Defining Units and Unit Functions
You can define your own units or unit functions to use in your worksheet.
User-Defined Units
Define units as you define variables. Apply the unit label to the name of the unit to ensure that PTC Mathcad can carry out unit checking:
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Example
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Without Unit Label
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With Unit Label
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Define a unit.
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Evaluate the unit. The result is returned in the unit system of the worksheet.
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Replace the unit in the result with the unit defined above. PTC Mathcad only recognizes the unit when it has been labeled.
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Watch this video to learn more about defining units:
Unit Functions
You can use unit functions to associate a quantity with a value, or to scale the value. The built-in temperature units °C and °F are examples of unit functions because they are not multiplicative. The base unit for temperature is Kelvin and for converting Kelvins to degrees Celsius or Fahrenheit, you need to add a constant term. You can define your own unit functions, such as the decibel:
You need not add the function argument (x) when you use a unit function:
