How to Make Liquid Soap From Bar Soap? A Fool-proof Tutorial

By Marsha Harrison

how to make liquid soap from bar soap

Many people prefer to use liquid soap as it saves them from the trouble of having to clean up soap dish residue. Yet, it is more expensive and not eco-friendly, as zero waste advocates pointed out!

The good news is that there is a work-around. In this tutorial, I will teach you how to make liquid soap from bar soap. Don’t worry, you don’t need to be a pro at soap-making to do this.

What You Need

Generally, you will need the following ingredients and tools for our DIY liquid soap from the bar soap project. However, please refer to a specific soap recipe to check the prescribed quantities.

  • Chopped or grated soap, or bar soap scraps
  • Distilled water
  • Glycerin
  • Natural preservative
  • Soap dispenser
  • Large pan or sauce pot
  • Stick blender

Turning Bar Soap to Liquid Soap Without Glycerin

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1. Break the bar of soap into pieces and heat them in a large pot

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Fill a large pot with 1 gallon of water. Next, chop or grate one 4-ounce soap bar and put them in the pot.

Note: If you want to make a liquid from bar soap scraps, follow the same steps above as advised in this Clark.com article.

Once you have your chopped or grated soap and water in the pot, set your stove to high heat and let the water boil. Be sure to lower the heat to medium as soon as the water is boiling.

At this point, you can start stirring to melt soap into liquid.

Tip: Making liquid soap from Dove bar soap or other cold process soap turns out to be better for this glycerin-free formula.

2. Let the dissolved soap sit overnight and mix it

Allow the mixture to sit overnight to thicken the mixture. Note that, in some cases, the process can take up to 24 hours.

Once the mixture has cooled with a gel-like consistency, you can start blending it with a whisk or a blender stick, says Your Beauty Blog.

Pour the mixture into a soap dispenser and pump some of it on your hands to test.

That’s it! You have now created your first liquid soap without lye or glycerin.

Making Bar Soap Into Liquid Soap With Glycerin

1. Gather the supplies for homemade liquid hand soap from bar soap

To make a liquid hand soap with glycerin, you will need to procure the following:

  • 1 cup of grated bar soap
  • A large pot filled with 10 cups of water
  • 1 tablespoon of vegetable glycerin
  • Optional: 1 teaspoon of essential oils of your choice

In addition to the ingredients above, you will need a hand blender and a soap dispenser.

Although you can try out any bar soap brand, My Plastic Free Life used a 3.55-ounce bar of aloe vera soap with coconut oil, palm oil, and glycerin.

2. Combine ingredients and boil them

Place all the ingredients into the pot. This includes the grated soap flakes, 10 cups of water, and 1 tablespoon of vegetable glycerin.

Turn the heat on the stove on high and bring the water to a boil. Once the water is boiling, decrease the heat to medium-low heat.

Leave it for a couple of minutes until the soap completely dissolves. This is the perfect time to add 1 teaspoon of essential oil, says The Gardening Cook.

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If you notice the soap is a little too thick, you can add a bit of water and use your stick blender to smoothen the mixture.

Make sure it cools down completely before transferring it into your soap dispenser.

Photo by Microgen via Adobe Stock

Frequently Asked Questions

1. Can I turn bar soap into liquid soap using the microwave?

Yes, you can. The ingredients are the same. But instead of using a pot and stove, place grated soap into a microwave-safe bowl and add some water.

Then, put the bowl in the microwave and heat it in 30-second increments. In each interval, Snappy Living reminds DIYers to check for the mixture’s consistency.

Feel free to add water to achieve your desired consistency.

2. What is the advantage of adding glycerin to the soap mixture?

Bar soaps normally already contain glycerin, so there is an option not to use it in one recipe I shared.

However, adding glycerin to make liquid hand soap from bar soap can make the end product creamier. Even better, Going Zero Waste points out that it prevents the mixture from clumping.

3. What should I do to make foaming hand soap from bar soap?

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Simply place the soap in a foaming soap dispenser.

I know that this is a surprisingly easy trick. However, keep in mind that foaming soap is essentially liquid soap with more water. There is no special ingredient that makes it foamy.

To understand the science behind this, I recommend reading this Wikipedia page. It explains that when the foam pump releases liquid soap, it forms the foam in the foaming chamber.

Depending on the consistency of your mixture, you may need to add water to enable the liquid soap to pass through the foaming chamber. Because regular liquid soap is thick, it does not usually work on foaming pumps.

Conclusion

If you notice, the tutorials I shared on how to make liquid soap from bar soap are very easy to follow. Simply grate the soap, boil it in water, leave it overnight, and blend.

Once you memorized the process, you can make liquid soap in your sleep and ditch the store-bought product for good! It reduces plastic waste and helps you save money.

Besides, the ingredients are widely available in most grocery stores.

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