Units
Math Notepad supports units. Units can be used in basic arithmetic
operations like add and subtract, and units can be converted from
one to another.
All available units are listed in the table below.
Base |
Unit |
Length |
meter (m), inch (in), foot (ft), yard (yd), mile (mi), link (li), rod (rd), chain (ch), angstrom, mil |
Surface |
m2, sqin, sqft, sqyd, sqmi, sqrd, sqch, sqmil |
Volume |
m3, litre (l, L, lt, liter), cc, cuin, cuft, cuyd, teaspoon, tablespoon |
Liquid volume |
minim (min), fluiddram (fldr), fluidounce (floz), gill (gi), cup (cp), pint (pt), quart (qt), gallon (gal), beerbarrel (bbl), oilbarrel (obl), hogshead, drop (gtt) |
Angles |
rad, deg, grad, cycle |
Time |
second (s), seconds, minute (minutes), hour (h, hours), day (days) |
Mass |
gram(g), tonne, ton, grain (gr), dram(dr), ounce (oz), poundmass (lbm, lb, lbs), hundredweight (cwt), stick, stone |
Electric current |
ampere (A) |
Temperature |
kelvin (K), celsius (degC), fahrenheit (degF), rankine (degR) |
Amount of substance |
mole (mol) |
Luminous intensity |
candela (cd) |
Force |
newton (N), dyne (dyn), poundforce (lbf) |
Energy |
joule (J), erg, Wh, BTU, electronvolt (eV) |
Power |
watt (W), hp |
Pressure |
Pa, psi, atm |
Electricity and magnetism |
ampere (A), coulomb (C), watt (W), volt (V), ohm, farad (F), weber (Wb), tesla (T), henry (H), siemens (S), electronvolt (eV) |
Binary |
bit (b), byte (B) |
Note that all relevant units can also be written in plural form, for example 5 meters
instead of 5 meter
or 10 seconds
instead of 10 second
.
Surface and volume units can alternatively be expressed in terms of length units raised to a power, for example 100 in^2
instead of 100 sqin
.
Prefixes
The following decimal prefixes are available.
Name |
Abbreviation |
Value |
deca |
da |
1e1 |
hecto |
h |
1e2 |
kilo |
k |
1e3 |
mega |
M |
1e6 |
giga |
G |
1e9 |
tera |
T |
1e12 |
peta |
P |
1e15 |
exa |
E |
1e18 |
zetta |
Z |
1e21 |
yotta |
Y |
1e24 |
Name |
Abbreviation |
Value |
deci |
d |
1e-1 |
centi |
c |
1e-2 |
milli |
m |
1e-3 |
micro |
u |
1e-6 |
nano |
n |
1e-9 |
pico |
p |
1e-12 |
femto |
f |
1e-15 |
atto |
a |
1e-18 |
zepto |
z |
1e-21 |
yocto |
y |
1e-24 |
The following binary prefixes are available.
They can be used with units bit
(b
) and byte
(B
).
Name |
Abbreviation |
Value |
kibi |
Ki |
1024 |
mebi |
Mi |
1024^2 |
gibi |
Gi |
1024^3 |
tebi |
Ti |
1024^4 |
pebi |
Pi |
1024^5 |
exi |
Ei |
1024^6 |
zebi |
Zi |
1024^7 |
yobi |
Yi |
1024^8 |
Name |
Abbreviation |
Value |
kilo |
k |
1e3 |
mega |
M |
1e6 |
giga |
G |
1e9 |
tera |
T |
1e12 |
peta |
P |
1e15 |
exa |
E |
1e18 |
zetta |
Z |
1e21 |
yotta |
Y |
1e24 |
Physical Constants
Math Notepad includes the following physical constants. See Wikipedia for more information.
