electronvolt 1.0.4

A physical quantity calculator.

Demo

Rest mass of an electron

>>> me
9.1093837015e-31 kg

Speed of light

>>> c
299792458.0 m * s**-1

Rest energy of an electron

>>> me * c**2
8.187105776823886e-14 m**2 * s**-2 * kg

In mega electronvolts

>>> me * c**2 / MeV
0.5109989499961642

This matches the rest energy of electron on Wikipedia.

Usage

• Install this module via pip install electronvolt.
• Recommended to use in an interactive python environment, e.g. jupyter notebook.
• Recommended to import via from electronvolt import *.

You can also run this module online HERE.

• This page typically loads in 3 minutes.
• Use shift+enter to run a block of code.
• Run the first block to initialize the calculator.
• Run the second block to feel how it works.

Units and Constants

Variable Name	Value	Unit
Math Constants
pi	3.14159265
euler	2.71828183
Metric Prefixes
yotta	1.00E+24
zetta	1.00E+21
exa	1.00E+18
peta	1.00E+15
tera	1.00E+12
giga	1.00E+09
mega	1000000
kilo	1000
hecto	100
deca	10
deci	0.1
centi	0.01
milli	0.001
micro	1.00E-06
nano	1.00E-09
pico	1.00E-12
femto	1.00E-15
atto	1.00E-18
zepto	1.00E-21
yocto	1.00E-24
Other Prefixes
hundred	100
thousand	1000
million	1000000
billion	1.00E+09
trillion	1.00E+12
SI Units
s	1	s
m	1	m
kg	1	kg
A	1	A
K	1	K
mol	1	mol
cd	1	cd
Time
minute	60	s
hour	3600	s
day	86400	s
week	604800	s
year	31557600	s
ms	0.001	s
us	1.00E-06	s
ns	1.00E-09	s
Length
km	1000	m
dm	0.1	m
cm	0.01	m
mm	0.001	m
um	1.00E-06	m
nm	1.00E-09	m
fm	1.00E-15	m
Frequency
Hz	1	s**-1
kHz	1000	s**-1
MHz	1000000	s**-1
GHz	1.00E+09	s**-1
THz	1.00E+12	s**-1
Classical Mechanics
g	9.80665	m * s**-2
N	1	kg * m * s**-2
Pa	1	kg * m**-1 * s**-2
J	1	kg * m**2 * s**-2
W	1	kg * m**2 * s**-3
Thermodynamics
h	6.63E-34	kg * m**2 * s**-1
hbar	1.05E-34	kg * m**2 * s**-1
NA	6.02E+23	mol**-1
kB	1.38E-23	kg * m**2 * s**-2 * K**-1
R	8.31446262	kg * mol**-1 * K**-1 * m**2 * s**-2
Electromagnetism
C	1	s * A
V	1	kg * A**-1 * m**2 * s**-3
F	1	kg**-1 * A**2 * m**-2 * s**4
Ohm	1	kg * A**-2 * m**2 * s**-3
T	1	kg * A**-1 * s**-2
Wb	1	kg * m**2 * s**-2 * A**-1
H	1	kg * A**-2 * m**2 * s**-2
c	299792458	m * s**-1
mu0	1.26E-06	kg * A**-2 * m * s**-2
epsilon0	8.85E-12	kg**-1 * m**-3 * s**4 * A**2
k	8.99E+09	kg * m**3 * s**-4 * A**-2
e	1.60E-19	s * A
Everyday Life
mile	1609.344	m
kph	0.277777778	m * s**-1
mph	0.44704	m * s**-1
gram	0.001	kg
L	0.001	m**3
kWh	3600000	kg * m**2 * s**-2
Atomic Physics
me	9.11E-31	kg
mp	1.67E-27	kg
mn	1.67E-27	kg
u	1.66E-27	kg
mH	1.67E-27	kg
mHe	6.65E-27	kg
Quantum Mechanics
sigma	5.67E-08	kg * K**-4 * s**-3
a0	5.29E-11	m
hground	-2.18E-18	kg * m**2 * s**-2
alpha	0.007297353
Rinfty	10973731.6	m**-1
Radioactive Decay
Bq	1	s**-1
Ci	3.70E+10	s**-1
mCi	37000000	s**-1
uCi	37000	s**-1
Nuclear Physics
eV	1.60E-19	kg * m**2 * s**-2
keV	1.60E-16	kg * m**2 * s**-2
MeV	1.60E-13	kg * m**2 * s**-2
GeV	1.60E-10	kg * m**2 * s**-2
TeV	1.60E-07	kg * m**2 * s**-2
eVpc	5.34E-28	kg * m * s**-1
MeVpc	5.34E-22	kg * m * s**-1
eVpc2	1.78E-36	kg
MeVpc2	1.78E-30	kg
Cosmology
G	6.67E-11	kg**-1 * m**3 * s**-2
au	1.50E+11	m
ly	9.46E+15	m
pc	3.09E+16	m
Mpc	3.09E+22	m
H0	2.33E-18	s**-1