Calc Board Help
Circular constant π
pi = 3.1415926535898 Euler’s number e
E = 2.718281828459 SI prefixes
kilo, nano, … Standard gravity g
g = 9.80665 m/s2 Avogadro constant NA
Na = 6.0221415⋅1023 mol-1 Loschmidt constant n0
n0 = 2.6867773⋅1025 m-3 Atomic mass u
u = 1.66053886⋅10-27 kg Rest masses of elementary particles
me, mp, mn, etc. Boltzmann constant k
kB = 1.3806505⋅10-23 J/K Universal gas constant R
R = 8.314472 J⋅mol-1⋅K-1 Molar gas volume Vm
Vm = 22.413996 l/mol Standard atmosphere p0
p0 = 101 325 Pa Gravitational constant G
G = 6.674⋅10-11 m3⋅kg-1⋅s-2 Vacuum speed of light c
c = 299 792 458 m/s Elementary charge e
el = 1.60217653⋅10-19 C Electric constant ε0
eps = 8.854⋅10-12 F/m Magnetic constant μ0
m0 = 12.566⋅10-7 N⋅A-2 Faraday constant F
F = 96 485.3383 C/mol Wien’s displacement constant b
b = 2.8977685⋅10-3 m⋅K Stefan-Boltzmann constant σ
sb = 5.6704⋅10-8 W⋅m-2⋅K-4 Planck constant h
h = 6.6260693⋅10-34 Js Reduced Planck constant ħ
hp = h/2π = 1.05457⋅10-34 Js Rydberg constant R∞
ryd = 1.09737⋅107 m-1 Rydberg frequency R
Rf = c⋅R∞ = 3.2898⋅1015 Hz Rydberg energy Ry
Ry = h⋅c⋅R∞ = 13.6057 eV Bohr radius a0
a0 = 0.5291772108⋅10-10 m Bohr magneton μB
mB = 9.27400949⋅10-24 J/T Nuclear magneton μN
mN = 5.05078343⋅10-27 J/T Compton wavelength (electron) λC,e
Ce = 2.426310238⋅10-12 m Compton wavelength (neutron) λC,n
Cn = 1.3195909067⋅10-15 m Compton wavelength (proton) λC,p
Cp = 1.3214098555⋅10-15 m Classical electron radius re
re = 2.817940325⋅10-15 m Fine-structure constant α
fine = 7.297352568⋅10-3 Fluxon Φ0
flux = 2.06783372⋅10-15 Wb Josephson constant KJ
Kj = 1/Φ0 = 483.598⋅1012 Hz/V Landé g-factor of the electron ge
ge = 2.0023193043718 Gyromagnetic ratio γProton
gyro = 2.675⋅108 rad⋅s-1⋅T-1 Quantum Hall resistance RK
Rk = 25.812807449⋅103 Ω
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Settings

To get to Calc Board’s settings, place your mouse onto the widget. A board will appear, featuring four objects. Clicking the sponge will wipe any text off the board. Your variables and functions will be kept untouched.

Calc Board Settings

Clicking the triangle in the lower right corner will flip the widget, taking you to its settings.


Angle mode and rounding

Calc Board Settings: Angle and Rounding

On the first settings page, you will find a switch for setting the angle mode and a slider for choosing the rounding precision you need.

Click on the angle switch to choose between Degrees and Radians.

Click on the slider or grab the sliding knob to choose the rounding precision you want. This effects only the final result. Any internal calculation will be done using the highest precision available. At the end of a calculation, the result will be rounded and shown to you.


Adjusting font face and size

Calc Board Settings: Font face and size

The next options panel (click the right arrow or the second circle in the upper right corner to get there) lets you choose a font face and adjust the text size. Click the button in order to open a list of fonts. Choose the one you like most. The slider to its right adjusts the text size.


Checking for a new version

Calc Board Settings: Check for Updates

Click the switch to choose whether you want to allow Calc Board to check for a new version when Dashboard opens for the first time (e.g. after a reboot). If dashboard is already loaded, the widget won’t check again until you log out or reboot.

To manually check for updates, press the button next to the switch.

The widget tells you when an update is available by showing a yellow badge on its front side.


Restoring constants

Calc Board Settings: Restore constants and functions

The widget saves user-defined variables and functions as well as changes you do to any predefined constant. If you need to restore the widget’s constants to their default values, press the button on the last settings panel.

Variables and functions that did not come by default will not be touched and keep their values. Everything you find on this help site will be reset to its standard values and definitions.