Universal constants
Name |
Symbol |
Value |
Unit |
speedOfLight |
c |
299792458 |
m · s-1 |
gravitationConstant |
G |
6.6738480e-11 |
m3 · kg-1 · s-2 |
planckConstant |
h |
6.626069311e-34 |
J · s |
reducedPlanckConstant |
h |
1.05457172647e-34 |
J · s |
Electromagnetic
Name |
Symbol |
Value |
Unit |
magneticConstant |
μ0 |
1.2566370614e-6 |
N · A-2 |
electricConstant |
ε0 |
8.854187817e-12 |
F · m-1 |
vacuumImpedance |
Z0 |
376.730313461 |
Ω |
coulomb |
κ |
8.9875517873681764e9 |
N · m2 · C-2 |
elementaryCharge |
e |
1.60217656535e-19 |
C |
bohrMagneton |
μB |
9.2740096820e-24 |
J · T-1 |
conductanceQuantum |
G0 |
7.748091734625e-5 |
S |
inverseConductanceQuantum |
G0-1 |
12906.403721742 |
Ω |
magneticFluxQuantum |
f0 |
2.06783375846e-15 |
Wb |
nuclearMagneton |
μN |
5.0507835311e-27 |
J · T-1 |
klitzing |
RK |
25812.807443484 |
Ω |
Atomic and nuclear constants
Name |
Symbol |
Value |
Unit |
bohrRadius |
a0 |
5.291772109217e-11 |
m |
classicalElectronRadius |
re |
2.817940326727e-15 |
m |
electronMass |
me |
9.1093829140e-31 |
kg |
fermiCoupling |
GF |
1.1663645e-5 |
GeV-2 |
fineStructure |
α |
7.297352569824e-3 |
- |
hartreeEnergy |
Eh |
4.3597443419e-18 |
J |
protonMass |
mp |
1.67262177774e-27 |
kg |
deuteronMass |
md |
3.3435830926e-27 |
kg |
neutronMass |
mn |
1.6749271613e-27 |
kg |
quantumOfCirculation |
h / (2me) |
3.636947552024e-4 |
m2 · s-1 |
rydberg |
R∞ |
10973731.56853955 |
m-1 |
thomsonCrossSection |
|
6.65245873413e-29 |
m2 |
weakMixingAngle |
|
0.222321 |
- |
efimovFactor |
|
22.7 |
- |
Physico-chemical constants
Name |
Symbol |
Value |
Unit |
atomicMass |
mu |
1.66053892173e-27 |
kg |
avogadro |
NA |
6.0221412927e23 |
mol-1 |
boltzmann |
k |
1.380648813e-23 |
J · K-1 |
faraday |
F |
96485.336521 |
C · mol-1 |
firstRadiation |
c1 |
3.7417715317e-16 |
W · m2 |
loschmidt |
n0 |
2.686780524e25 |
m-3 |
gasConstant |
R |
8.314462175 |
J · K-1 · mol-1 |
molarPlanckConstant |
NA · h |
3.990312717628e-10 |
J · s · mol-1 |
molarVolume |
Vm |
2.241396820e-10 |
m3 · mol-1 |
sackurTetrode |
|
-1.164870823 |
- |
secondRadiation |
c2 |
1.438777013e-2 |
m · K |
stefanBoltzmann |
σ |
5.67037321e-8 |
W · m-2 · K-4 |
wienDisplacement |
b |
2.897772126e-3 |
m · K |
Note that the values of loschmidt
and molarValue
are at T = 273.15 K
and p = 101.325 kPa
.
The value of sackurTetrode
is at T = 1 K
and p = 101.325 kPa
.
Adopted values
Name |
Symbol |
Value |
Unit |
molarMass |
Mu |
1e-3 |
kg · mol-1 |
molarMassC12 |
M(12C) |
1.2e-2 |
kg · mol-1 |
gravity |
gn |
9.80665 |
m · s-2 |
atm |
atm |
101325 |
Pa |
Natural units
Name |
Symbol |
Value |
Unit |
planckLength |
lP |
1.61619997e-35 |
m |
planckMass |
mP |
2.1765113e-8 |
kg |
planckTime |
tP |
5.3910632e-44 |
s |
planckCharge |
qP |
1.87554595641e-18 |
C |
planckTemperature |
TP |
1.41683385e+32 |
K |