clarisse: Sniper in the Dark Grand Hero Battle (Infernal, no SI)
Published: 2017/09/27
Channel: Hylink
What Is Pressure What Is The SI Unit Of Pressure?
What Is Pressure What Is The SI Unit Of Pressure?
Published: 2017/08/15
Channel: sandy sandy
What Are The Units Of F MA?
What Are The Units Of F MA?
Published: 2017/07/14
Channel: sparky SPARKS
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Published: 2017/07/12
Channel: Veritasium
Derived Unit Conversions #1
Derived Unit Conversions #1
Published: 2016/10/01
Channel: MrsFreyScience
What If the Arabian Empire Reunited Today?
What If the Arabian Empire Reunited Today?
Published: 2017/04/21
Channel: RealLifeLore
What Is The Unit Of Entropy?
What Is The Unit Of Entropy?
Published: 2017/07/15
Channel: sparky TIME
Beginner | Quick answer moi aussi, moi non plus, moi si, moi non
Beginner | Quick answer moi aussi, moi non plus, moi si, moi non
Published: 2014/04/01
Channel: EasyToLearn French
What Is CC As A Unit Of Measurement?
What Is CC As A Unit Of Measurement?
Published: 2017/07/24
Channel: smile sparky
Estrarre disco bloccato dentro dvd che non si apre | Tips & Tricks
Estrarre disco bloccato dentro dvd che non si apre | Tips & Tricks
Published: 2016/02/27
Channel: thesilentube83
Far Cry 5 - Nel Montana di Far Cry non si spara soltanto [Extended Walkthrough]
Far Cry 5 - Nel Montana di Far Cry non si spara soltanto [Extended Walkthrough]
Published: 2017/08/23
Channel: Ubisoft Italia
Perché non si walla con due cittadini - Age of Empires 2 HD
Perché non si walla con due cittadini - Age of Empires 2 HD
Published: 2016/10/25
Channel: Jake Sieghardt
What are Basic SI Units in Hindi/Urdu - Physics Crash Course #05
What are Basic SI Units in Hindi/Urdu - Physics Crash Course #05
Published: 2017/10/21
Channel: Smart Study Education
Converting SI units - km to cm Made EZ.
Converting SI units - km to cm Made EZ.
Published: 2016/02/24
Channel: Avicenna Edu
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WIKIPEDIA ARTICLE

From Wikipedia, the free encyclopedia
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This is a list of units that are not defined as part of the International System of Units (SI), but are otherwise mentioned in the SI,[1][2] because either the General Conference on Weights and Measures (CGPM) accepts their use as being multiples or submultiples of SI-units, they have important contemporary application worldwide, or are otherwise commonly encountered worldwide.

Units officially accepted for use with the SI[edit]

Name Symbol Quantity Equivalent SI unit
Widely used units expected to be used indefinitely
minute min time (SI unit multiple) 1 min = 60 s
hour h time (SI unit multiple) 1 h = 60 min = 3600 s
day d time (SI unit multiple) 1 d = 24 h = 1440 min = 86400 s
degree ° plane angle (dimensionless unit) 1° = (π / 180) rad
minute plane angle (dimensionless unit) 1′ = (1 / 60)° = (π / 10800) rad
second plane angle (dimensionless unit) 1″ = (1 / 60)′ = (1 / 3600)° = (π / 648000) rad
hectare ha area (decimal unit multiple) 1 ha = 100 a = 10000 m2 = 1 hm2
litre l or L volume (decimal unit multiple) 1 L = 1 dm3 = 0.001 m3 = 1000 cm3
tonne t mass (decimal unit multiple) 1 t = 103 kg = 1 Mg
astronomical unit au or AU[1][3] length 1 AU = 1.495978707×1011 m (exact)
Logarithmic units
neper Np level of a field quantity 1 Np = 1[4]
    level of a power quantity 1 Np = 1[5]
bel B level of a field quantity 1 B = ln(10)/2 Np = ln(10)/2[6]
    level of a power quantity
decibel dB level of a field quantity 1 dB = 0.1 B [7]
    level of a power quantity
Units with experimentally determined values
electronvolt eV energy 1 eV = 1.60217653(14)×10−19 J
unified atomic mass unit
dalton
u
Da
mass 1 u = 1 Da = 1.66053886(28)×10−27 kg
Natural units (n.u.)
n.u. of speed (speed of light in vacuum) c0 speed 299792458 m/s (exact)[8]
n.u. of action (reduced Planck constant) ħ action 1.05457168(18)×10−34 J·s
n.u. of mass (electron mass) me mass 9.1093826(16)×10−31 kg
n.u. of time ħ / mec02 time 1.2880886677(86)×10−21 s
Atomic units (a.u.)
a.u. of charge (elementary charge) e electric charge 1.60217653(14)×10−19 C
a.u. of mass (electron mass) me mass 9.1093826(16)×10−31 kg
a.u. of action (reduced Planck constant) ħ action 1.05457168(18)×10−34 J·s
a.u. of length, bohr (Bohr radius) a0 length 0.5291772108(18)×10−10 m
a.u. of energy, hartree (Hartree energy) Eh energy 4.35974417(75)×10−18 J
a.u. of time ħ / Eh time 2.418884326505(16)×10−17 s

Common units not officially sanctioned[edit]

Name Symbol Quantity Equivalent SI unit
ångström, angstrom Å length 1 Å = 0.1 nm = 10−10 m = 100 pm
are a area 1 a = 1 dam2 = 100 m2
barn b area 1 b = 10−28 m2
bar bar pressure 1 bar = 105 Pa
millibar mbar pressure 1 mbar = 1 hPa = 100 Pa
atmosphere atm pressure 1 atm = 1013.25 mbar = 1013.25 hPa = 101325 Pa exactly (commonly used in atmospheric meteorology, in oceanography and for pressures within liquids, or in the industry for pressures within containers of liquefied gas)
dyne per square centimetre (barye) Ba pressure 1 Ba = 0.1 Pa = 0.1 N/m2 = 100 g·cm−1·s−2
millimetre of mercury mmHg pressure 1 mmHg = 133.322387415 Pa at 0 °C = 133.322387415 N/m2 at 0 °C = 133.322387415 kg·cm−1·s−2 at 0 °C
torr Torr pressure 1 Torr = 1/760 atm = 133.322368421... Pa = 133.322368421... N/m2 = 133.322368421... kg·cm−1·s−2

See also[edit]

References[edit]

  1. ^ a b "Units outside the SI". SI brochure (8th edition). BIPM. 2014 [2008]. Retrieved 2015-06-16. 
  2. ^ Taylor, Barry N. (ed.) (2001). "The International System of Units (SI)" (PDF). Special Publication 330. Gaithersburg, Maryland: National Institute of Standards and Technology (NIST). 
  3. ^ "Manuscript Preparation: AJ & ApJ Author Instructions". American Astronomical Society. Retrieved 2015-06-15. 
  4. ^ LF = ln(F / F0) Np
  5. ^ LP = 12 ln(P / P0) Np
  6. ^ LF = 2 log10(F / F0) B
  7. ^ LP = log10(P / P0) B
  8. ^ In this case it is not the speed of light, but the length of the metre that is obtained by experiment

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