Шаблон:Convert/list of units

The table below lists units supported by {{convert}}. More complete lists are linked for each dimension. For a complete list of all dimensions, see full list of units.

{{Convert}} uses unit-codes, which are similar to, but not necessarily exactly the same as, the usual written abbreviation for a given unit. These unit-codes are displayed in column 3 of the following tables. These are accepted as input by {{convert}} as the second and third unnamed parameters:

• {{convert|100|kg|lb}} → 100 kg (220 lb)
• {{convert|100|lb|kg}} → 100 lb (45 kg)

The unit-codes should be treated as case-sensitive:

• {{convert|100|Mm|mm}} → 100 Mm (1,0×10¹¹ mm)

The output of {{convert}} can display multiple converted units, if further unit-codes are specified after the second unnamed parameter (without the pipe separator). Typical combination output units are listed below in column 7.

• {{convert|55|nmi|km mi}} → 55 nmi (102 km; 63 mi)
• {{convert|1|oz|ozt g gr}} → 1 oz (0,91 ozt; 28 g; 440 gr)

Some units have alternative unit-codes. These are shown in brackets in column 3, e.g. °F (F). Either may be entered for Fahrenheit (but not a lower-case f).

Abridged list of supported units
Explanation
system	unit	unit- code	symbol or abbrev.	notes	sample default conversion	combination output units
the system(s) to which the unit belongs	units listed by name	unit-code to use in template	symbols shown in output	other notes about the units	sample of the default conversion for the unit	output codes for multiple conversions
AREA (Full list)
system	unit	unit- code	abbrev- iation	notes	sample default conversion	combination output units
SI	km2	km2	km2	US spelling: square kilometer	10 km2 (3,9 sq mi)	km2 sqmi
	m2	m2	m2	US spelling: square meter	10 m2 (110 sq ft)	m2 sqft
	cm2	cm2	cm2	US spelling: square centimeter	10 cm2 (1,6 sq in)	cm2 sqin
	mm2	mm2	mm2	US spelling: square millimeter	10 mm2 (0,016 sq in)	mm2 sqin
non-SI metric	ha	ha	ha		10 ha (25 acres)
Imperial & US customary	sq mi	sqmi	sq mi		10 sq mi (26 km2)	sqmi km2
	acre	acre	(none)		10 acres (4,0 ha)
	sq yd	sqyd	sq yd		10 sq yd (8,4 m2)
	sq ft	sqft (sqfoot)	sq ft	long code "sqfoot" outputs square foot (and never feet)	10 sq ft (0,93 m2)	sqft m2 (sqfoot m2)
	sq in	sqin	sq in		10 sq in (65 cm2)	sqin cm2
Other	sq nmi	sqnmi	sq nmi		10 sq nmi (34 km2; 13 sq mi)
	dunam	dunam	(none)	For alternative spellings and definitions see the full list	10 dunams (0,010 km2; 0,0039 sq mi)
	tsubo	tsubo	(none)		10 tsubo (33 m2)
DENSITY (Full list)
system	unit	unit- code	abbrev- iation	notes	sample default conversion	combination output units
Metric	kg/m3	kg/m3	kg/m3		10 kg/m3 (17 lb/cu yd)	kg/m3 lb/ft3 (kg/m3 lb/cuft) kg/m3 lb/yd3 (kg/m3 lb/cuyd)
	g/m3	g/m3	g/m3		10 g/m3 (0,017 lb/cu yd)	g/m3 kg/m3 g/m3 lb/ft3 (g/cm3 lb/cuft) g/m3 lb/yd3 (g/cm3 lb/cuyd)
