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User Guide

Conversions & Constants

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Software version: 5.0.4

Conversions & Constants

DreamCalc provides many constants and unit conversions. Many natural and physical constants are conveniently available on the keypad and can be accessed via the [CONST] key. Others, along with unit conversions, can be found under the Insert menu option.

Unit Conversions

Unit conversions are grouped under the Insert menu as follows:

  • Angle
  • Area
  • Energy & Power
  • Force & Pressure
  • Length
  • Mass
  • Speed
  • Temperature
  • Volume

For example, to perform a temperature conversion, select Insert→Temperature and °F→°C.

Unit conversion operate always in a postfix fashion, irrespective of the calculator's input mode. This means that you should input the value first, followed by conversion as selected from the Insert menu.

Example: What is 45.8 degrees Fahrenheit expressed as degrees Celsius?

45.8 [°F→°C] (use the Insert menu)
Displays: 7.66666666666667
          

DRGC Key

DRGC can be found on the main keypad, and allows the input value to be converted to the units designated by the calculator's current angle mode.

Example: Sine of 45 degrees in radians mode.

Put the calculator into the radian mode by selecting Modes→Angle Mode→Radians.

Now key in:

[sin]
45
[DRGC] and select Deg
[ENTER]
Displays: 0.70710678118654752

Constants

Keyboard Constants

A wide selection of constants can be found on the main keypad. These cover commonly used natural and physical constants, such as π and the speed of light (c), as well as some digital computer related values, such as integer sizes. Constant symbols are normally display on the top-right of the key label, can be accessed with the [CONST] key.

Example:

[CONST]
[4] (speed of light c)
Displays: 299,792,458

Because of its common use, you will find that the π constant behaves intelligently and does not always require you to press [CONST] before it. You should find its use comes naturally.

Menu Constants

A larger range of constants are available under the Insert menu, and are grouped as follows:

  • Natural Constants (π etc.)
  • Physical Constants (speed of light etc.)
  • Periodic Table* (atomic weights, melting points etc.)
  • Astronomical Constants* (planetary masses etc.)
  • Spacecraft Geodesy* (used in orbital analysis)
  • Digital Computer (integer sizes etc.)

* These constant groups are not shown by default, but must be enabled from the "Misc." page of the Options Window. The reason for this is that it is more efficient not to show constants not commonly used unless they are required, especially when some constant groups may comprise a large number of items.

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