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Milli (m) Unit Definition
Milli is a SI unit prefix in the metric system denoting a factor of one thousandth (10−3). It is represented by the prefix milli or the symbol m.
Overview
Proposed in 1793 and adopted in 1795, the prefix comes from the Latin term mille, meaning one thousand (the Latin plural is milia).
Examples
1 liter (L) = 1000 milliliters (ml)
1 gram (g) = 1000 milligrams (mg)
1 second (s) = 1000 milliseconds (ms)
SI Prefixes
Here is a table of the SI prefixes and some of their properties:
Name & Symbol |
Base 10 |
Decimal |
English Word |
Adoption |
|
Short Scale |
Long Scale |
||||
Quetta (Q) | 1030 |
1,000,000,000,000,000,000,000,000,000,000 |
Nonillion |
Quintillion |
2022 |
Ronna (R) | 1027 |
1,000,000,000,000,000,000,000,000,000 |
Octillion |
2022 |
|
Yotta (Y) | 1024 |
1,000,000,000,000,000,000,000,000 |
Septillion |
Quadrillion |
1991 |
Zetta (Z) | 1021 |
1,000,000,000,000,000,000,000 |
Sextillion |
Trilliard |
1991 |
Exa (E) | 1018 |
1,000,000,000,000,000,000 |
Quintillion |
Trillion |
1975 |
Peta (P) | 1015 |
1,000,000,000,000,000 |
Quadrillion |
Billiard |
1975 |
Tera (T) | 1012 |
1,000,000,000,000 |
Trillion |
Billion |
1960 |
Giga (G) | 109 |
1,000,000,000 |
Billion |
Milliard |
1960 |
Mega (M) | 106 |
1,000,000 |
Million |
1873 |
|
Kilo (k) | 103 |
1,000 |
Thousand |
1795 |
|
Hecto (h) | 102 |
100 |
Hundred |
1795 |
|
Deca (da) | 101 |
10 |
Ten |
1795 |
|
One (1) | 100 |
1 |
One |
- |
|
Deci (d) | 10-1 |
0.1 |
Tenth |
1795 |
|
Centi (c) | 10-2 |
0.01 |
Hundredth |
1795 |
|
Milli (m) | 10-3 |
0.001 |
Thousandth |
1795 |
|
Micro (µ) | 10-6 |
0.000001 |
Millionth |
1873 |
|
Nano (n) | 10-9 |
0.000000001 |
Billionth |
Milliardth |
1960 |
Pico (p) | 10-12 |
0.000000000001 |
Trillionth |
Billionth |
1960 |
Femto (f) | 10-15 |
0.000000000000001 |
Quadrillionth |
Billiardth |
1964 |
Atto (a) | 10-18 |
0.000000000000000001 |
Quintillionth |
Trillionth |
1964 |
Zepto (z) | 10-21 |
0.000000000000000000001 |
Sextillionth |
Trilliardth |
1991 |
Yocto (y) | 10-24 |
0.000000000000000000000001 |
Septillionth |
Quadrillionth |
1991 |
Ronto (r) | 10-27 |
0.000000000000000000000000001 |
Octillionth |
2022 |
|
Quecto (q) | 10-30 |
0.000000000000000000000000000001 |
Nonillionth |
Quintillionth |
2022 |
Other Prefix Unit Definitions
- Atto (a)
- Centi (c)
- Deca (da)
- Deci (d)
- Deka (da)
- Exa (E)
- Exbi (Ei)
- Femto (f)
- Gibi (Gi)
- Giga (G)
- Hecto (h)
- Kibi (Ki)
- Kilo (k)
- Mebi (Mi)
- Mega (M)
- Micro (µ)
- Milli (m)
- Nano (n)
- One (1)
- Pebi (Pi)
- Peta (P)
- Pico (p)
- Qubi (Qi)
- Quecto (q)
- Quetta (Q)
- Robi (Ri)
- Ronna (R)
- Ronto (r)
- Tebi (Ti)
- Tera (T)
- Yobi (Yi)
- Yocto (y)
- Yotta (Y)
- Zebi (Zi)
- Zepto (z)
- Zetta (Z)
Convert to Another Prefix Unit
Related Definitions
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Sources
“Milli-.” Wikipedia, Wikimedia Foundation, 27 Feb. 2020, en.wikipedia.org/wiki/Milli-.