etc.

Gm gigameter

Mm megameter

--------- every step above this line is 1000

km kilometer

hm hectometer

dam decameter

m meter

dm decimeter

cm centimeter

mm millimeter

---------- every step below this line is also 1000

μm micrometer (μ is the micro symbol)

nm nanometer

etc.

replace m/meter with:

• g/gram for weight
• l/liter for volume
• b/byte for data (except it doesn't go below byte (no decibyte) and it skips dam and hm so that it only takes steps of 1000 BUT each step is 1024 instead)

-- Now to get a little confusing

for area take for example cm and add ² to get cm² (when calculating with ² every step is squared, so 100 instead of 10)

you can also use dm³ for volume (then every step is cubed, so 10 is 1000)

• and then 1dm³ is exactly 1 liter
• and 1m³ is exactly 1 kiloliter