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Independent, non-profitable software & charity platform of Dr. Larry Nylund

Regression Analysis - Graphing - Scientific Calculator - Unit Conversion


Desktop calculator - DesktopCalc v2.1.13 

Find values for your equations in seconds
DesktopCalc is an enhanced, easy-to-use and powerful scientific calculator with an expression editor, printing operation, result history list and integrated help. DesktopCalc gives students, teachers, scientists and engineers the power to find values for even the most complex equation set.

Understandable and convenient interface
DesktopCalc combines fast "just-one-click" interface with broad set of functions. It was designed as a tool that is convenient for both elementary and scientific calculator. DesktopCalc features include the following:

  • Possibility to enter mathematical formulas as with a keyboard as with built-in button-panels
  • Scientific calculations - unlimited expression length
  • Syntax highlight of math expression and proper operator precedence
  • Parenthesis compatible
  • Scientific notation
  • Calculation range:
    - maximal positive number: 1.797E+308
    - minimal positive number: 2.225E-308
  • All functions, mathematical and physical constants can also be used in expression
    - 40 trigonometric, logarithmic, hyperbolic and algebraic functions
    - 50 built-in most common mathematical and physical constants
  • Clipboard smart functionality
    - Cut, Copy and Paste operations

How to work with the program.

1. First, you must enter a formula into the expression-editor either by typing on the keyboard, pressing the buttons on the calculator with the mouse, or a mixture of both.

You can use next operations (as expression syntax):

Operators: + - * / and ( ) [parentheses]
Built-in Functions... [Unless otherwise indicated, all functions take a single numeric argument, enclosed in parentheses after the name of the function]
Algebraic: Abs, Square, Sqrt, Power(x;z) [= x raised to power of z; Use semicolor as the list-separator]
Transcendental: Exp, Ln [natural], LogBase10, LogBase2, LogBaseN(Base;x)
Trigonometric: Sin, Cos, Tan, Cot, Sec, Csc
Other Trig: ArcSin, ArcCos, ArcTan, ArcCot, ArcSec, ArcCsc, Coversine, Exsecans, Haversine, Versine, ArcTan2(x;z)
Hyperbolic: SinH, CosH, TanH, CotH, SecH, CscH
Other Hyp: ArcSinH, ArcCosH, ArcTanH, ArcCotH, ArcSecH, ArcCscH
Miscellaneous: Pythag(v;h) [Pythagoras, where v and h denote vertical and horizontal lengths, respectively]
Constants:{Mathematical constants}
Pi [= 3.1415926535897932384626433832795] {Pi}
PiOn2 [= 1.5707963267948966192313216916398] {Pi / 2}
PiOn3 [= 1.0471975511965977461542144610932] { Pi / 3}
PiOn4 [= 0.78539816339744830961566084581988] {Pi / 4}
Deg [= 57.295779513082320876798154814114] {180 / Pi}
Bernstein [= 0.2801694990238691330364364912307] {Bernstein constant}
Cbrt2 [= 1.2599210498948731647672106072782] {CubeRoot(2)}
Cbrt3 [= 1.4422495703074083823216383107801] {CubeRoot(3)}
Cbrt10 [= 2.1544346900318837217592935665194] {CubeRoot(10)}
Cbrt100 [= 4.6415888336127788924100763509194] {CubeRoot(100)}
CbrtPi [= 1.4645918875615232630201425272638] {CubeRoot(PI)}
Catalan [= 0.9159655941772190150546035149324] {Catalan constant}
Sqrt2 [= 1.4142135623730950488016887242097] {Sqrt(2)}
Sqrt3 [= 1.7320508075688772935274463415059] {Sqrt(3)}
Sqrt5 [= 2.2360679774997896964091736687313] {Sqrt(5)}
Sqrt10 [= 3.1622776601683793319988935444327] {Sqrt(10)}
SqrtPi [= 1.7724538509055160272981674833411] {Sqrt(Pi)}
Sqrt2Pi [= 2.506628274631000502415765284811] {Sqrt(2 * Pi)}
TwoPi [= 6.283185307179586476925286766559] {2 * Pi}
ThreePi [= 9.4247779607693797153879301498385] {3 * Pi}
Ln2 [= 0.69314718055994530941723212145818] {Ln(2)}
Ln10 [= 2.3025850929940456840179914546844] {Ln(10)}
LnPi [= 1.1447298858494001741434273513531] {Ln(Pi)}
Log2 [= 0.30102999566398119521373889472449] {LogBase10(2)}
Log3 [= 0.47712125471966243729502790325512] {LogBase10(3)}
LogPi [= 0.4971498726941338543512682882909] {LogBase10(Pi)}
LogNConst [= 0.43429448190325182765112891891661] {LogBase10(NConst)}
NConst [= 2.7182818284590452353602874713527] {Natural constant; exp(1)}
hLn2Pi [= 0.91893853320467274178032973640562] {Ln(2*Pi)/2}
inv2Pi [= 0.159154943091895] {0.5 / Pi}
TwoToPower63 [= 9223372036854775808.0] {263}
GoldenMean [= 1.618033988749894848204586834365638] {GoldenMean}
EulerMascheroni [= 0.5772156649015328606065120900824] {Euler GAMMA}
Constants:{Certain physical constants expressed in SI units}
Amu [= 1.6606E-27] {Atomic mass unit constant (kg)}
Avog [= 6.0225E23] {Avogadro constant (mol-1)}
Boltz [= 1.3805E-23] {Boltzmann constant (J K-1)}
ECharge [= 1.602189E-19] {Electron charge (C)}
EMass [= 9.11E-31] {Electron mass (kg)}
EVolt [= 1.602E-14] {Electron volt (J)}
Farad [= 96500] {Faraday constant (C mol-1)}
Gas [= 8.314] {Gas constant (J mol-1 K-1)}
Neutron [= 1.6748E-27] {Neutron mass (kg)}
Planck [= 6.626E-34] {Planck constant (Js)}
Proton [= 1.6725E-27] {Proton mass (kg)}
Light [= 2.9979E8] {Speed of light (m s-1)}
Gravity [= 9.80665] {Gravitational acceleration (m s-2)}
Pressure [= 101325] {Normal atmospheric pressure (N m-2)}
Stefan [= 5.67032E-8] {Stefan-Boltzmann constant (W m-2 K-4)}
Bohr [= 5.2917706E-11] {Bohr radius (m)}

