Content code
s1519
Slug (identifier)
units-of-measurement-in-science
Parent content
Grades
Secondary I
Secondary II
Secondary III
Secondary IV
Topic
Science and Technology
Content
Title (level 2)
Quantities and Their Symbols
Title slug (identifier)
quantities-and-their-symbols
Contenu
Corps
The International System of Units (SI) is an internationally recognized system. It brings together the most commonly used units of measurement in order to facilitate exchanges in the scientific, technological, and educational fields. The table below shows the most commonly used units of measure in science. Some of the basic units of the international system are shown in blue:
| Name of quantity measured | Unit of measurement name | Unit of measurement symbol |
| Acceleration |(a)| | Metres per second squared | |\text{m/s}^2| |
| Area |(A)| |
Centimetre squared
Metre squared
Hectare
|
|\text{cm}^2|
|\text{m}^2|
|\text{ha}|
|
| Angle (|\theta|) | Degree | |^{\circ}| |
| Specific heat capacity |(c)| |
Joule per gram degree Celsius
Kilojoule per kilogram degree Celsius
|
|\text{J/g} \cdot ^\circ \text{C}|
|\text{kJ/kg} \cdot ^\circ \text{C}|
|
| Concentration |(C)| |
Gram per litre
Parts per million Percentage Mole per litre
|
|\text{g/L}|
|\text{ppm}| |\%| |\text{mol/L}|
|
| Potential difference |(U)| | Millivolt Volt |
|\text{mV}| |\text{V}| |
| Distance |(d)| |
Millimetre
Centimetre
Decimetre
Metre
Kilometre
|
|\text{mm}|
|\text{cm}|
|\text{dm}|
|\color{blue}{\text{m}}|
|\text{km}|
|
| Energy |(E)| |
Joule
Kilojoule
|
|\text{J}|
|\text{kJ}|
|
| Force |(F)| | Newton | |\text{N}| |
| Current intensity |(I)| | Ampere Milliampere |
|\color{blue}{\text{A}}| |\text{mA}| |
| Light intensity |(I)| | Candela | |\color{blue}{\text{cd}}| |
| Mass |(m)| |
Milligram
Gram
Kilogram
Tonne
|
|\text{mg}|
|\text{g}|
|\color{blue}{\text{kg}}|
|\text{t}|
|
| Molar mass |(M)| | Gram per mole | |\text{g/mol}| |
| Density (|\large{\rho}|) | Gram per millilitre | |\text{g/mL}| |
| Number of moles |(n)| | Mole | |\color{blue}{\text{mol}}| |
| Pressure |(P)| |
Pascal
Kilopascal
Atmosphere
Millimetre of mercury
|
|\text{Pa}|
|\text{kPa}|
|\text{atm}|
|\text{mm Hg}|
|
| Power |(W)| | Kilowatt Watt |
|\text{kW}| |\text{W}| |
| Solubility |
Gram per litre
Gram per 100 millilitres
|
|\text{g/L}|
|\text{g/100mL}|
|
| Temperature |(T)| |
Degree Celsius
Degree Fahrenheit
Kelvin
|
|^\circ \text{C}|
|^\circ \text{F}|
|\color{blue}{\text{K}}|
|
| Time |(t)| |
Second
Minute
Hour
|
|\color{blue}{\text{s}}|
|\text{min}|
|\text{h}|
|
| Work |(W)| | Joule | |\text{J}| |
| Speed or velocity |(v)| |
Metre per second
|
|\text{m/s}|
|
| Volume |(V)| |
Cubic centimetre
Cubic metre
Millilitre
Litre
|
|\text{cm}^3|
|\text{m}^3|
|\text{mL}|
|\text{L}|
|
Content
Text
For other units of measurement, it is possible to consult the following concept sheets:
Links
Type
Internal
Title
Units of Measurement in Physics
Title (level 2)
Main Prefixes
Title slug (identifier)
main-prefixes
Contenu
Corps
The International System of Units (SI) provides certain prefixes for multiples and submultiples of units of measurement. The symbol for the new units of measurement formed is then composed of two symbols: that of the multiple and that of the unit of measurement :
| Prefix | Power | Symbol |
| Pico | |10^{-12}= 0.000\ 000 000\ 001| | |\text{p}| |
| Nano | |10^{-9}= 0.000\ 000 001| | |\text{n}| |
| Micro | |10^{-6}= 0.000\ 001| | |\mu| |
| Milli | |10^{-3}= 0.001| | |\text{m}| |
| Centi | |10^{-2}= 0.01| | |\text{c}| |
| Deci | |10^{-1}= 0.1| | |\text{d}| |
| Unit | |10^{0}= 1| | - |
| Déca | |10^{1}= 10| | |\text{da}| |
| Hecto | |10^{2}= 100| | |\text{h}| |
| Kilo | |10^{3}= 1000| | |\text{k}| |
| Mega | |10^{6}= 1\ 000\ 000| | |\text{M}| |
| Giga | |10^{9}= 1\ 000\ 000\ 000| | |\text{G}| |
Content
Corps
- One kilometre (km) corresponds to 1 000 metres (m).
- One centilitre (cL) corresponds to 0.01 litre (L).
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