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Glossary
ID NO.
Scale
 

Quantity measured

 

Unit

 

Symbol

 

Relationship

Length, width,
distance, thickness,
girth, etc.
millimeter mm 10 mm = 1 cm
centimeter cm 100 cm = 1 m
meter m      
kilometer km 1 km = 1000 m
Mass
milligram mg 1000 mg = 1 g
gram g      
kilogram kg 1 kg = 1000 g
metric ton t 1 t = 1000 kg
Time second s      
Temperature degree Celsius C      
Area square meter m      
hectare ha 1 ha = 10 000 m
square kilometer km 1 km = 100 ha
Volume milliliter mL 1000 mL = 1 L
cubic centimeter cm 1 cm = 1 mL
liter L 1000 L = 1 m
cubic meter m      
Speed, velocity meter per second m/s      
kilometer per hour km/h 1 km/h = 0.278 m/s
Density kilogram per cubic meter kg/m      
Force newton N      
Pressure, stress kilopascal kPa      
Power watt W      
kilowatt kW 1 kW = 1000 W
Energy kilojoule kJ      
megajoule MJ 1 MJ = 1000 kJ
kilowatt hour kWh 1 kWh = 3.6 MJ
Electric current ampere A

 

 

 

 

1 square centimetre =       0.1550 square inches  
1 square metre        =       1.1960 square yards    
1 hectare                 =       2.4711 acres    
1 square kilometre  =       0.3861 square miles      
1 square inch        =    6.4516 square centimetres
1 square foot        =    0.0929 square metres
1 square yard       =    0.8361 square metres
1 acre                   =    4046.9 square metres
1 square mile        =    2.59 square kilometres

 
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