SI units
Physical quantity | Name | Symbol |
---|---|---|
*dimensionless units | ||
length | metre | m |
mass | kilogram | kg |
time | second | s |
ampere | A | |
thermodynamic temperature | kelvin | K |
luminous intensity | candela | cd |
amount of substance | mole | mol |
*plane angle | radian | rad |
*solid angle | steradian | sr |
Physical quantity | Name of SI unit | Symbol of SI unit | |
---|---|---|---|
frequency | hertz | Hz | |
energy | joule | J | |
force | newton | N | |
power | watt | W | |
pressure | pascal | Pa | |
electric | charge | coulomb | C |
electric potential difference | volt | V | |
electric resistance | ohm | Ω | |
electric conductance | siemens | S | |
electric capacitance | farad | F | |
weber | Wb | ||
inductance | henry | H | |
magnetic flux density (magnetic induction) | tesla | T | |
luminous flux | lumen | lm | |
illuminance | lux | lx | |
absorbed dose | gray | Gy | |
activity | becquerel | Bq | |
dose equivalent | sievert | Sv |
Submultiple | Prefix | Symbol | Multiple | Prefix | Symbol |
---|---|---|---|---|---|
10−1 | deci | d | 10 | deca | da |
10−2 | centi | c | 102 | hecto | h |
10−3 | milli | m | 103 | kilo | k |
10−6 | micro | μ | 106 | mega | M |
10−9 | nano | n | 109 | giga | G |
10−12 | pico | p | 1012 | tera | T |
10−15 | femto | f | 1015 | peta | P |
10−18 | atto | a | 1018 | exa | E |
10−21 | zepto | z | 1021 | zetta | Z |
10−24 | yocto | y | 1024 | yotta | Y |
From | To | Multiply by |
---|---|---|
in | m | 2.54 × 10−2 |
ft | m | 0.3048 |
sq. in | m2 | 6.4516 × 10−4 |
sq. ft | m2 | 9.2903 × 10−2 |
cu. in | m3 | 1.63871 × 10−5 |
cu. ft | m3 | 2.83168 × 10−2 |
l(itre) | m3 | 10−3 |
gal(lon) | l(itre) | 4.546 09 |
miles/hr | m s−1 | 0.477 04 |
km/hr | m s−1 | 0.277 78 |
lb | kg | 0.453 592 |
g cm−3 | kg m−3 | 103 |
lb/in3 | kg m−3 | 2.767 99 × 104 |
dyne | N | 10−5 |
poundal | N | 0.138 255 |
lbf | N | 4.448 22 |
mmHg | Pa | 133.322 |
atmosphere | Pa | 1.013 25 × 105 |
hp | W | 745.7 |
erg | J | 10−7 |
eV | J | 1.602 10 × 10−19 |
kW h | J | 3.6 × 106 |
cal | J | 4.1868 |
Cite this article
Pick a style below, and copy the text for your bibliography.
-
MLA
-
Chicago
-
APA
"SI units." A Dictionary of Biology. . Encyclopedia.com. 21 Feb. 2019 <https://www.encyclopedia.com>.
"SI units." A Dictionary of Biology. . Encyclopedia.com. (February 21, 2019). https://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/si-units-2
"SI units." A Dictionary of Biology. . Retrieved February 21, 2019 from Encyclopedia.com: https://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/si-units-2
Citation styles
Encyclopedia.com gives you the ability to cite reference entries and articles according to common styles from the Modern Language Association (MLA), The Chicago Manual of Style, and the American Psychological Association (APA).
Within the “Cite this article” tool, pick a style to see how all available information looks when formatted according to that style. Then, copy and paste the text into your bibliography or works cited list.
Because each style has its own formatting nuances that evolve over time and not all information is available for every reference entry or article, Encyclopedia.com cannot guarantee each citation it generates. Therefore, it’s best to use Encyclopedia.com citations as a starting point before checking the style against your school or publication’s requirements and the most-recent information available at these sites:
Modern Language Association
The Chicago Manual of Style
http://www.chicagomanualofstyle.org/tools_citationguide.html
American Psychological Association
Notes:
- Most online reference entries and articles do not have page numbers. Therefore, that information is unavailable for most Encyclopedia.com content. However, the date of retrieval is often important. Refer to each style’s convention regarding the best way to format page numbers and retrieval dates.
