Turning Soap Bars into Liquid Soap

Turning Soap Bars into Liquid Soap

Why is this method useful

You may be wondering how I ended up even wanting to change the consistency of my soap. If its liquid, its liquid and if its a bar, its a bar. What is there to complain about that? A couple of years ago, I would have wondered the same thing, but since I began my journey of making more household products myself, I’ve noticed the quantity of projects that call for a good, high-quality liquid soap as a base. Oftentimes, this is castille soap. Liquid castille soap is not something we really have in Europe. You can purchase it on Amazon but at a ridiculous price. So I scoured the stores, turns out it isn’t that easy to find a junk-free, perfume-free liquid soap at a decent price. So I bought soap bars instead. Turns out, turning soap bars into liquid soap is super easy.

Turning Soap Bars Into Liquid Soap / Make homemade liquid soap / Reuse soap scraps / Make liquid soap base / Easy, Fast 2 ingredients

Turning soap bars into liquid soap is a useful little trick that allows you to create a sheer endless number of things. I use my liquid soap base for cleaning both my home and body.

  •  I love this method especially for use with homemade soap bars because I know exactly what is in it. You can of course also use store-bought soap.
  • No matter what kind of soap you use, starting with bars is often significantly cheaper than buying liquid soap.
  • If you are already using soap bars on your body, consider turning them into liquid soap instead, because soap bars have a much higher potential for harboring bacteria due to their exposure to the environment and the surface moisture after use.
  • Finally, if you are using soap bars, you can use the left-over scraps for this recipe as well.

Turning Soap Bars Into Liquid Soap / Make homemade liquid soap / Reuse soap scraps / Make liquid soap base / Easy, Fast 2 ingredients


What soap to use

When turning soap bars into liquid soap, I prefer using unscented natural soap because that way I can use the liquid soap for most things. Castille soap is a great choice as it is a simple soap in terms of ingredients, giving you a lot of play room to add extra ingredients to the liquid base. If you want to make the soap bar yourself as well I recommend checking out the Soap Queen, which is a good place to start.

However, if you are planning on using the soap on your body you can also pick a scented soap or a soap with specific properties or ingredients for the skin. Alternatively, for those of you who are really frugal, you can save the leftovers of used bars of soap (those little pieces that are too small to use) and make liquid soap out of those.

Turning Soap Bars Into Liquid Soap / Make homemade liquid soap / Reuse soap scraps / Make liquid soap base / Easy, Fast 2 ingredients

How is it done

The trick when turning soap bars into liquid soap is to start with a 4 to 3 ratio. 4 ounces (113 g) of soap to 3 cups (700 ml) of water. This is a good place to start for any bar of soap. Since soaps differ from brand to brand you may need to adjust the amount of soap/water to get the desired consistency. But don’t be scared to experiment, you really can’t ruin it. Worst case scenario: you need to get more bars of soap.


Let me know in the comments below what you use your soap base for or what other things you would like to see me make. I wanna hear from you!

Turning Soap Bars Into Liquid Soap

Soap Bars to Liquid Soap
Prep Time
10 mins
Cook Time
45 mins
Total Time
55 mins

Turn any soap bar, whether homemade or store-bought, into liquid soap.

Course: Cleaning
Cuisine: Household
Servings: 4 cups
Author: Laura
  • 4 ounce soap bar (113 g)
  • 3 cups water (700 ml)
  • 2 tbsp glycerin (optional)
  1. Bring the 3 cups of water to a boil.

  2. Grate the soap or finely chop. Fill the grated soap into a quart-sized heat-resistant bowl or jar.

  3. Pour the boiling water over the grated soap and stir to combine. Once fully combined cover and let sit for 45 minutes. Stirring occasionally.

  4. The soap mixture should be slightly thickened by now. Add the glycerin if desired (see note).

  5. Fill the soap mixture into a quart-sized mason jar (if you didn't make it in one) and use as desired.


Note: The glycerin gives the soap a smoother texture and prevents it from getting very gel-like.

If the soap is too thick after 45 min, heat some more water and add it to the mixture, stirring to combine.

If too liquid, transfer to a pot and heat on the stove top adding more grated soap. Should the soap separate after being stored, simply shake to mix again.

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Turning Soap Bars Into Liquid Soap / Make homemade liquid soap / Reuse soap scraps / Make liquid soap base / Easy, Fast 2 ingredients


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This post was shared on: Homestead Blog Hop

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[…] wipes as I find it gives me a deeper cleanse. I make my own liquid soap for this (learn how here). If you don’t want to use water on your face after using the wipes or if you are planning to […]


I had never thought about turning bar soap into liquid, but I can definitely see the many uses! Thanks for sharing on Homestead Blog Hop!

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