metric prefix
Giga or nano
A metric prefix is a unit prefix indicating a multiple or fraction of a base unit in the International System of Units.
Prefixes like kilo-, mega-, and giga- multiply by powers of ten; milli-, micro-, and nano- divide.
A kilometer is a thousand meters; a millimeter is a thousandth.
These prefixes extend informally beyond strict scientific use: a megadose of vitamins, nanoseconds of hesitation.
- kiloThousand-unit prefix
- megaMillion-fold prefix
- picoTrillionth-scale metric prefix
- millionthOne part per million
- nanoMetric prefix for billionth
SI units · small scale · decimal system · base ten · order of magnitude · multiplier · unit conversion · units · giga · large scale · powers of ten · scientific notation · centi · milli · peta · micro · ten · hecto