Explanation of symbols
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Updated:
| . | Category not applicable Figures do not exist at this time, because the category was not in use when the figures were collected. |
| .. | Not available Figures have not been entered into our databases or are too unreliable to be published. |
| : | Confidential Figures are not published so as to avoid identifying persons or companies. |
In older tables also these symbols may appear:
| … | Data not yet available |
| - | Nil |
| * | 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
Contact
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Statistics Norway's Information Centre