Note: Function and constant names are not case-sensitive. For example, Exp is the same as EXP or exp. The variable, which is the letter "x", is also not case-sensitive.

Note: Text after proper mathematical expression, will be ignored by the compiler. You can use this feature to comment your equation set.

Note: In particular, you cannot use ^ for exponentiation, you must use the Power function instead.

Note: All the algebraic, trigonometric, hyperbolic and transcendental routines map directly to Intel 80387 FPU floating point machine instructions.

Note: DesktopCalc handles resulting floating-point values between 2.225E-308 (2-1022) and 1.797E+308 (21024).

Note: As operands you can use numeric constants in any form (2, 2.0, 2e5, 2e-3) with decimal delimiter "period" or "comma", depending on your computer system configuration.

2. Example of formula: sin(tan(cos(43.243)/ln(9.765))/(tan(34.3)*logbaseN(2;3)))*(x - 1.87e-3)
Thus! If your computer system configuration uses "comma" as decimal delimiter/separator, 9.765 in the above example must be 9,765
Example of formula: sin(tan(cos(43,243)/ln(9,765))/(tan(34,3)*logbaseN(2;3)))*(x - 1,87e-3)

3. Edit-box "X value": Assign value to variable "x".

4. Click the "Compute" button to perform calculation.


Payment for DesktopCalc (price: US$15 dollars per license) 

  • via PayPal
    Click the button below to pay
  • After payment, you are redirected automatically to a secured webpage that contains the activation code to unclock DesktopCalc application. Thank you for your purchase!


    The software presented on these pages are for Save-the-Children charity.

    Copyright 2016 Larry Nylund
    Institute of Mathematics and Statistics
    Helsinki, Finland
    All Rights Reserved