Commonly used metric system units and symbols

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 (“weight”)*	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	m²
	hectare	ha	1 ha	=	10 000 m²
	square kilometer	km²	1 km²	=	100 ha
Volume	milliliter	mL	1000 mL	=	1 L
	cubic centimeter	cm³	1 cm³	=	1 mL
	liter	L	1000 L	=	1 m³
	cubic meter	m³
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/m³
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	kW·h	1 kW·h	=	3.6 MJ
Electric current	ampere	A