- In addition to the MLA, Chicago, and APA styles, your school, university, publication, or institution may have its own requirements for citations. Therefore, be sure to refer to those guidelines when editing your bibliography or works cited list.
SI units
Physical quantity | Name of unit | Symbol for unit |
---|---|---|
length | metre | m |
mass | kilogram | kg |
time | second | s |
ampere | A | |
thermodynamic temperature | kelvin | K |
luminous intensity | candela | cd |
amount of substance | mole | mol |
*plane angle | radian | rad |
*solid angle | steradian | sr |
*supplementary units |
Physical quantity | Name of unit | Symbol for unit |
---|---|---|
frequency | hertz | Hz |
energy | joule | J |
force | newton | N |
power | watt | W |
pressure | pascal | Pa |
electric charge | coulomb | C |
electric potential difference | volt | V |
electric resistance | ohm | Ω |
electric conductance | siemens | S |
electric capacitance | farad | F |
weber | Wb | |
inductance | henry | H |
magnetic flux density (magnetic induction) | tesla | T |
luminous flux | lumen | lm |
illuminance (illumination) | lux | lx |
absorbed dose | gray | Gy |
activity | becquerel | Bq |
dose equivalent | sievert | Sv |
Submultiple | Prefix | Symbol | Multiple | Prefix | Symbol |
---|---|---|---|---|---|
10−1 | deci | d | 101 | deca | da |
10−2 | centi | c | 102 | hecto | h |
10−3 | milli | m | 103 | kilo | k |
10−6 | micro | μ | 106 | mega | M |
10−9 | nano | n | 109 | giga | G |
10−12 | pico | p | 1012 | tera | T |
10−15 | femto | f | 1015 | peta | P |
10−16 | atto | a | 1016 | exa | E |
10−21 | zepto | z | 1021 | zetta | Z |
10−24 | yocto | y | 1024 | yotta | Y |
From | To | Multiply by |
---|---|---|
Temperature conversion | ||
°C (Celsius) = 5/9(°F − 32) | ||
°F (Fahrenheit) = (9/5 × °C) + 32 | ||
in | m | 0.0254 |
ft | m | 0.3048 |
sq in | m2 | 0.00064516 |
sq ft | m2 | 0.092903 |
cu in | m3 | 0.0000164 |
cu ft | m3 | 0.0283168 |
l(itre) | m3 | 0.001 |
gal(lon) | m3 | 0.0045609 |
gal(lon) | litres | 4.5609 |
lb | kg | 0.453592 |
g cm−3 | kg m−3 | 1000 |
lb/in3 | kg m−3 | 27679.9 |
mmHg | Pa | 133.322 |
cal | J | 4.1868 |
m | in | 39.3701 |
cm | in | 0.393701 |
cm2 | sq in | 0.155 |
m2 | sq in | 1550 |
m2 | sq ft | 10.7639 |
m3 | cu in | 61023.6 |
m3 | cu ft | 35.3146 |
m3 | l(itre) | 1000 |
m3 | gal(lon) | 219.969 |
kg | lb | 2.20462 |
kg m−3 | g cm−3 | 0.001 |
kg m−3 | lb/in3 | 0.0000363 |
Pa | mmHg | 0.0075006 |
J | cal | 0.238846 |
Cite this article
Pick a style below, and copy the text for your bibliography.
-
MLA
-
Chicago
-
APA
"SI units." A Dictionary of Nursing. . Encyclopedia.com. 21 Feb. 2019 <https://www.encyclopedia.com>.
"SI units." A Dictionary of Nursing. . Encyclopedia.com. (February 21, 2019). https://www.encyclopedia.com/caregiving/dictionaries-thesauruses-pictures-and-press-releases/si-units
"SI units." A Dictionary of Nursing. . Retrieved February 21, 2019 from Encyclopedia.com: https://www.encyclopedia.com/caregiving/dictionaries-thesauruses-pictures-and-press-releases/si-units
Citation styles
Encyclopedia.com gives you the ability to cite reference entries and articles according to common styles from the Modern Language Association (MLA), The Chicago Manual of Style, and the American Psychological Association (APA).
Within the “Cite this article” tool, pick a style to see how all available information looks when formatted according to that style. Then, copy and paste the text into your bibliography or works cited list.
Because each style has its own formatting nuances that evolve over time and not all information is available for every reference entry or article, Encyclopedia.com cannot guarantee each citation it generates. Therefore, it’s best to use Encyclopedia.com citations as a starting point before checking the style against your school or publication’s requirements and the most-recent information available at these sites:
Modern Language Association
The Chicago Manual of Style
http://www.chicagomanualofstyle.org/tools_citationguide.html
American Psychological Association
Notes:
- Most online reference entries and articles do not have page numbers. Therefore, that information is unavailable for most Encyclopedia.com content. However, the date of retrieval is often important. Refer to each style’s convention regarding the best way to format page numbers and retrieval dates.
- In addition to the MLA, Chicago, and APA styles, your school, university, publication, or institution may have its own requirements for citations. Therefore, be sure to refer to those guidelines when editing your bibliography or works cited list.
SI units
Quantity | Name of unit | Symbol | Equivalent | Reciprocal |
---|---|---|---|---|
length | metre | m | 3.281 feet | 1 ft = 0.3048 m |
mass | kilogram | kg | 2.2 pounds | 1 lb = 0.454 kg |
time | second | s | ||
ampere | A | |||
thermodynamic temperature | kelvin | K | 1°C = 1.8°F | 1°C = 1 K |
luminous intensity | candela | cd | ||
amount of substance | mole | mol |
Quantity | Unit | Symbol |
---|---|---|
plane angle | radian | rad |
solid angle | steradian | sr |
Cite this article
Pick a style below, and copy the text for your bibliography.
-
MLA
-
Chicago
-
APA
"SI units." A Dictionary of Ecology. . Encyclopedia.com. 21 Feb. 2019 <https://www.encyclopedia.com>.
"SI units." A Dictionary of Ecology. . Encyclopedia.com. (February 21, 2019). https://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/si-units
"SI units." A Dictionary of Ecology. . Retrieved February 21, 2019 from Encyclopedia.com: https://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/si-units
Citation styles
Encyclopedia.com gives you the ability to cite reference entries and articles according to common styles from the Modern Language Association (MLA), The Chicago Manual of Style, and the American Psychological Association (APA).
Within the “Cite this article” tool, pick a style to see how all available information looks when formatted according to that style. Then, copy and paste the text into your bibliography or works cited list.
Because each style has its own formatting nuances that evolve over time and not all information is available for every reference entry or article, Encyclopedia.com cannot guarantee each citation it generates. Therefore, it’s best to use Encyclopedia.com citations as a starting point before checking the style against your school or publication’s requirements and the most-recent information available at these sites:
Modern Language Association
The Chicago Manual of Style
http://www.chicagomanualofstyle.org/tools_citationguide.html
American Psychological Association
Notes:
- Most online reference entries and articles do not have page numbers. Therefore, that information is unavailable for most Encyclopedia.com content. However, the date of retrieval is often important. Refer to each style’s convention regarding the best way to format page numbers and retrieval dates.
- In addition to the MLA, Chicago, and APA styles, your school, university, publication, or institution may have its own requirements for citations. Therefore, be sure to refer to those guidelines when editing your bibliography or works cited list.
SI units
Quantity | Name of unit | Symbol | Equivalent | Reciprocal |
---|---|---|---|---|
length | metre | m | 3.281 feet | 1 ft = 0.3048 m |
mass | kilogram | kg | 2.2 pounds | 1 lb = 0.454 kg |
time | second | s | ||
ampere | A | |||
thermodynamic temperature | kelvin | K | 1°C = 1.8°F | 1°C = 1 K |
luminous intensity | candela | cd | ||
amount of substance | mole | mol |
Quantity | Unit | Symbol |
---|---|---|
plane angle | radian | rad |
solid angle | steradian | sr |
Quantity | Name of unit | Symbol | Equivalent | Reciprocal |
---|---|---|---|---|
frequency | hertz | Hz | ||
energy | joule | J | 0.2388 calories | 1 cal = 4.1868 J |
force | newton | N | 0.225 pounds force | 1 lbf = 4.448 N |
power | watt | W | 0.00134 horse power | 1 hp = 745.7 W |
pressure | pascal | Pa | 0.00689 pounds force/sq.inch | 1 lbf/sq.in = 145 Pa |
electric charge | coulomb | C | ||
electric potential difference | volt | V | ||
electric resistance | ohm | Ω | ||
electric conductance | siemens | S | ||
electric capacitance | farad | F | ||
weber | Wb | |||
inductance | henry | H | ||
magnetic flux density | tesla | T | ||
luminous flux | lumen | lm | ||
illuminance | lux | lx | ||
absorbed dose | gray | Gy | ||
activity | becquerel | Bq | ||
dose equivalent | sievert | Sv |
Name of multiple | Symbol | Value (multiply by) |
---|---|---|
atto | a | 10−18 |
femto | f | 10−15 |
pico | p | 10−12 |
nano | n | 10−9 |
micro | μ | 10−6 |
milli | m | 10−3 |
centi | c | 10−2 |
deci | d | 10−1 |
deca | da | 10 |
hecto | h | 102 |
kilo | k | 103 |
mega | M | 106 |
giga | G | 109 |
tera | T | 1012 |
peta | P | 1015 |
exa | E | 1018 |
Cite this article
Pick a style below, and copy the text for your bibliography.
-
MLA
-
Chicago
-
APA
"SI units." A Dictionary of Plant Sciences. . Encyclopedia.com. 21 Feb. 2019 <https://www.encyclopedia.com>.
"SI units." A Dictionary of Plant Sciences. . Encyclopedia.com. (February 21, 2019). https://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/si-units-0
"SI units." A Dictionary of Plant Sciences. . Retrieved February 21, 2019 from Encyclopedia.com: https://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/si-units-0
Citation styles
Encyclopedia.com gives you the ability to cite reference entries and articles according to common styles from the Modern Language Association (MLA), The Chicago Manual of Style, and the American Psychological Association (APA).
Within the “Cite this article” tool, pick a style to see how all available information looks when formatted according to that style. Then, copy and paste the text into your bibliography or works cited list.
Because each style has its own formatting nuances that evolve over time and not all information is available for every reference entry or article, Encyclopedia.com cannot guarantee each citation it generates. Therefore, it’s best to use Encyclopedia.com citations as a starting point before checking the style against your school or publication’s requirements and the most-recent information available at these sites:
Modern Language Association
The Chicago Manual of Style
http://www.chicagomanualofstyle.org/tools_citationguide.html
American Psychological Association
Notes:
- Most online reference entries and articles do not have page numbers. Therefore, that information is unavailable for most Encyclopedia.com content. However, the date of retrieval is often important. Refer to each style’s convention regarding the best way to format page numbers and retrieval dates.
- In addition to the MLA, Chicago, and APA styles, your school, university, publication, or institution may have its own requirements for citations. Therefore, be sure to refer to those guidelines when editing your bibliography or works cited list.
SI units
Quantity | Name of unit | Symbol | Equivalent | Reciprocal |
---|---|---|---|---|
length | metre | m | 3.281 feet | 1 ft = 0.3048 m |
mass | kilogram | kg | 2.2 pounds | 1 lb = 0.454 kg |
time | second | s | ||
ampere | A | |||
thermodynamic temperature | kelvin | K | 1°C = 1.8°F | 1°C = 1 K |
luminous intensity | candela | cd | ||
amount of substance | mole | mol |
Quantity | Unit | Symbol |
---|---|---|
plane angle | radian | rad |
solid angle | steradian | sr |
Quantity | Name of unit | Symbol | Equivalent | Reciprocal |
---|---|---|---|---|
frequency | hertz | Hz | ||
energy | joule | J | 0.2388 calories | 1 cal = 4.1868 J |
force | newton | N | 0.225 pounds force | 1 lbf = 4.448 N |
power | watt | W | 0.00134 horse power | 1 hp = 745.7 W |
pressure | pascal | Pa | 0.00689 pounds force/sq.inch | 1 lbf/sq.in = 145 Pa |
electric charge | coulomb | C | ||
electric potential difference | volt | V | ||
electric resistance | ohm | Ω | ||
electric conductance | siemens | S | ||
electric capacitance | farad | F | ||
weber | Wb | |||
inductance | henry | H | ||
magnetic flux density | tesla | T | ||
luminous flux | lumen | lm | ||
illuminous | lux | lx | ||
absorbed dose | gray | Gy | ||
activity | becquerel | Bq | ||
dose equivalent | sievert | Sv |
Name of multiple | Symbol | Value (multiply by) |
---|---|---|
atto | a | 10−18 |
femto | f | 10−15 |
pico | p | 10−12 |
nano | n | 10−9 |
micro | μ | 10−6 |
milli | m | 10−3 |
centi | c | 10−2 |
deci | d | 10−1 |
deca | da | 10 |
hecto | h | 102 |
kilo | k | 103 |
mega | M | 106 |
giga | G | 109 |
tera | T | 1012 |
peta | P | 1015 |
exa | E | 1018 |
Cite this article
Pick a style below, and copy the text for your bibliography.
-
MLA
-
Chicago
-
APA
"SI units." A Dictionary of Zoology. . Encyclopedia.com. 21 Feb. 2019 <https://www.encyclopedia.com>.
"SI units." A Dictionary of Zoology. . Encyclopedia.com. (February 21, 2019). https://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/si-units-1
"SI units." A Dictionary of Zoology. . Retrieved February 21, 2019 from Encyclopedia.com: https://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/si-units-1
Citation styles
Encyclopedia.com gives you the ability to cite reference entries and articles according to common styles from the Modern Language Association (MLA), The Chicago Manual of Style, and the American Psychological Association (APA).
Within the “Cite this article” tool, pick a style to see how all available information looks when formatted according to that style. Then, copy and paste the text into your bibliography or works cited list.
Because each style has its own formatting nuances that evolve over time and not all information is available for every reference entry or article, Encyclopedia.com cannot guarantee each citation it generates. Therefore, it’s best to use Encyclopedia.com citations as a starting point before checking the style against your school or publication’s requirements and the most-recent information available at these sites:
Modern Language Association
The Chicago Manual of Style
http://www.chicagomanualofstyle.org/tools_citationguide.html
American Psychological Association
Notes:
- Most online reference entries and articles do not have page numbers. Therefore, that information is unavailable for most Encyclopedia.com content. However, the date of retrieval is often important. Refer to each style’s convention regarding the best way to format page numbers and retrieval dates.
- In addition to the MLA, Chicago, and APA styles, your school, university, publication, or institution may have its own requirements for citations. Therefore, be sure to refer to those guidelines when editing your bibliography or works cited list.
SI units
Measurement | Unit | Symbol |
---|---|---|
Basic units | ||
Length | metre | m |
Mass | kilogram | kg |
Time | second | s |
Electric current | ampere | A |
Thermodynamic temperature | kelvin | K |
Amount of substance | mole | mol |
Luminous intensity | candela | cd |
Supplementary units | ||
Plane angle | radian | rad |
Solid angle | steradian | sr |
Derived units | ||
Frequency | hertz | Hz |
Force | newton | N |
Pressure, stress | pascal | Pa |
Work (energy, heat) | joule | J |
Power | watt | W |
coulomb | C | |
Electromotive force | volt | V |
Electric resistance | ohm | 1/2 |
Electric conductance | siemens | S |
Electric capacitance | farad | F |
Inductance | henry | H |
Magnetic flux | weber | Wb |
Magnetic flux density | tesla | T |
Illuminance | lux | lx |
Luminous flux | lumen | lm |
röntgen | r | |
Radiation activity | becquerel | Bq |
Radiation absorbed dose | gray | Gy |
Radiation dose equivalent | sievert | Sv |
Celsius temperature | °Celsius | °C |
Cite this article
Pick a style below, and copy the text for your bibliography.