Imperial & US customary	lb/cu ft	lb/ft3	lb/cu ft		10 lb/cu ft (0,16 g/cm3)	lb/ft3 kg/m3 (lb/cu ft g/m3) lb/ft3 g/m3 (lb/cu ft g/m3)
	lb/cu yd	lb/yd3	lb/cu yd		10 lb/cu yd (5,9 kg/m3)	lb/yd3 kg/m3 (lb/cuyd kg/m3) lb/yd3 g/m3 (lb/cuyd g/m3)
ENERGY (Full list)
system	unit	unit- code	abbrev- iation	notes	sample default conversion	combination output units
SI	GJ	GJ	GJ		10 GJ (2.800 kWh)
	MJ	MJ	MJ		10 MJ (2,8 kWh)
	kJ	kJ	kJ		10 kJ (2.400 cal)
	hJ	hJ	hJ		10 hJ (240 cal)
	daJ	daJ	daJ		10 daJ (24 cal)
	J	J	J		10 J (2,4 cal)
	dJ	dJ	dJ		10 dJ (0,24 cal)
	cJ	cJ	cJ		10 cJ (0,024 cal)
	mJ	mJ	mJ		10 mJ (0,0024 cal)
	µJ	µJ (uJ)	µJ		10 µJ (2,4×10−6 cal)
	nJ	nJ	nJ		10 nJ (2,4×10−9 cal)
cgs	Merg	Merg	Merg		10 Merg (1,0 J)
	kerg	kerg	kerg		10 kerg (1,0 mJ)
	erg	erg	(none)		10 erg (1,0 µJ)
Watt-hour multiples	TWh	TWh	TWh		10 TWh (36 PJ)
		TW.h	TW⋅h
	GWh	GWh	GWh		10 GWh (36 TJ)
		GW.h	GW⋅h
	MWh	MWh	MWh		10 MWh (36 GJ)
		MW.h	MW⋅h
	kWh	kWh	kWh		10 kWh (36 MJ)
		kW.h	kW⋅h
	Wh	Wh	Wh		10 Wh (36 kJ)
		W.h	W⋅h
Electron- volt multiples
	GeV	GeV	GeV		10 GeV (1,6 nJ)
	MeV	MeV	MeV		10 MeV (1,6 pJ)
	keV	keV	keV		10 keV (1,6 fJ)
	eV	eV	eV		10 eV (1,6 aJ)
	meV	meV	meV		10 meV (1,6 zJ)
Calorie multiples	Cal	Cal	Cal	The thermo-chemical calorie is the default definition. For others, see the full list.	10 Cal (42 kJ)
	Mcal	Mcal	Mcal		10 Mcal (42 MJ)
	kcal	kcal	kcal		10 kcal (42 kJ)
	cal	cal	cal		10 cal (42 J)
	mcal	mcal	mcal		10 mcal (42 mJ)
pound/ ounce-foot/ inch-hour-minute-second	ft⋅pdl	ftpdl	ft⋅pdl		10 ft⋅pdl (0,42 J)
	ft⋅lbf	ftlbf	ft⋅lbf		10 ft⋅lbf (14 J)
		ftlb-f	ft⋅lbf
	in⋅lbf	inlbf	in⋅lbf		10 in⋅lbf (1.100 mJ)
		inlb-f	in⋅lbf
	in⋅ozf	inozf	in⋅ozf		10 in⋅ozf (71 mJ)
		inoz-f	in⋅ozf
	hp⋅h	hph	hp⋅h		10 hp⋅h (7,5 kWh)
British thermal unit	Btu	Btu	Btu	The International Steam Table British thermal unit is used. For others, see the full list.	10 Btu (11 kJ)
		BTU	BTU
TNT-based units	gigatonne of TNT	GtTNT	(none)		10 gigatonnes of TNT (42 EJ)
	gigaton of TNT	GtonTNT	(none)
	megatonne of TNT	MtTNT	(none)		10 megatonnes of TNT (42 PJ)
	Mt	MtonTNT	Mt
	kilotonne of TNT	ktTNT	(none)		10 kilotonnes of TNT (42 TJ)
	kt	ktonTNT	kt
	tonne of TNT	tTNT	(none)		10 tonnes of TNT (42 GJ)
	ton of TNT	tonTNT	(none)
Other
	Eh	Eh	Eh		10 Eh (270 eV)
	Ry	Ry	Ry		10 Ry (140 eV)
	toe	toe	toe		10 toe (420 GJ)
	BOE	BOE	BOE		10 BOE (61 GJ)
	cubic foot of natural gas	cuftnaturalgas (cufootnaturalgas)		Unit-code cufootnaturalgas will show "cubic foot of natural gas" if plural.	10 cubic feet of natural gas (11 MJ)
	l⋅atm	latm	l⋅atm		10 l⋅atm (1.000 J)
		Latm	L⋅atm
	imp gal⋅atm	impgalatm	imp gal⋅atm		10 imp gal⋅atm (4.600 J)
	US gal⋅atm	USgalatm (usgalatm)	US gal⋅atm		10 US gal⋅atm (3.800 J)
		U.S.galatm (usgalatm)	U.S. gal⋅atm
FORCE (Full list)
system	unit	unit- code	abbrev- iation	notes	sample default conversion	combination output units
SI	GN	GN	GN	Allows triple output units. See: full list.	10 GN (2,2×109 lbf)	GN LT-f GN LTf GN ST-f GN STf
