Std UnitsCalculator

Description
The Std UnitsCalculator command opens the Units calculator dialog box. The Units calculator can be used to convert values from one unit system to another.



Usage

 * 1) Select the  option from the menu.
 * 2) The Units calculator dialog box opens. For more information see Options.
 * 3) The dialog box is modeless, meaning it can stay open while you continue working in FreeCAD.
 * 4) Press the  button to close the dialog box.

Top row

 * 1) Enter a value with units in the first input box. For example.
 * 2) * Units with exponents should be entered using the notation. For example.
 * 3) * If the input value cannot be recognized or if the units are unknown the => box will display the 'syntax error' message.
 * 4) Enter the target units in the as input box. For example.
 * 5) * If the units are unknown the => box will display the 'unknown unit' message.
 * 6) * If the units in the first and second input box do not match, the => box will display the 'unit mismatch' message. In the example the units match as 'mm' and 'in' are both length units.
 * 7) If there are no input errors the => box will immediately show the result. For the example values the result is.
 * 8) Optionally press the  button to copy the content of the => box to the clipboard. The value can then for example be pasted in a FreeCAD task panel or dialog box.

Text area

 * 1) The conversion performed in the top row can be copied to the text area by pressing  in the first or second input box.
 * 2) The text area can contain multiple conversions and its content can be selected and copied to the clipboard with  and used in other programs.

Quantity

 * 1) Select an option from the Unit system dropdown list. This will be the target unit system. Select Preference system to use the unit system defined in the Preferences.
 * 2) Select an option from the Unit category dropdown list.
 * 3) Enter a value with units in the Quantity input box. The units must match the unit category.
 * 4) * If the Area unit category has been selected, entering certain units is problematic. For example to enter you have to first enter, put the cursor before the  character and then enter.
 * 5) Click in the Decimals input box and press  to convert the value in the Quantity input box.
 * 6) Changing the value in the Decimals input box has no effect on the calculations. The number of decimals defined in the Preferences is always used instead.