104932
104932
friartikkel
2013-03-22T14:38:00.000Z
en

Explanation of symbols

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In older tables also these symbols may appear:

Data not yet available
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* Provisional or preliminary figure

Measures and weight

Length

m metre
mm millimetre = 0.001 m
cm centimetre = 0.01 m
km kilometre = 1 000 m
mil 10 kilometres = 10 000 m

Area

m 2 square metre
a are = 100 m 2
daa decare = 1 000 m 2
ha hectare = 1 0 000 m 2
km 2 square kilometre = 1 000 000 m 2

Volume

m 3 cubic metre
l, L litre = 0.001 m 3
hl, HL hectolitre = 0.1 m 3 = 100 l
barrel US measure of volume for petroleum = (US) 0.159 m 3 = 159 l

Mass (Weight)

kg kilogram
t ton = 1 000 kg
tkm measure of transport performance = t · km

Time

s second
min minute = 60 s
h hour = 60 min
d day = 24 h

Temperature

ºC degree Celsius

Electric current

A ampere

Energy/H4>

J joule, 1 J = 1 Ws
GJ gigajoule = 1 000 000 000 J
TJ terajoule = 1 000 000 000 000 J
PJ petajoule = 1 000 000 000 000 000 J
Ws watt second = 1 J
toe ton oil equivalent 42 622 000 000 J = ca. 42.6 GJ
kWh kilowatt hour = 3 600 000 J
MWh megawatt hour = 3 600 000 000 J
GWh gigawatt hour = 3 600 000 000 000 J
TWh terawatt hour = 3 600 000 000 000 000 J

Power

W watt 1 W =1 J/s = VA
kW kilowatt = 1 000 W
MW megawatt = 1 000 000 W
MVA megavolt ampere = 1 000 000 W

Units of measure of ships

GT Gross ton.
The gross tonnage of a ship indicates the volume of the whole ship including superstructure, deck and deck house.
NT Net ton.
The net tonnage indicates the size of cargo space.

Some prefixes

Prefix Symbol Factor  
exa E 10 18 =1 000 000 000 000 000 000
peta P 10 15 =1 000 000 000 000 000
tera T 10 12 =1 000 000 000 000
giga G 10 9 =1 000 000 000
mega M 10 6 =1 000 000
kilo k 10 3 =1 000
hekto h 10 2 =100
deka da 10 =10

Source: Norwegian Standards Association

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