	MN	MN	MN	Allows triple output units. See: full list.	10 MN (2.200.000 lbf)	MN LT-f MN LTf MN ST-f MN STf
	kN	kN	kN	Allows triple output units. See: full list.	10 kN (2.200 lbf)	kN LT-f kN LTf kN ST-f kN STf
	N	N	N		10 N (2,2 lbf)	N lb-f N lbf N oz-f N ozf
	mN	mN	mN		10 mN (0,036 ozf)	mN oz-f mN ozf mN gr-f mN grf
	µN	µN (uN)	µN		10 µN (2,2×10−6 lbf)	µN gr-f µN grf
	nN	nN	nN		10 nN (1,6×10−5 grf)	nN gr-f nN grf
cgs	Mdyn	Mdyn	Mdyn		10 Mdyn (22 lbf)
	kdyn	kdyn	kdyn		10 kdyn (0,36 ozf)
	dyn	dyn (dyne)	dyn		10 dyn (0,16 grf)
	mdyn	mdyn	mdyn		10 mdyn (0,00016 grf)
Metric gravitational units	tf	t-f	tf		10 tf (98 kN; 9,8 LTf; 11 STf)
		tf	tf
	kgf	kg-f	kgf		10 kgf (98 N; 22 lbf)
		kgf	kgf
	gf	g-f	gf		10 gf (98 mN; 0,35 ozf)
		gf	gf
	mgf	mg-f	mgf		10 mgf (98 µN; 0,15 grf)
		mgf	mgf
Avoirdupois-based units	pdl	pdl	pdl		10 pdl (1,4 N)
	LTf	LT-f	LTf		10 LTf (100 kN)	LT-f ST-f
		LTf	long ton-force			LTf STf
	STf	ST-f	STf		10 STf (89 kN)	ST-f LT-f
		STf	short ton-force			STf LTf
	lbf	lb-f	lbf		10 lbf (44 N)
		lbf	lbf
	grf	gr-f	grf		10 grf (6.400 µN)
		grf	grf
LENGTH (Full list)
system	unit	unit- code	abbrev- iation	notes	sample default conversion	combination output units
SI	Mm	Mm	Mm	US spelling: megameter	10 Mm (6.200 mi)
	km	km	km	US spelling: kilometer	10 km (6,2 mi)	km mi
	m	m	m	US spelling: meter	10 m (33 ft)	m ft m ftin
	cm	cm	cm	US spelling: centimeter	10 cm (3,9 in)	cm in
	mm	mm	mm	US spelling: millimeter	10 mm (0,39 in)	mm in
	µm	µm (um)	µm	US spelling: micrometer	10 µm (3,3×10−5 ft)
	nm	nm	nm	US spelling: nanometer	10 nm (3,9×10−7 in)
non-SI metric	Å	Å (angstrom)	Å		10 Å (3,9×10−8 in)
Imperial & US customary	mi	mi	mi		10 mi (16 km)	mi km
	furlong	furlong	(none)		10 furlongs (6.600 ft; 2.000 m)
	chain	chain	(none)		10 chains (660 ft; 200 m)
	rd	rd	rd	For other names of this unit see the full list.	10 rd (160 ft; 50 m)
	fathom	fathom	(none)	fathom ≡ 6 ft	10 fathoms (60 ft; 18 m)
	yd	yd	yd	assumes the international definition	10 yd (9,1 m)
	ft	ft (foot)	ft	long code "foot" outputs foot (and never feet)	10 ft (3,0 m)	ftin (feet and inches) ft m (foot m)
	in	in	in		10 in (250 mm)	in cm in mm
Other	nmi	nmi	nmi	the international standard nautical mile For other nautical miles see the full list.	10 nmi (19 km; 12 mi)
	pc	pc	pc		10 pc (33 ly)
	ly	ly	ly		10 ly (630.000 AU)
	AU	AU	AU		10 AU (1,5×109 km; 930.000.000 mi)
MASS (Full list)
system	unit	unit- code	abbrev- iation	notes	sample default conversion	combination output units
SI	kg	kg	kg	Allows triple output units. See: full list.	10 kg (22 lb)	kg lb kg st
	g	g	g		10 g (0,35 oz)	g oz
	mg	mg	mg		10 mg (0,15 gr)	mg gr
	µg	µg (ug)	µg		10 µg (3,5×10−7 oz)
non-SI metric	t	t	t	Allows triple output units. See: full list.	10 t (9,8 long tons; 11 short tons)	t LT t ST
	t	MT	t			MT LT MT ST
Avoirdupois	long ton	LT	(none)	2,240 lb used mostly in the British Commonwealth. Allows triple output units. See: full list.	10 long tons (10 t)	LT t LT MT LT ST
