# Unitful - derived unit simplification?

**URL:** <https://discourse.julialang.org/t/unitful-derived-unit-simplification/71186>\
**Category:** General Usage\
**Tags:** unitful\
**Created:** [November 9, 2021, 8:04am UTC](https://discourse.julialang.org/t/unitful-derived-unit-simplification/71186 "2021-11-09T08:04:14Z")\
**Posts on this page:** 1\
**Showing post:** 3

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**Author:** ![mde](https://avatars.discourse-cdn.com/v4/letter/m/839c29/32.png) [@mde](https://discourse.julialang.org/u/mde)\
**Post date:** [November 23, 2021, 7:32am UTC](https://discourse.julialang.org/t/unitful-derived-unit-simplification/71186/3 "2021-11-23T07:32:38Z")

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Thank you! `upreferred` simplifies the units perfectly.

Now my examples become:

```julia
julia> 1u"M" * 1u"L" |> upreferred
1 mol

julia> 1u"L" * 1u"1/cm^3" |> upreferred
1000

```

A related post recently came up with the same issue: [Make Unitful simplify expressions like 1μm/1m to a unitless value by default](https://discourse.julialang.org/t/make-unitful-simplify-expressions-like-1-m-1m-to-a-unitless-value-by-default/71866/)

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