# Unitful.jl and Mixing Ratios

**URL:** https://discourse.julialang.org/t/unitful-jl-and-mixing-ratios/125883
**Category:** General Usage
**Created:** [February 14, 2025, 12:35am UTC](https://discourse.julialang.org/t/unitful-jl-and-mixing-ratios/125883 "2025-02-14T00:35:10Z")
**Posts on this page:** 2
**Page:** 1

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### Author: ![natgeo-wong](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/natgeo-wong/32/10965_2.png) [@natgeo-wong](https://discourse.julialang.org/u/natgeo-wong)
#### Post date: [February 14, 2025, 12:35am UTC](https://discourse.julialang.org/t/unitful-jl-and-mixing-ratios/125883/1 "2025-02-14T00:35:10Z")

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Hi! I have a question.

In Climate Science, it is very common for units to be expressed in `kg kg^-1` (e.g., specific humidity). However, in Unitful.jl this is taken to be ` ` (i.e., unitless), which while technically accurate is not how it is done realistically.

Is there a way to specify to prevent the default multiplication of units?

I have also opened an issue on this [here](https://github.com/PainterQubits/Unitful.jl/issues/768)

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### Author: ![briochemc](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/briochemc/32/4209_2.png) [@briochemc](https://discourse.julialang.org/u/briochemc)
#### Post date: [February 14, 2025, 1:53am UTC](https://discourse.julialang.org/t/unitful-jl-and-mixing-ratios/125883/2 "2025-02-14T01:53:07Z")

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I think this was asked by @jar1 here already: [https://discourse.julialang.org/t/unitful-quantities-of-something](https://discourse.julialang.org/t/unitful-quantities-of-something).