zetta

Information about zetta

zetta- (symbol Z) is an SI prefix in the SI (system of units) denoting 10²¹ or 1 000 000 000 000 000 000 000.

Adopted in 1991, it comes from the Latin septem, meaning seven, because it is equal to 1000⁷.

A prefix of the same value, hepa-, was informally introduced a few years before the promulgation of zetta-. It was formed from the Greek ἑπτά, (hepta), also meaning seven. It never received official sanction and is now obsolete.

SI prefixes
1000ⁿ	10ⁿ	Prefix	Symbol	Short scale	Long scale	Decimal equivalent in SI writing style
1000⁸	10²⁴	yotta-	Y	Septillion	Quadrillion	1 000 000 000 000 000 000 000 000
1000⁷	10²¹	zetta-	Z	Sextillion	Trilliard (thousand trillion)	1 000 000 000 000 000 000 000
1000⁶	10¹⁸	exa-	E	Quintillion	Trillion	1 000 000 000 000 000 000
1000⁵	10¹⁵	peta-	P	Quadrillion	Billiard (thousand billion)	1 000 000 000 000 000
1000⁴	10¹²	tera-	T	Trillion	Billion	1 000 000 000 000
1000³	10⁹	giga-	G	Billion	Milliard (thousand million)	1 000 000 000
1000²	10⁶	mega-	M	Million		1 000 000
1000¹	10³	kilo-	k	Thousand		1 000
1000^2/3	10²	hecto-	h	Hundred		100
1000^1/3	10¹	deca-	da	Ten		10
1000⁰	10⁰	(none)	(none)	One		1
1000^−1/3	10⁻¹	deci-	d	Tenth		0.1
1000^−2/3	10⁻²	centi-	c	Hundredth		0.01
1000⁻¹	10⁻³	milli-	m	Thousandth		0.001
1000⁻²	10⁻⁶	micro-		Millionth		0.000 001
1000⁻³	10⁻⁹	nano-	n	Billionth	Milliardth	0.000 000 001
1000⁻⁴	10⁻¹²	pico-	p	Trillionth	Billionth	0.000 000 000 001
1000⁻⁵	10⁻¹⁵	femto-	f	Quadrillionth	Billiardth	0.000 000 000 000 001
1000⁻⁶	10⁻¹⁸	atto-	a	Quintillionth	Trillionth	0.000 000 000 000 000 001
1000⁻⁷	10⁻²¹	zepto-	z	Sextillionth	Trilliardth	0.000 000 000 000 000 000 001
1000⁻⁸	10⁻²⁴	yocto-	y	Septillionth	Quadrillionth	0.000 000 000 000 000 000 000 001

See also

External link

BIPM website

An SI prefix (also known as a metric prefix) is a name or associated symbol that precedes a unit of measure (or its symbol) to form a decimal multiple or submultiple.
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Si, si, or SI may refer to (all SI unless otherwise stated):

In language:

One of two Italian words:
sÃ¬ (accented) for "yes"
si

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common units, but have now been mostly replaced by the metric system in commercial, scientific, and industrial applications.

Contrarily, however, U.S. customary units are still the main system of measurement in the United States.
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This list compares various sizes of positive numbers, including counts of things, dimensionless numbers and probabilities.

Smaller than 10^-36

Computing: The number 510^-324

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19th century - 20th century - 21st century
1960s 1970s 1980s - 1990s - 2000s 2010s 2020s
1988 1989 1990 - 1991 - 1992 1993 1994

Year 1991 (MCMXCI
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Latin}}}
Official status
Official language of: Vatican City
Used for official purposes, but not spoken in everyday speech
Regulated by: Opus Fundatum Latinitas
Roman Catholic Church
Language codes
ISO 639-1: la
ISO 639-2: lat
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An SI prefix (also known as a metric prefix) is a name or associated symbol that precedes a unit of measure (or its symbol) to form a decimal multiple or submultiple.
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The long and short scales are two different numerical systems used throughout the world:

Short scale is the English translation of the French term Ã©chelle courte.

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The long and short scales are two different numerical systems used throughout the world:

Short scale is the English translation of the French term Ã©chelle courte.

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decimal (base ten or occasionally denary) numeral system has ten as its base. It is the most widely used numeral system, perhaps because humans have four fingers and a thumb on each hand, giving a total of ten digits over both hands.
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yotta- (symbol Y) is an SI prefix in the SI (system of units) denoting 10²⁴ or 1 000 000 000 000 000 000 000 000.

Adopted in 1991, it comes from the Greek ὀκτώ (oktÃ³), meaning
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Quadrillion may mean either of the two numbers (see long and short scales for more detail):

1,000,000,000,000,000 (one thousand million million; ; SI prefix peta) - increasingly common meaning in English language usage.

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exa- (symbol E) is a prefix in the SI system of units denoting 10¹⁸ or 1 000 000 000 000 000 000.

Adopted in 1991, it comes from the Greek ἕξ, meaning six (like hexa- ), because it is equal to 1000⁶.
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Trillion may mean:

Numbers

Either of the two numbers (see long and short scales for more detail):

1,000,000,000,000 (one million million; ; SI prefix tera) - increasingly common meaning in English language usage.

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peta- (symbol: P) is a prefix in the SI (system of units) denoting 10¹⁵, or 1 000 000 000 000 000. For example:

1 petametre = 10¹⁵ metres

1 petasecond = 10¹⁵ seconds
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Quadrillion may mean either of the two numbers (see long and short scales for more detail):

1,000,000,000,000,000 (one thousand million million; ; SI prefix peta) - increasingly common meaning in English language usage.

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Tera- (symbol: T) is a prefix in the SI system of units denoting 10¹², or 1,000,000,000,000 (1 million million).

Confirmed in 1960, it comes from the Greek τέρας, meaning monster.
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Trillion may mean:

Numbers

Either of the two numbers (see long and short scales for more detail):

1,000,000,000,000 (one million million; ; SI prefix tera) - increasingly common meaning in English language usage.

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Billion may mean:

Numbers

Either of two numbers (see long and short scales for more detail):

1,000,000,000 (one thousand million; ; SI prefix giga) - increasingly common meaning in English-language usage

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Giga- (symbol: G) is a prefix in the SI system of units denoting 10⁹, or 1,000,000,000 (1 billion). The Oxford English Dictionary reports the earliest written use of giga- in this sense to be in the Reports of the IUPAC 14th Conference in 1947: "The
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Billion may mean:

Numbers

Either of two numbers (see long and short scales for more detail):

1,000,000,000 (one thousand million; ; SI prefix giga) - increasingly common meaning in English-language usage

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Milliard is a French-derived word meaning the number 1,000,000,000 (10⁹; one thousand million; SI prefix giga). It is not used in American English and is rare in other forms of English - the preferred term being 'thousand million'.
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Mega- (symbol M) is an SI prefix in the SI system of units denoting a factor of 10⁶, 1,000,000 (one million).

For example, 1 MW (megawatt) = 1,000,000 watts = 1,000 kilowatts.
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million (1,000,000), or one thousand thousand, is the natural number following 999,999 and preceding 1,000,001.

In scientific notation, it is written as 10⁶^[1]
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Kilo- (symbol: k) is a prefix in the SI and other systems of units denoting 10³ or 1,000. For example:

one kilogram is 1,000 grams
one kilometre is 1,000 metres
one kilowatt is 1,000 watts
one kilojoule is 1,000 joules

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