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## Convert micro [μ] to milli [m]

1 micro [μ] = 0.001 milli [m]

#### Current Density

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Overview

Early Measuring Systems

Length

Mass

Volume

Evolution of Various Measuring Systems

The Metric System

The SI

Metric Prefixes

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## Overview

In this article, we will talk about the metric system and its history. We will look at how it evolved from the earliest known measuring systems and will discuss what it is now, with a look at its extension, the SI system.

For our ancestors who lived in a world full of dangers, having a way to measure things in the natural environment was a window into understanding the natural phenomena, a way of making sense of their surroundings, and of obtaining some control over this environment. This is why people from early times invented and constantly improved various measuring systems. In the early days, just like today, having a measuring system was important for building shelter, sewing clothes, for daily activities like cooking, and of course, for trade. Many believe that the invention and adoption of the metric system and the International System of Units, the SI, is one of the greatest achievements in science and technology, and in the development of the human race.

## Early Measuring Systems

Early measuring systems adopted familiar objects for measuring and comparing against. For example, many believe that the base 10 system is a direct result of the fact that we have 10 fingers and 10 toes. Our hands are always with us, so to speak, so from ancient times people used fingers to count. Yet we did not always use a base 10 system of units, and the metric system is a relatively recent invention. Systems of units developed independently in each region, and while there were some similarities across these systems, most of them were different enough to create difficulties in converting between these systems once trade developed among nations.

Early measurement systems were heavily dependent on the measurements of objects surrounding the people that developed these systems, and inconsistencies were in part a result of the size variation of these objects. For example, the length was based on the length of body parts, while volume and mass were based on the volume and mass of seeds and other small objects. Below we will look in more detail at these units.

### Length

Cubit and palm

Length in Ancient Egypt was measured in **cubits** and then in **royal cubits**, a cubit being the length from the elbow to the tip of the extended middle finger. A royal cubit was thus the cubit but measured on the royal person, the pharaoh. A prototype was created based on this measurement, and it was publicly available so that the people could create their own prototypes. This, of course, was a rather arbitrary unit, which changed with each new succession. Ancient Babylonians used a similar system, with slightly different values for the smaller units.

The cubit was subdivided into smaller units such as **palms**, **hands**, **feet**, and **digits**, which were represented by the width of a palm, a hand, a foot, and a finger respectively. At this time some abstraction was made when agreeing how many digits are in a palm (4), a hand (5), and a cubit (28 in Egypt and 30 in Babylon), instead of measuring it out every time.

### Mass

Weights, on the other hand, were based on the mass of an individual seed, grain, bean, or another similar object. A classic example of this is the unit of mass still in use, the **carat**, now used for measuring precious stones. It was originally based on the weight of a carob seed. Different regions often used these smaller units such as seeds, and the larger units which were often multiples of the smaller units. These larger units often had artifacts, which were standardized weights, generally made of stone. The value of these units varied from region to region, and each larger unit was often comprised of 60, 100, or another number of the smaller units. Since neither the value of the units nor the number of units that they were divided into were universal, there were confusions and disagreements when merchants from different regions traded with each other.

### Volume

Initially, volume was also measured using these small items. For example, the volume of a container, like a jug or a cauldron, would be determined by the number of small items of relatively uniform size, for example, seeds, that fit into the container. Lack of standardization caused similar problems with the units for volume as with those for mass and length.

## Evolution of Various Measuring Systems

Greeks built their measuring system on those of the Egyptians and the Babylonians, and Romans built theirs on the Greek system. These systems then spread across Europe through trade and conquest. We should mention that we are only discussing the major systems here, but there were many others, since every local area had a need for exchanging items, and thus for a measuring system. Some of these areas and local societies did not have a writing system or did not keep written records, and now we cannot trace what their measuring systems were.

There were many regional variations in the measuring systems due to their disjoint development and outside influences from different sources through trade and conquest. This variation was not only between countries, but within the country borders as well, often due to the local lords, rulers, and nobility resisting unification in order to preserve their power in the area. As travel, trade, industry, and the sciences developed, and as countries strove for unification within their borders, there came a need for a uniform system of measures.

As early as the 13th century, and possibly even earlier, scientists and philosophers discussed creating a unified measuring system. It was not until the French Revolution and subsequent colonization of various regions of the world by France and other European nations that adopted this new system, that the new measuring system was developed and adopted across the globe. This new system was the **decimal metric system**. It was a base-ten system, meaning that smaller units taken to the power of ten made up larger units. That is, a larger unit divided into ten smaller units, and these smaller units each divided into ten even smaller units, and so on.

