Demo
Import module
>>> from electronvolt import *
Rest mass of an electron
>>> me
9.1093837015e-31 * kg
SI units
Rest energy of the electron, in>>> me * c**2
8.187105776823886e-14 * m**2 * s**-2 * kg
In mega electronvolts
>>> me * c**2 / MeV
0.5109989499961642
This matches the electron rest energy on Wikipedia.
Usage
Install via pip install electronvolt
.
online
Alternatively, run this module- Typically loads within 3 minutes.
- Shift+enter to run a block of code. Run first block to initialize the calculator.
Units and Constants
Name | Symbol | Value | Unit |
---|---|---|---|
Math Constants | |||
pi |
3.141592653589793 | ||
Euler's number | euler |
2.718281828459045 | |
Metric Prefixes | |||
yotta |
1 e+24
|
||
zetta |
1 e+21
|
||
exa |
1 e+18
|
||
peta |
1 e+15
|
||
tera |
1 e+12
|
||
giga |
1 e+09
|
||
mega |
1000000 | ||
kilo |
1000 | ||
hecto |
100 | ||
deca |
10 | ||
deci |
0.1 | ||
centi |
0.01 | ||
milli |
0.001 | ||
micro |
1 e-06
|
||
nano |
1 e-09
|
||
pico |
1 e-12
|
||
femto |
1 e-15
|
||
atto |
1 e-18
|
||
zepto |
1 e-21
|
||
yocto |
1 e-24
|
||
Common Prefixes | |||
hundred |
100 | ||
thousand |
1000 | ||
million |
1000000 | ||
billion |
1 e+09
|
||
trillion |
1 e+12
|
||
SI Base Units | |||
second | s |
1 | s |
meter | m |
1 | m |
kilogram | kg |
1 | kg |
ampere | A |
1 | A |
kelvin | K |
1 | K |
mole | mol |
1 | mol |
candela | cd |
1 | cd |
Time | |||
minute |
60 | s |
|
hour |
3600 | s |
|
day |
86400 | s |
|
week |
604800 | s |
|
year |
31557600 | s |
|
millisecond | ms |
0.001 | s |
microsecond | us |
1 e-06
|
s |
nanosecond | ns |
1 e-09
|
s |
Length | |||
kilometer | km |
1000 | m |
decimeter | dm |
0.1 | m |
centimeter | cm |
0.01 | m |
millimeter | mm |
0.001 | m |
micrometer | um |
1 e-06
|
m |
nanometer | nm |
1 e-09
|
m |
picometer | pm |
1 e-12
|
m |
femtometer | fm |
1 e-15
|
m |
Frequency | |||
hertz | Hz |
1 | s-1 |
kilohertz | kHz |
1000 | s-1 |
megahertz | MHz |
1000000 | s-1 |
gigahertz | GHz |
1 e+09
|
s-1 |
terahertz | THz |
1 e+12
|
s-1 |
Classical Mechanics | |||
gravitational acceleration | g |
9.80665 |
m s-2
|
newton | N |
1 |
kg m s-2
|
pascal | Pa |
1 |
kg m-1 s-2
|
joule | J |
1 |
kg m2 s-2
|
watt | W |
1 |
kg m2 s-3
|
Thermodynamics | |||
Planck constant | h |
6.62607015 e-34
|
kg m2 s-1
|
reduced Planck constant | hbar |
1.05457181765 e-34
|
kg m2 s-1
|
Avogadro constant | NA |
6.02214076 e+23
|
mol-1 |
Boltzmann constant | kB |
1.380649 e-23
|
kg m2 s-2 K-1
|
ideal gas constant | R |
8.31446261815324 |
kg mol-1 K-1 m2 s-2
|
Electromagnetism | |||
coulomb | C |
1 |
s A
|
volt | V |
1 |
kg A-1 m2 s-3
|
farad | F |
1 |
kg-1 A2 m-2 s4
|
Ohm |
1 |
kg A-2 m2 s-3
|
|
tesla | T |
1 |
kg A-1 s-2
|
weber | Wb |
1 |
kg m2 s-2 A-1
|
henry | H |
1 |
kg A-2 m2 s-2
|
speed of light | c |
299792458 |
m s-1
|
vacuum magnetic permeability | mu0 |
1.25663706212 e-06
|
kg A-2 m s-2
|
vacuum electric permittivity | epsilon0 |
8.8541878128 e-12
|
kg-1 m-3 s4 A2
|
Coulomb constant | k |
8987551792.26078 |
kg m3 s-4 A-2
|
elementary charge | e |
1.602176634 e-19
|
s A
|
Imperial Units | |||
inch ('in' is a python keyword) | in_ |
0.0254 | m |
foot | ft |
0.3048 | m |
yard | yd |
0.9144 | m |
mile | mi |
1609.344 | m |
acre |
4046.8564224 | m2 |
|
nautical mile | NM |
1852 | m |
knot | kn |
0.514444444444445 |
m s-1
|
US gallon | gal |
0.003785411784 | m3 |
pound-mass | lb |
0.45359237 | kg |
pound-force | lbf |
4.4482216152605 |
kg m s-2
|
slug |
14.59390293720637 | kg |
|
blob |
175.1268352464764 | kg |
|
Common Units | |||
kilometer per hour | kph |
0.277777777777778 |
m s-1
|
miles per hour | mph |
0.44704 |
m s-1
|
gram |
0.001 | kg |
|
liter | L |
0.001 | m3 |
pound per square inch | psi |
6894.757 |
kg m-1 s-2
|
kilowatt-hour | kWh |
3600000 |
kg m2 s-2
|
hectare | ha |
10000 | m2 |
Atomic Physics | |||
electron rest mass | me |
9.1093837015 e-31
|
kg |
proton mass | mp |
1.67262192369 e-27
|
kg |
neutron mass | mn |
1.67492749804 e-27
|
kg |
atomic mass unit | u |
1.6605390666 e-27
|
kg |
atomic mass of hydrogen | mH |
1.6735327848 e-27
|
kg |
atomic mass of helium | mHe |
6.64647698905 e-27
|
kg |
Quantum Mechanics | |||
Stefan-Boltzmann constant | sigma |
5.67037441918 e-08
|
kg K-4 s-3
|
Bohr radius | a0 |
5.29177210906 e-11
|
m |
hydrogen ground state energy | hground |
-2.1798723611 e-18
|
kg m2 s-2
|
fine-structure constant | alpha |
0.007297352569278 | |
Rydberg constant | Rydberg |
10973731.56807162 | m-1 |
Radioactive Decays | |||
becquerel | Bq |
1 | s-1 |
curie | Ci |
3.7 e+10
|
s-1 |
millicurie | mCi |
37000000 | s-1 |
microcurie | uCi |
37000 | s-1 |
Nuclear Physics | |||
electronvolt | eV |
1.602176634 e-19
|
kg m2 s-2
|
kilo-electronvolt | keV |
1.602176634 e-16
|
kg m2 s-2
|
mega-electronvolt | MeV |
1.602176634 e-13
|
kg m2 s-2
|
giga-electronvolt | GeV |
1.602176634 e-10
|
kg m2 s-2
|
tera-electronvolt | TeV |
1.602176634 e-07
|
kg m2 s-2
|
electronvolt per speed of light | eVpc |
5.34428599268 e-28
|
kg m s-1
|
mega-electronvolt per c | MeVpc |
5.34428599268 e-22
|
kg m s-1
|
electronvolt per c squared | eVpc2 |
1.78266192163 e-36
|
kg |
mega-electronvolt per c squared | MeVpc2 |
1.78266192163 e-30
|
kg |
Cosmology | |||
gravitational constant | G |
6.6743 e-11
|
kg-1 m3 s-2
|
astronomical unit | au |
149597870700 | m |
light-year | ly |
9460730472580800 | m |
parsec | pc |
3.08567758149 e+16
|
m |
megaparsec | Mpc |
3.08567758149 e+22
|
m |
Hubble parameter | H0 |
2.3333610884 e-18
|
s-1 |
More Demo
ufloat
from uncertainties
Import >>> from uncertainties import ufloat
Rest mass of an electron
>>> me = ufloat(9.1093837015, 0.0000000028) * 1e-31 * kg
Rest energy of the electron
>>> me * c**2
(8.1871057768+/-0.0000000025)e-14 * kg * s**-2 * m**2
This matches the electron rest energy on the same Wikipedia page.