Basic Examples (3) 

Define a Quantity composed of different units:

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Convert it to a simple String, using ^ and / to linearize the different powers:

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Compare this with the InputForm of the QuantityUnit of this Quantity:

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Scope (4) 

Display the unit in the same way the FrontEnd does:

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Define your own output format:

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See all the elements that you can access inside of the template:

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Use this to define a more elaborate output:

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Not all types of quantities have only four elements:

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Most of the elements available in the template come from the box representation of the quantity:

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The "BoxForm" output replaces the superscript primes with apostrophes:

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The canonical form riffles the magnitudes with the canonical unit abbreviations:

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Convert different currencies. Note that the position of the currency sign is respected:

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Dated units are supported:

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In the canonical form, the date will be typeset in the ISO format:

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Possible Issues (3) 

There is no guarantee that the strings can be converted back to quantities again:

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The canonical unit string always places the unit after the magnitude, which is not always the typical way to typeset a unit:

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Use a template or the BoxForm appearance to typeset the canonical unit differently:

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Use HoldForm to prevent evaluation of expressions in the first argument of Quantity:

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Compare this to the evaluated form:

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Alternatively you can use Row to typeset this correctly:

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This will also work with the default formatting:

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