As we can see, not all of the early measuring systems were base 10. The convenience of using a base 10 system is that our most commonly used numeral system is also base ten, therefore it is easy to convert between smaller and larger units. Many scientists believe that base ten is arbitrary and that we use it only because we have ten fingers, and that if we had a different number of fingers, our numeral system would have been different.

## The Metric System

Originally, units of the metric system were based on the artifacts for length and weight, just like in the earlier measuring systems. The metric system went through an evolution and its dependence on artifacts changed to dependence on natural phenomena and constants present in nature. For example, the unit for time, a second, was defined first as a specific fraction of the tropical year 1900. However, it was impossible to verify this constant through experimentation in all of the years that followed 1900, since it was not possible to measure this year once it finished. To address this problem the second was later redefined as a specific number of cycles of radiation emitted during a change of state of an atom of caesium-133. The unit for distance, a meter, was linked to the wavelength of light emitted by an atom of krypton-86, but later was redefined as the distance that light travels in a vacuum within a specified timeframe.

The metric system evolved into the International System of Units, or the SI, and the two terms are often used interchangeably. We should note that traditionally the metric system includes the units for mass, distance, and time, while SI is an extended system that includes more basic units, as we discuss below.

## The SI

SI works with seven standard base units: **kilogram** (kg) for mass, **second** (s) for time, **meter** (m) for distance, **candela** (cd) for luminous intensity, **mole** (mol) for the amount of substance, **ampere** (A) for electric current, and **kelvin** (K) for temperature. All the other units are derived from these seven.

Only the kilogram is still dependent on an artifact, but the rest of the units depend on the constants found in nature and natural phenomena. This is convenient because the constants or the natural phenomena that these units are based on can be verified at any time, and there is no risk of lost or damaged artifacts, and no need to create duplicate artifacts to make them accessible across the globe. This eliminates errors associated with duplicating physical objects, thus ensuring more accuracy.

## Metric Prefixes

In order to denote quantities that are either multiples or sub-multiples of base units, the SI uses prefixes with the base unit names. Below is a list of all the prefixes in use and the values that they refer to:

Prefix | Symbol | Numerical | Exponential |
---|---|---|---|

yotta | Y | 1,000,000,000,000,000,000,000,000 | 10^{24} |

zetta | Z | 1,000,000,000,000,000,000,000 | 10^{21} |

exa | E | 1,000,000,000,000,000,000 | 10^{18} |

peta | P | 1,000,000,000,000,000 | 10^{15} |

tera | T | 1,000,000,000,000 | 10^{12} |

giga | G | 1,000,000,000 | 10^{9} |

mega | M | 1,000,000 | 10^{6} |

kilo | k | 1,000 | 10^{3} |

hecto | h | 100 | 10^{2} |

deka | da | 10 | 10^{1} |

none | 1 | 10^{0} | |

deci | d | 0.1 | 10^{-1} |

centi | c | 0.01 | 10^{-2} |

milli | m | 0.001 | 10^{-3} |

micro | μ | 0.000001 | 10^{-6} |

nano | n | 0.000000001 | 10^{-9} |

pico | p | 0.000000000001 | 10^{-12} |

femto | f | 0.000000000000001 | 10^{-15} |

atto | a | 0.000000000000000001 | 10^{-18} |

zepto | z | 0.000000000000000000001 | 10^{-21} |

yocto | y | 0.000000000000000000000001 | 10^{-24} |

For example, 5 gigameters equal to 5,000,000,000 meters, while 3 microcandelas equal to 0.000003 candelas. It is interesting to note that even though the kilogram has a prefix, it is, in fact, a base unit. So the prefixes above are applied to the gram instead, treating the gram as if it is a base unit.

At the time of writing, most of the countries in the world have adopted SI with only three exceptions: the USA, Liberia, and Myanmar. Canada and the U.K. still use imperial units along with SI in some spheres, even though SI is the official system of units.

This article was written by Kateryna Yuri

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Calculations for the **Metric Prefixes Converter** converter are made using the math from unitconversion.org.

