milli-
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Wiktionary, the free dictionary.
Milli redirects here. See Millie for similar-sounding words
milli- (symbol m) is a prefix in the SI and other systems of units denoting a factor of 10−3, or 1/1,000.
Adopted in 1795, the prefix comes from the Latin mille, meaning one thousand (the plural is milia).
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 | |
10002/3 | 102 | hecto- | h | Hundred | 100 | |
10001/3 | 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- | µ | 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 |