Units & Sizes

Last updated on 29 Aug 2019 09:29 (cf. Authors)

Multiplication factors, abbreviations, prefixes and symbols

Multiplication factor Abbreviation Prefix Symbol
1,000,000,000,000,000 1015 peta P
1,000,000,000,000 1012 tera T
1,000,000,000 109 giga G
1,000,000 106 mega M
1,000 103 kilo k
100 102 hecto h
0.1 10-1 deci d
0.01 10-2 centi c
0.001 10-3 milli m
0.000,001 10-6 micro μ

Units and abbreviations

Abbreviation Unit
°C degrees Celsius
a year
cal calorie
g gram
h hour
ha hectare
J joule
m2 square metre
m3 cubic metre
ppm parts per million
ppb parts per billion
t tonne
W watt

Standard conversions

Unit is equivalent to
1 tonne (t) 1,000 kilograms 1 megagram (Mg)
1 kilotonne (kt) 1,000 tonnes 1 gigagram (Gg)
1 megatonne (Mt) 1,000,000 tonnes 1 teragram (Tg)
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