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### Metric Prefixes Converter

A **metric prefix** is a unit prefix that precedes a base unit of measurement to indicate a decimal multiple or fraction of the unit. Metric prefixes are sometimes called SI prefixes. Each prefix has a unique symbol that is added to the unit symbol. For example, the prefix mega- may be added to ton to indicate multiplication by one million; one megaton is equal to one million tons (1 Mt = 1,000,000 t). Likewise, the prefix milli- may be added to gram to indicate division by one thousand; one milligram is equal to one-thousandth of a gram (1 mg = 0.001 g). Metric prefixes are sometimes used with imperial and US customary units such as microinch and kilopound.

In accounting, finance, oil and gas, and several other industries, M is sometimes used for a thousand from *mille*, which is the Roman numeral for a thousand. MM is used for a million which is one thousand squared. MMM is used for a billion which is a thousand cubed. MM for one million can be seen in several traditional units such as MMBtu (one million BTU), MMcf (one million cubic feet). MMM for one billion is used in traditional units such as MMMBtu (one billion BTU), MMMcf (one billion cubic feet). However, in Roman numeration, MM actually means 2000, not one million and MMM — 3000, not one billion. Since the single letter M is now used commonly for one million because it is a metric prefix mega-, the use of MM or MMM is confusing and strongly discouraged.

### Using the Metric Prefixes Converter Converter

This online unit converter allows quick and accurate conversion between many units of measure, from one system to another. The Unit Conversion page provides a solution for engineers, translators, and for anyone whose activities require working with quantities measured in different units.

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You can use this online converter to convert between several hundred units (including metric, British and American) in 76 categories, or several thousand pairs including acceleration, area, electrical, energy, force, length, light, mass, mass flow, density, specific volume, power, pressure, stress, temperature, time, torque, velocity, viscosity, volume and capacity, volume flow, and more. **Note:** Integers (numbers without a decimal period or exponent notation) are considered accurate up to 15 digits and the maximum number of digits after the decimal point is 10.

In this calculator, E notation is used to represent numbers that are too small or too large. **E notation** is an alternative format of the scientific notation a · 10^{x}. For example: 1,103,000 = 1.103 · 10^{6} = 1.103E+6. Here E (from exponent) represents “· 10^”, that is “*times ten raised to the power of*”. E-notation is commonly used in calculators and by scientists, mathematicians and engineers.

- Select the unit to convert from in the left box containing the list of units.
- Select the unit to convert to in the right box containing the list of units.
- Enter the value (for example, “15”) into the left
**From**box. - The result will appear in the
**Result**box and in the**To**box. - Alternatively, you can enter the value into the right
**To**box and read the result of conversion in the**From**and**Result**boxes.

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## FAQs

### How do you convert Micro to milli? ›

The formula to convert Micro to Milli is **1 Micro = 0.001 Milli**. Micro is 1000 times Smaller than Milli. Enter the value of Micro and hit Convert to get value in Milli.

### How many is Micro? ›

Micro (Greek letter μ (U+03BC) or the legacy symbol µ (U+00B5)) is a unit prefix in the metric system denoting a factor of **10 ^{−}^{6}** (one millionth). Confirmed in 1960, the prefix comes from the Greek μικρός (mikrós), meaning "small".

### What is between Micro and milli? ›

Factor | Name | Symbol |
---|---|---|

10^{-}^{3} | milli | m |

10^{-}^{6} | micro | µ |

10^{-}^{9} | nano | n |

10^{-}^{12} | pico | p |

### Which is bigger milli or Micro? ›

A micrometer, also called a micron, is **one thousand times smaller than millimeter**. It is equal to 1/1,000,000th (or one millionth of meter).

### How do you Convert Micro to KG? ›

μ stands for micros and k stands for kilos. The formula used in micros to kilos conversion is **1 Micro = 1E-09 Kilo**. In other words, 1 micro is 1000000001 times smaller than a kilo.

### How do you Convert Micro to CM? ›

How to Convert Micro to Centi (μ to c) By using our Micro to Centi conversion tool, you know that one Micro is equivalent to 0.0001 Centi. Hence, to convert Micro to Centi, we just need to **multiply the number by 0.0001**.

### How do you write 1 micro? ›

Micrometers can be abbreviated as µm; for example, 1 micrometer can be written as **1 µm**. To get an idea of the actual physical length of a micrometer, one human hair is 40-50 µm thick, demonstrating how small this unit of measure is.