		long ton	long ton
	short ton	ST	(none)	2,000 lb used mostly in the US. Allows triple output units. See: full list.	10 short tons (9,1 t)	ST t ST MT ST LT
		short ton	short ton
	st	st	st	14 lb used mostly in the British Commonwealth except Canada. Allows triple output units. See: full list.	10 st (140 lb; 64 kg)	st kg st lb
	lb	lb	lb	Allows triple output units. See: full list.	10 lb (4,5 kg)	lb kg lb st
	oz	oz	oz		10 oz (280 g)	oz g
	drachm	drachm	(none)		10 drachms (18 g)
	drachm	dram	(none)
	gr	gr	gr	equivalent to the troy grain	10 gr (0,65 g)
Troy	ozt	ozt	ozt		10 ozt (11 oz; 310 g)
other	carat	carat	(none)		10 carats (2,0 g)
SPEED (Full list)
system	unit	unit- code	abbrev- iation	notes	sample default conversion	combination output units
SI	m/s	m/s	m/s	US spelling: meter per second	10 m/s (33 ft/s)	m/s ft/s (m/s foot/s)
non-SI metric	km/h	km/h	km/h	US spelling: kilometer per hour	10 km/h (6,2 mph)	km/h mph
Imperial & US customary	mph	mph	mph		10 mph (16 km/h)	mph km/h mph kn
	ft/s	ft/s (foot/s)	ft/s	long code "foot/s" outputs foot per second (and never feet)	10 ft/s (3,0 m/s)	ft/s m/s
Maritime units	kn	kn (knot)	kn		10 kn (19 km/h; 12 mph)	kn mph
TEMPERATURE (Full list)
system	unit	unit- code	abbrev- iation	notes	sample default conversion	combination output units
SI	K	K	K	Allows triple output units. See: full list.	10 K (−263,1 °C; −441,7 °F)	K °C (K C) K °R (K R) K °F (K F)
	°C	°C (C)	°C		10 °C (50 °F)	°C K (C K) °C °R (C R) °C °F (C F)
Imperial & US customary	°R	°R (R)	°R		10 °R (5,56 K; −449,67 °F; −267,59 °C)	°R K (R K) °R °C (R C) °R °F (R F)
	°F	°F (F)	°F		10 °F (−12 °C)	°F K (F K) °F °C (F C) °F °R (F R)
	Celsius change	C-change		Used for temperature intervals instead of actual temperatures Example:  {{convert|5|C-change|0}} warmer Result: 5 °C (9 °F) warmer
	Fahrenheit change	F-change		Used for temperature intervals instead of actual temperatures Example:  {{convert|10|F-change|0}} colder Result: 10 °F (6 °C) colder
TORQUE (Full list)
system	unit	unit- code	abbrev- iation	notes	sample default conversion	combination output units
Industrial
SI	N⋅m	Nm	N⋅m	Triple combinations are also possible. See the full list.	10 N⋅m (7,4 lbf⋅ft)	Nm kg.m Nm lb.ft
Non-SI metric	kg⋅m	kg.m	kg⋅m		10 kg⋅m (98 N⋅m; 72 lb⋅ft)	kg.m Nm kg.m lb.ft
Imperial & US customary	lb⋅ft	lb.ft	lb⋅ft		10 lb⋅ft (14 N⋅m)	lb.ft Nm lb.ft kg-m
Scientific
SI	N⋅m	N.m	N⋅m	Triple combinations are also possible. See the full list.	10 N⋅m (7,4 lbf⋅ft)	N.m kgf.m N.m lbf.ft
Non-SI metric	kgf⋅m	kgf.m	kgf⋅m		10 kgf⋅m (98 N⋅m; 72 lbf⋅ft)	kgf.m N.m kgf.m lbf.ft
Imperial & US customary	lbf⋅ft	lbf.ft	lbf⋅ft		10 lbf⋅ft (14 N⋅m)	lbf.ft N.m lbf.ft kgf.m
VOLUME (Full list)
system	unit	unit- code	abbrev- iation	notes	sample default conversion	combination output units
SI	m3	m3	m3	US spelling: cubic meter one kilolitre	10 m3 (350 cu ft)
