# `Localize.UnitConversionError`
[🔗](https://github.com/elixir-localize/localize/blob/v0.38.0/lib/localize/exception/unit_conversion_error.ex#L1)

Exception raised when a unit conversion cannot be performed.

This may occur because the units are not convertible, the unit
requires a special conversion that is not supported, or the
conversion involves mixed units.

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*Consult [api-reference.md](api-reference.md) for complete listing*