### How do I convert micro to Nano? ›

The formula to convert Micro to Nano is **1 Micro = 1000 Nano**. Micro is 1000 times Bigger than Nano.

### How many seconds is a day in a year? ›

One minute has 60 seconds, One hour has 60 minutes and one day has 24 hours. Thus, 80 x 60 x 24 = 86,400 seconds in a day. One common calendar year has 365 days: Thus, 365 x 86,400 = **31,563,000 seconds** in a year.

### What is the prefix 10? ›

In the SI, designations of multiples and subdivision of any unit may be arrived at by combining with the name of the unit the prefixes **deka, hecto, and kilo** meaning, respectively, 10, 100, and 1000, and deci, centi, and milli, meaning, respectively, one-tenth, one-hundredth, and one-thousandth.

### How do you convert unit prefixes? ›

How to Convert Metric System Prefixes | Crash Chemistry Academy

### How do you convert to milli? ›

To convert a second measurement to a millisecond measurement, **multiply the time by the conversion ratio**. The time in milliseconds is equal to the seconds multiplied by 1,000.

### What are the 10 unit of measurement? ›

10 millimeters (mm) | = 1 centimeter (cm) |
---|---|

10 decimeters | = 1 meter (m) = 1000 millimeters |

10 meters | = 1 dekameter (dam) |

10 dekameters | = 1 hectometer (hm) = 100 meters |

10 hectometers | = 1 kilometer (km) = 1000 meters |

### Whats smaller Micro or Milli? ›

Micrometer A micrometer (also called a micron) is **1000 times smaller than a millimeter**. 1 millimeter (mm) = 1000 micrometers (μm).

### What's smaller than a Micro? ›

Prefix | Measurement | Scientific Notation |
---|---|---|

Micro- | 0.000001 m | 1 x 10^{-}^{6} m |

Nano- | 0.000000001 m | 1 x 10^{-}^{9} m |

Pico- | 0.000000000001 m | 1 x 10^{-}^{12} m |

Femto- | 0.000000000000001 m | 1 x 10^{-}^{15} m |

### How do you Convert units to Micro units? ›

The formula to convert Micro to Unit is **1 Micro = 1E-06 Unit**. Micro is 1000000 times Smaller than Unit.

### How do you Convert Nano to KG? ›

How to convert Nano to Kilo? The formula to convert Nano to Kilo is **1 Nano = 1E-12 Kilo**. Nano is 1000000000000 times Smaller than Kilo.

### What is 10 kg expressed in μg? ›

...

Kilograms to Micrograms table.

Kilograms | Micrograms |
---|---|

8 kg | 8000000000.00 µg |

9 kg | 9000000000.00 µg |

10 kg | 10000000000.00 µg |

11 kg | 11000000000.00 µg |

### What is this μm? ›

micrometre, also called micron, **metric unit of measure for length equal to 0.001 mm, or about 0.000039 inch**. Its symbol is μm. The micrometre is commonly employed to measure the thickness or diameter of microscopic objects, such as microorganisms and colloidal particles.

### How do you Convert Nano to Mega? ›

...

Nano to Mega Conversion Table.

Nano [n] | Mega [M] |
---|---|

1 n | 1.0E-15 M |

2 n | 2.0E-15 M |

3 n | 3.0E-15 M |

5 n | 5.0E-15 M |

### How do you Convert to Mega? ›

The formula to convert Unit to Mega is **1 Unit = 1E-06 Mega**.

### Is μ and µm same? ›

The microns unit number **1.00 µ converts to 1 µm**, one micrometer. It is the EQUAL length value of 1 micrometer but in the microns length unit alternative.

### What size is 5um? ›

In this article, micron and micrometer are used interchangeably. To give you an idea of how small micrometer-sized particles are, **waste matter from dust mites** is about 5 micrometers in size, while a strand of hair is about 100 to 150 micrometers wide.

### What does 1E 6 mean? ›

1E–6 is the same as **0.000001 (one millionth)**.

### What is the prefix of nano? ›

Nano (symbol n) is a unit prefix meaning "**one billionth**". Used primarily with the metric system, this prefix denotes a factor of 10^{−}^{9} or 0.000000001. It is frequently encountered in science and electronics for prefixing units of time and length. One nanometer is about the length that a fingernail grows in one second.

### How many Pico is a Micro? ›

How to convert Micro to Pico? The formula to convert Micro to Pico is 1 Micro = **1000000 Pico**.