-
MLA
-
Chicago
-
APA
"SI units." World Encyclopedia. . Encyclopedia.com. 21 Feb. 2019 <https://www.encyclopedia.com>.
"SI units." World Encyclopedia. . Encyclopedia.com. (February 21, 2019). https://www.encyclopedia.com/environment/encyclopedias-almanacs-transcripts-and-maps/si-units
"SI units." World Encyclopedia. . Retrieved February 21, 2019 from Encyclopedia.com: https://www.encyclopedia.com/environment/encyclopedias-almanacs-transcripts-and-maps/si-units
Citation styles
Encyclopedia.com gives you the ability to cite reference entries and articles according to common styles from the Modern Language Association (MLA), The Chicago Manual of Style, and the American Psychological Association (APA).
Within the “Cite this article” tool, pick a style to see how all available information looks when formatted according to that style. Then, copy and paste the text into your bibliography or works cited list.
Because each style has its own formatting nuances that evolve over time and not all information is available for every reference entry or article, Encyclopedia.com cannot guarantee each citation it generates. Therefore, it’s best to use Encyclopedia.com citations as a starting point before checking the style against your school or publication’s requirements and the most-recent information available at these sites:
Modern Language Association
The Chicago Manual of Style
http://www.chicagomanualofstyle.org/tools_citationguide.html
American Psychological Association
Notes:
- Most online reference entries and articles do not have page numbers. Therefore, that information is unavailable for most Encyclopedia.com content. However, the date of retrieval is often important. Refer to each style’s convention regarding the best way to format page numbers and retrieval dates.
- In addition to the MLA, Chicago, and APA styles, your school, university, publication, or institution may have its own requirements for citations. Therefore, be sure to refer to those guidelines when editing your bibliography or works cited list.
SI units
Cite this article
Pick a style below, and copy the text for your bibliography.
-
MLA
-
Chicago
-
APA
"SI units." A Dictionary of Computing. . Encyclopedia.com. 21 Feb. 2019 <https://www.encyclopedia.com>.
"SI units." A Dictionary of Computing. . Encyclopedia.com. (February 21, 2019). https://www.encyclopedia.com/computing/dictionaries-thesauruses-pictures-and-press-releases/si-units
"SI units." A Dictionary of Computing. . Retrieved February 21, 2019 from Encyclopedia.com: https://www.encyclopedia.com/computing/dictionaries-thesauruses-pictures-and-press-releases/si-units
Citation styles
Encyclopedia.com gives you the ability to cite reference entries and articles according to common styles from the Modern Language Association (MLA), The Chicago Manual of Style, and the American Psychological Association (APA).
Within the “Cite this article” tool, pick a style to see how all available information looks when formatted according to that style. Then, copy and paste the text into your bibliography or works cited list.
Because each style has its own formatting nuances that evolve over time and not all information is available for every reference entry or article, Encyclopedia.com cannot guarantee each citation it generates. Therefore, it’s best to use Encyclopedia.com citations as a starting point before checking the style against your school or publication’s requirements and the most-recent information available at these sites:
Modern Language Association
The Chicago Manual of Style
http://www.chicagomanualofstyle.org/tools_citationguide.html
American Psychological Association
Notes:
- Most online reference entries and articles do not have page numbers. Therefore, that information is unavailable for most Encyclopedia.com content. However, the date of retrieval is often important. Refer to each style’s convention regarding the best way to format page numbers and retrieval dates.
- In addition to the MLA, Chicago, and APA styles, your school, university, publication, or institution may have its own requirements for citations. Therefore, be sure to refer to those guidelines when editing your bibliography or works cited list.