# Arithmetic/Geometry » Converting units

Check Imperial and US units for converting other units.

For prefixes bigger than kilo and smaller than milli, check the bottom of this page.

## Distance / Length

 Every step: :10   or: decimal dot 1 place to the left Every step: ×10   or: decimal dot 1 place to the right km hm dam m dm cm mm

## Area

 Every step: :100   or: decimal dot 2 place to the left Every step: ×100   or: decimal dot 2 place to the right km2 hm2 dam2 m2 dm2 cm2 mm2 hectare(ha) are(a)

## Volume (m3)

 Every step: :1000   or: decimal dot 3 place to the left Every step: ×1000   or: decimal dot 3 place to the right km3 hm3 dam3 m3 dm3 cm3 mm3 kilolitres(kl or kL) litres(l or L) millilitres(ml or mL)

## Volume (litres)

 Every step: :10   or: decimal dot 1 place to the left Every step: ×10   or: decimal dot 1 place to the right kL hL daL L dL cL mL m3 dm3 cm3

## Weight

 Every step: :10   or: decimal dot 1 place to the left Every step: ×10   or: decimal dot 1 place to the right kg hg dag g dg cg mg (Dutch)ounce

## Other prefixes

Kilo to milli are not the only prefixes you can use. There are other SI-prefixes or metric prefixes. In the table below you can find them from 1024 to 10–24.

SI stands for 'Système international d'unités' which you can probably guess the English translation for.

 Symbol Name Decimal Y yotta 1024 = 1 000 000 000 000 000 000 000 000 Z zetta 1021 = 1 000 000 000 000 000 000 000 E exa 1018 = 1 000 000 000 000 000 000 P peta 1015 = 1 000 000 000 000 000 T tera 1012 = 1 000 000 000 000 G giga 109 = 1 000 000 000 M mega 106 = 1 000 000 k kilo 103 = 1000 h hecto 102 = 100 da deca 101 = 10 100 = 1 d deci 10–1 = 0.1 c centi 10–2 = 0.01 m milli 10–3 = 0.001 µ micro 10–6 = 0.000 001 n nano 10–9 = 0.000 000 001 p pico 10–12 = 0.000 000 000 001 f femto 10–15 = 0.000 000 000 000 001 a atto 10–18 = 0.000 000 000 000 000 001 z zepto 10–21 = 0.000 000 000 000 000 000 001 y yocto 10–24 = 0.000 000 000 000 000 000 000 001

Watch out!
If you write a m while you meant a M, you are wrong by a factor 109.
The biggest two are the capital Y and Z and the smallest two are the lower case y and z. If you write a Y while you meant a y, you are wrong by a factor 1048!

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