### How many nano are in a Micro? ›

Micro [µ] | Nano [n] |
---|---|

1 µ | 1000 n |

2 µ | 2000 n |

3 µ | 3000 n |

5 µ | 5000 n |

### How many seconds are there in the month of December? ›

Month | Number of Days | Number of Seconds |
---|---|---|

November | 30 | 2,592,000 |

December | 31 | 2,678,400 |

Year | 365 | 31,536,000 |

Leap Year | 366 | 31,622,400 |

### How many seconds are in 365 days in a year? ›

Thus, the number of seconds in 365 days is **31,536,000 seconds**.

### How many hours makes a year? ›

Every Common Year: 24 hours x 365 days = **8,760 hours**. Every Leap Year: 24 hours x 366 days: 8,784 hours.

### How do you convert to Milli? ›

To convert a second measurement to a millisecond measurement, **multiply the time by the conversion ratio**. The time in milliseconds is equal to the seconds multiplied by 1,000.

### How do you convert micromolar to molar? ›

The formula to convert Micromolar to Molar[M] is **1 Micromolar = 1E-06 Molar[M]**. Micromolar is 1000000 times Smaller than Molar[M].

### How many micros are in a Milli? ›

Milli [m] | Micro [µ] |
---|---|

1 m | 1000 µ |

2 m | 2000 µ |

3 m | 3000 µ |

5 m | 5000 µ |

### Is Micro or Milli smaller? ›

Micrometer A micrometer (also called a micron) is **1000 times smaller than a millimeter**. 1 millimeter (mm) = 1000 micrometers (μm).

### How many ml is 20 units? ›

**10 ml** (20 units)

### What size is 40mm in inches? ›

### How do you convert Nano to Mega? ›

...

Nano to Mega Conversion Table.

Nano [n] | Mega [M] |
---|---|

1 n | 1.0E-15 M |

2 n | 2.0E-15 M |

3 n | 3.0E-15 M |

5 n | 5.0E-15 M |

### How do you Convert Micromolar to micrograms per mL? ›

The simple formula is: **( µg/mL ) = ( µM ) * ( MW in KD)** , ( ng/mL ) = ( nM ) * ( MW in KD) , ( pg/mL ) = ( pM ) * ( MW in KD) . For example: If the protein molar concentration is labeled as 2 µM, and the MW of the protein is 40 KD, then this protein product's mass concentration will be 2 ( µM ) * 40 ( KD ) = 80 µg/mL.

### What is Micromolar units? ›

Listen to pronunciation. (MY-kroh-MOH-ler) **A concentration of 1/1,000,000 (one millionth) molecular weight per liter (mol/L)**.

### How do you make 100 Micromolar solutions? ›

For a 1:100 dilution, **add 1 mL of the stock solution to 99 mL solvent**. (ii) The second dilution. Add 1 mL of the 10 mmol/L solution to 99 mL solvent.

### How do I Convert Micro to Nano? ›

The formula to convert Micro to Nano is **1 Micro = 1000 Nano**. Micro is 1000 times Bigger than Nano.

### How much is a Milli? ›

Milli (symbol m) is a unit prefix in the metric system denoting a factor of **one thousandth** (10^{−}^{3}). Proposed in 1793, and adopted in 1795, the prefix comes from the Latin mille, meaning one thousand (the Latin plural is milia).

### How do you Convert to Micro? ›

How to Convert Milli to Micro (m to μ) By using our Milli to Micro conversion tool, you know that one Milli is equivalent to 1000 Micro. Hence, to convert Milli to Micro, we just need to **multiply the number by 1000**.

### Is μm and um the same? ›

...

Micrometre | |
---|---|

Unit system | SI |

Unit of | length |

Symbol | μm |

Conversions |

### What's smaller than a micro? ›

Prefix | Measurement | Scientific Notation |
---|---|---|

Micro- | 0.000001 m | 1 x 10^{-}^{6} m |

Nano- | 0.000000001 m | 1 x 10^{-}^{9} m |

Pico- | 0.000000000001 m | 1 x 10^{-}^{12} m |

Femto- | 0.000000000000001 m | 1 x 10^{-}^{15} m |

### What is the smallest meter? ›

Unit | Value |
---|---|

Meter (m) | 1 Meter |

Decimeter (dm) | 0.1 Meter |

Centimeter (cm) | 0.01 Meters |

Millimeter (mm) | 0.001 Meters |