.. _units:

Preferred Units (Settings)
---------------------------

.. image:: _images/unitsettings.JPG
        :alt: Preferred Unit Settings.

The measurements and values within System Optimiser conform to a unit system which can be globally adjusted within the settings below. There is a preset field for changing them quickly, with the option of creating a custom ‘user’ dataset that can comprise of mixed units.

It should be noted that on :ref:`data input boxes<input>` with selectable units, the individual unit can be overridden simply by clicking it and choosing an alternative.

**Preset**
    There are three presets to choose from:

    * Metric - The metric system is used for the units below.
    * Imperial - The imperial system is used for the units below.
    * Custom - A custom dataset is possible, with mixed unit systems.

**Length**
    Four choices of length unit can be selected:

    * Meter
    * Centimeter
    * Inch
    * Feet

**Temperature**
    Three choices of temperature unit can be selected:

    * Celsius
    * Kelvin
    * Fahrenheit

**Weight**
    Three choices of weight unit can be selected:

    * Kilogram
    * Ton
    * Pound

**Angle**
    One choice of angle unit can be selected:

    * Degree

**Duration**
    Two choices of duration unit can be selected:

    * Millisecond
    * Second