	cm3	cm3	cm3	US spelling: cubic centimeter one millilitre	10 cm3 (0,61 cu in)
		cc	cc
	mm3	mm3	mm3	US spelling: cubic millimeter	10 mm3 (0,00061 cu in)
non-SI metric	kl	kl	kl	US spelling: kiloliter one cubic metre	10 kl (350 cu ft)
		kL	kL
	l	l	l	US spelling: liter one cubic decimetre Allows triple output units. See: full list.	10 l (2,2 imp gal; 2,6 US gal)	l impgal l USgal l U.S.gal l USdrygal l U.S.drygal
		L	L			L impgal L impqt L USgal L U.S.gal L USdrygal L U.S.drygal
	cl	cl	cl	US spelling: centiliter	10 cl (3,5 imp fl oz; 3,4 US fl oz)
		cL	cL
	ml	ml	ml	US spelling: milliliter one cubic centimetre	10 ml (0,35 imp fl oz; 0,34 US fl oz)	ml impoz ml USoz ml U.S.oz
		mL	mL			mL impoz mL USoz mL U.S.oz
Imperial & US customary	cu yd	cuyd	cu yd		10 cu yd (7,6 m3)
	cu ft	cuft (cufoot)	cu ft	long code "cufoot" outputs cubic foot (and never feet)	10 cu ft (0,28 m3)
	cu in	cuin	cu in		10 cu in (160 cm3)
Imperial	imp bbl	impbbl	imp bbl	36 imp gal	10 imp bbl (1.600 l; 360 imp gal; 430 US gal)
	imp bsh	impbsh	imp bsh	8 imp gal	10 imp bsh (360 l; 80 imp gal; 83 US dry gal)
		impbu	imp bu
	imp gal	impgal	imp gal	4.54609 litres by definition, also 4 imp qt or 8 imp pt or 160 imp fl oz Allows triple output units. See: full list.	10 imp gal (45 l; 12 US gal)	impgal l impgal L impgal USgal impgal U.S.gal impgal USdrygal impgal U.S.drygal
	imp qt	impqt	imp qt	1/4 imp gal or 40 imp fl oz	10 imp qt (11.000 ml; 380 US fl oz)
	imp pt	imppt	imp pt	1/8 imp gal or 20 imp fl oz	10 imp pt (5,7 l)
	imp fl oz	impoz (impfloz)	imp fl oz	1/160 imp gal	10 imp fl oz (280 ml; 9,6 US fl oz)	impoz USoz impoz U.S.oz impoz ml impoz mL
US customary liquid measure	US bbl	USbbl	US bbl	31½ US gal used for liquids except for oil and beer (see the full list)	10 US bbl (1.200 l; 310 US gal; 260 imp gal)
		U.S.bbl	U.S. bbl
	bbl	oilbbl	bbl	42 US gal	10 bbl (1,6 m3)
	US bbl	USbeerbbl (usbeerbbl)	US bbl		10 US bbl (1.200 l; 310 US gal; 260 imp gal)
		U.S.beerbbl (usbeerbbl)	U.S. bbl
	US gal	USgal	US gal	231 cubic inches by definition, also 4 US qt or 8 US pt or 128 US fl oz Allows triple output units. See: full list.	10 US gal (38 l; 8,3 imp gal)	USgal l USgal L USgal impgal
		U.S.gal	U.S. gal			USgal l USgal L USgal impgal
	US qt	USqt	US qt	1/4 US gal or 32 US fl oz	10 US qt (9.500 ml)
		U.S.qt	U.S. qt
	US pt	USpt	US pt	1/8 US gal or 16 US fl oz	10 US pt (4,7 l; 8,3 imp pt)
		U.S.pt	U.S. pt
	US fl oz	USoz (USfloz)	US fl oz	1/128 US gal	10 US fl oz (300 ml)	USoz ml USoz mL USoz impoz
		U.S.oz (U.S.floz)	U.S. fl oz			U.S.oz ml U.S.oz mL U.S.oz impoz
US customary dry measure	US dry bbl	USdrybbl	US dry bbl	105/32 US bsh	10 US dry bbl (1,2 m3)
		U.S.drybbl	U.S. dry bbl
	US bsh	USbsh	US bsh	2150.42 cubic inches by definition	10 US bsh (350 l; 80 US dry gal; 78 imp gal)
		U.S.bsh	U.S. bsh
	US bu	USbu	US bu	2150.42 cubic inches by definition	10 US bu (350 l; 80 US dry gal; 78 imp gal)
		U.S.bu	U.S. bu
