MEASUREMENT UNITS

 

Symbol	Unit	Equivalent to
'	minute (angle)	60 seconds
"	second (angle)	-----
%	percent	-----
‰	per thousand	-----
<	less than	-----
>	greater than	-----
°	degree (angle)	60 minutes = 3600 seconds
°C	centigrade or degree Celsius	-----
cc	cubic centimetre	1 ml
cm	centimetre	10 mm
cm2	square centimetre	100 mm2
cm3	cubic centimetre	1 ml
d	day	24 h = 1440 min = 86400 s
dd	degree-day	sum of daily avg. water temperature in centigrades
dh	degree-hour	sum of hourly avg. water temperature in centigrades
g	gram	-----
g/m3	gram per cubic metre	1 gram per 1 000 litres
Imp gallon	imperial gallon (UK)	4.546 litres
US gallon	US gallon (USA)	3.785 litres
h	hour	60 min = 3600 seconds
ha	hectare	10 000 m2
HP	horsepower	0.746 kW
in	inch	2.54 cm
kg	kilogram	1000 g
kg/ha	kilogram per hectare	1 g/10 m2
km	kilometre	1 000 m
km/h	kilometre per hour	0.278 m/s
km2	square kilometre	100 ha
kW	kilowatt	1.341 HP
kWh	kilowatt-hour	-----
l	litre	1 000 cm3
l/min	litre per minute	60 l/h = 1440 l/d
l/s	litre per second	60 l/min = 86400 l/d
µm	micrometre or micron	0.001 mm
m	metre	100 cm
m/s	metre per second	3.6 km/h
m2	square metre	-----
m3	cubic metre	1 000 l
m3/h	cubic metre per hour	-----
m3/s	cubic metre per second	-----
mg	milligram	0.001 g
mg/l	milligram per litre	-----
mil	thousandth of an inch	0.0254 mm = 25.4 µm
min	minute	60 seconds
ml	millilitre	0.001 l = 1 cm3
ml/l	millilitre per litre	-----
ml/m3	millilitre per cubic metre	1 ml per 1 000 litres
mm	millimetre	1 000 µm
mm2	square millimetre	-----
ppm	part per million	1 mg/l = 1 g/m3 = 1 ml/m3
Rtex	-----	weight (g) of 1 000 m of netting twine
s	second	-----
SBV	acid binding capacity unit	50 mg CaCO3 per litre
t	metric tonne	1 000 kg
t/ha	tonne per hectare	100 g/ m2 = 10 kg/100 m2
tbs	tablespoon	from 15 to 20 ml
tex	-----	weight (g) of 1 000 m of yarn
ts	teaspoon	about 5 ml