Hecto

From Wikipedia, the free encyclopedia.

Hecto (symbol h) is a SI prefix in the SI system of units denoting a factor of 10² (100).

Adopted in 1795, it comes from the Greek έκατόν, meaning hundred.

For example:

SI prefixes
10ⁿ	Prefix	Symbol	Short scale	Long scale Name	Decimal Equivalent
10²⁴	yotta	Y	Septillion	Quadrillion	1 000 000 000 000 000 000 000 000
10²¹	zetta	Z	Sextillion	Trilliard (thousand trillion)	1 000 000 000 000 000 000 000
10¹⁸	exa	E	Quintillion	Trillion	1 000 000 000 000 000 000
10¹⁵	peta	P	Quadrillion	Billiard (thousand billion)	1 000 000 000 000 000
10¹²	tera	T	Trillion	Billion	1 000 000 000 000
10⁹	giga	G	Billion	Milliard (thousand million)	1 000 000 000
10⁶	mega	M	Million		1 000 000
10³	kilo	k	Thousand		1 000
10²	hecto	h	Hundred		100
10¹	deca, deka	da	Ten		10
10⁻¹	deci	d	Tenth		0.1
10⁻²	centi	c	Hundredth		0.01
10⁻³	milli	m	Thousandth		0.001
10⁻⁶	micro	µ	Millionth		0.000 001
10⁻⁹	nano	n	Billionth	Milliardth	0.000 000 001
10⁻¹²	pico	p	Trillionth	Billionth	0.000 000 000 001
10⁻¹⁵	femto	f	Quadrillionth	Billiardth	0.000 000 000 000 001
10⁻¹⁸	atto	a	Quintillionth	Trillionth	0.000 000 000 000 000 001
10⁻²¹	zepto	z	Sextillionth	Trilliardth	0.000 000 000 000 000 000 001
10⁻²⁴	yocto	y	Septillionth	Quadrillionth	0.000 000 000 000 000 000 000 001
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See also