	US dry gal	USdrygal	US dry gal	1/8 US bsh Allows triple output units. See: full list.	10 US dry gal (44 l)	USdrygal l USdrygal L USdrygal impgal
		U.S.drygal	U.S. dry gal			U.S.drygal l U.S.drygal L U.S.drygal impgal
	US dry qt	USdryqt	US dry qt	1/32 US bsh	10 US dry qt (11.000 ml)
		U.S.dryqt	U.S. dry qt
	US dry pt	USdrypt	US dry pt	1/32 US bsh	10 US dry pt (5.500 ml)
		U.S.drypt	U.S. dry pt
PRESSURE
	unit	unit- code	abbrev- iation		sample default conversion
	GPa	GPa	GPa		10 GPa (1.500.000 psi)
	MPa	MPa	MPa		10 MPa (1.500 psi)
	kPa	kPa	kPa		10 kPa (1,5 psi)
	hPa	hPa	hPa		10 hPa (0,15 psi)
	Pa	Pa	Pa		10 Pa (0,0015 psi)
	mPa	mPa	mPa		10 mPa (1,5×10−6 psi)
	mbar	mbar	mbar		10 mbar (10 hPa)
		mb	mb
	dbar	dbar	dbar		10 dbar (100 kPa)
	bar	bar	(none)		10 bar (1.000 kPa)
	kBa	kBa	kBa		10 kBa (10 hPa)
	Ba	Ba	Ba		10 Ba (1,0 Pa)
	atm	atm	atm		10 atm (1.000 kPa)
	Torr	Torr	Torr		10 Torr (1,3 kPa)
	mmHg	mmHg	mmHg		10 mmHg (1,3 kPa)
	inHg	inHg	inHg		10 inHg (34 kPa)
	psi	psi	psi		10 psi (69 kPa)
FUEL EFFICIENCY
	unit	unit- code		notes		combinations
	kilometres per litre	km/l (km/L)		Use km/L to get "km/L"		km/l mpgimp km/l mpgus
	litres per 100 kilometres	l/100 km (L/100 km)		Use L/100 km to get "L/100 km"		l/100 km mpgimp l/100 km mpgus
	litres per kilometre	l/km (L/km)		Use L/km to get "L/km"		l/km impgal/mi l/km usgal/mi
	miles per imperial gallon	mpgimp				mpgimp mpgus
	miles per US gallon	mpgus (mpgUS, mpgU.S.)		Use mpgUS to get "US" Use mpgU.S. to get "U.S." mpgus will give "U.S." if spelling is set to US & "US" otherwise		mpgus mpgimp
	imperial gallons per mile	impgal/mi				impgal/mi
	US gallons per mile	usgal/mi (USgal/mi, U.S.gal/mi)		As above with the us vs US vs U.S.		usgal/mi
The mpgUS, mpgU.S., USgal/mi vs U.S.gal/mi, km/L, L/100 km and L/km variants work within combinations also (making 36 combinations in total).
POWER
Watts, kilowatts, milliwatts, etc. are supported. As is horsepower (English & metric). Use standard abbreviations as input code (lowercase hp for horsepower, for example)
POPULATION DENSITY
	unit	unit- code		notes		combinations
	inhabitants per square kilometre	PD/sqkm		PD stands for population density, i.e. humans (inhabitants)		PD/sqkm PD/sqmi
	per square kilometre	/sqkm		Used when the word 'inhabitants' would be inappropriate.		/sqkm /sqmi
	inhabitants per hectare	PD/ha				PD/ha PD/acre
	per hectare	/ha				/ha /acre
	inhabitants per square mile	PD/sqmi		PD stands for population density, i.e. humans (inhabitants)		PD/sqmi PD/sqkm
	per square mile	/sqmi		Used when the word 'inhabitants' would be inappropriate.		/sqmi /sqkm
	inhabitants per acre	PD/acre				PD/acre PD/ha
	per acre	/acre				/acre /ha
COST PER UNIT MASS
	unit	unit- code		notes		combinations
	dollars per pound	$/lb		"$" can mean US$, HK$, etc.		(none)
	dollars per kilogram	$/kg				(none)
	dollars per troy ounce	$/ozt		12 troy ounces in 1 troy pound		(none)