Part 4

Additional derived units of measurement

Current

Item	Quantity	Name	Symbol	Definition
4.1	mass	gram	g	10‑3 kg
4.2	length	micron	µm	10‑6 m
4.3	area	square metre	m2	base unit
4.4	area	square kilometre	km2	106 m2
4.5		square decimetre	dm2	10‑2 m2
4.6		square centimetre	cm2	10‑4 m2
4.7		square millimetre	mm2	10‑6 m2
4.8		square micrometre	µm2	10‑12 m2
4.9	volume	cubic kilometre	km3	109 m3
4.10		cubic metre	m3	base unit
4.11		cubic decimetre	dm3	10‑3 m3
4.12		cubic centimetre	cm3	10‑6 m3
4.13		cubic millimetre	mm3	10‑9 m3
4.14		hectolitre	hL or hl	10‑1 m3
4.15		millilitre	mL or ml	10‑6 m3
4.16	density	kilogram per cubic metre	kg/m3	base unit
4.17	velocity and speed	metre per second	m/s	base unit
4.18	acceleration	metre per second squared	m/s2	base unit
4.19	luminance	candela per square metre	cd/m2	base unit
4.20	absorbed dose, absorbed dose index, kerma, specific energy imparted	rad	rad	10‑2 Gy
4.21	activity of a radionuclide	curie	Ci	3.7 × 1010 Bq
4.22	dose equivalent	rem	rem	10‑2 Sv
4.23	exposure	roentgen	R	0.258 × 10‑3 C/kg
4.24	frequency	revolutions per minute	r/min	60 Hz
4.25		revolutions per second	r/s	1 Hz
4.26	apparent power	volt ampere	VA	V_rmsA_rms
4.27	reactive power	volt ampere reactive	var	V_rmsA_rmssinφ where φ radians is the phase angle between the electro‑motive force (emf) and the current
4.28	apparent energy	volt ampere hour	Vah	V_rmsA_rms h
4.29	reactive energy	volt ampere hour reactive	varh	V_rmsA_rms hsinφ where φ radians is the phase angle between the electro‑motive force (emf) and the current

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