Homemade laundry detergent


I recently ran out of the powdered laundry detergent I buy in bulk at my local co-ops, so I decided to make my own. An internet search for homemade laundry detergent usually yields a wide variety of sources for a basic recipe that calls for washing soda, borax, and grated bar soap. But there’s also quite a debate raging online about the potential health risks of using borax for home and body care. Some sources adamantly claim that the median lethal dose of borax is no higher than the median lethal dose of table salt (about 3 grams per kilogram of weight), making it a perfectly safe laundry detergent ingredient. On the other side of the argument, studies indicate that borax powder is a skin, eye, and lung irritant and if ingested it could cause vomiting, diarrhea, headaches, and lethargy. There is also concern that high or prolonged exposure to borax can lead to infertility and damage to an unborn child.

While wading through some of this information, attempting to sort out factors like the credibility of sources and the dates of each study, it occurred to me that perhaps I was barking up the wrong tree. At some point I realized that I’d rather err on the side of caution and I refocused my energy to try to find some recipes for homemade laundry detergent that didn’t include borax. As it turns out, there are indeed several borax-free recipes floating around on the web and many are just variations of a few basic elements. Baking soda, washing soda, grated bar soap, citric acid, epsom salt, table salt, and white vinegar were the ingredients I came across the most. I’ve begun experimenting to see what mix I like the best, based on what I’m able to acquire within the package-free parameters of my project. For this particular venture I’ve decided to make an exception for products packaged in paperboard or paper bags that are compostable. But to start I did manage to make a completely package-free batch of detergent from one cup baking soda (sodium bicarbonate), one cup washing soda (sodium carbonate), and one grated 4oz bar of unscented glycerin soap.


I was unable to find boxed washing soda on any local store shelf so I decided to make my own. In my research of each ingredient listed above, I discovered that it’s easy to make washing soda at home by simply heating baking soda in the oven. Baking soda’s chemical makeup is NaHCO3 (one sodium, one hydrogen, one carbon, and three oxygen molecules). Washing soda’s chemical makeup is Na2CO3 (two sodium, one carbon, and three oxygen molecules). When heated, the glistening, grainy baking soda gives off water and carbon dioxide, leaving dull, powdery washing soda behind.  I spread a thin layer of bulk-bought baking soda in a shallow pan and baked it at 400 degrees for one hour. I agitated it about a halfway through the bake time. I’ve only done a couple loads of laundry with my baking soda, washing soda, soap mix, but so far my clothes and linens have come out clean, odorless, and not too stiff. An there doesn’t seem to be any soapy residue left on my fabrics. I should mention that I’ve not yet tested this mix on any tough stains, though I’m sure it won’t be long before an opportunity arises.


I saw some recipes for soapless detergents, which call for baking and washing soda, epsom salts (magnesium sulfate), and table salt. Epsom salts are a natural surfactant—a wetting agent that reduces the surface tension of a liquid, allowing it to better penetrate solids. Today, surfactants made from a variety of petrochemicals (derived from petroleum) and/or oleochemicals (derived from fats and oils) are used in generic detergents to render water less likely to stick to itself and more likely to interact with greasy, organic soiling. Considered non-toxic, epsom salts are commonly used in homemade beauty treatments and cleaning solutions. Magnesium sulfate is also used in organic gardening and farming as a soil conditioner/fertilizer. Magnesium helps strengthen cell walls and improve plants’ uptake of nitrogen, phosphorus, and sulfer. And sulfer is critical to production of vitamins, amino acids (therefore protein), and enzymes. The other day while I was in the grocery store, I spotted some epsom salts in a paper carton and decided to purchase them. I transfered the salts to a glass jar, then shredded and composted the packaging. I’m looking forward to experimenting with them in my homemade detergent concoctions and I will post about my findings.

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14 Responses to Homemade laundry detergent

  1. jme2013 October 19, 2013 at 2:22 am #

    I’m wondering what amounts of each ingredient do you use and how much of the soap is recommended for small, medium, large and extra-large loads?

  2. Mia December 13, 2013 at 7:42 am #

    I was wondering how you would buy things like baking powder in bulk at any grocery store.. Is there a special kind of bag that you bring with you that they somehow can subtract the weight of from the total weight of the bag and product? In other words, what do you bring to the store with you to put it in until you get it home and into a glass jar?

    I want to buy things in bulk but have no idea how to do it at my local store where they won’t add the weight of the medium in with the product.
    I hope this makes sense!
    Thank you,

  3. Brian G Crawford April 8, 2014 at 4:26 am #

    There’s a big problem with your recipe. Sodium carbonate and Epsom salts combine to form magnesium carbonate and sodium sulfate. The solubility of magnesium carbonate in water is 0.0106 g/100 mL (25 °C, anhydrous), which means it’s hardly soluble at all. I just did a little experiment with some Arm and Hammer washing soda and some Epsom salts in which I dissolved each in separate cups of warm distilled water. I then mixed the two, and got a suspended preciptate of magnesium carbonate. So, unless you want white stuff all over your clothes, don’t do this. At best, it’s useless, and at worst, you’ll get dried white precipitate on your clothes.

    Use the borax. It works. A simple recipe for laundry detergent is one cup grated soap, one cup borax, and one cup sodium carbonate. It’s a decent recipe. I make my own detergent with grated homemade soap, borax, sodium carbonate, sodium percarbonate, trisodium phosphate, and sodium chloride. I’ve had several people try my recipe, and they all say it’s better than any detergent they’ve ever used. My father was skeptical about it, but when he ran out of Tide, he used it, and he said it took out stains that had been in his work clothes for years. I could actually leave the borax out because the sodium percarbonate produces hydrogen peroxide.

    • Roxana May 8, 2014 at 10:54 pm #

      Hi Brian,

      What is your recipe?…the amounts of each, please?


    • Megan September 13, 2014 at 5:45 pm #

      don’t you need a surfactant in the recipe. I understand that magnesium sulfate precipitates with washing soda but could you just take the washing soda out and replace it with something else? If you just use soap how will it properly penetrate the fabric?

    • Ana May 21, 2015 at 10:58 am #

      Hello Brian, thanks for sharing the ingredients for your homemade laundry detergent. The addition of sodium percabonate sounds great, since it is a key ingredient in Oxiclean and other oxigen based formulas. Could you share the proportions that work for you? Thank you!!

    • Janell June 26, 2015 at 8:53 pm #

      I would like to know the specific ingredients you use and the amounts you use of each. I have been making my laundry soap for a long time. I use borax, baking soda, washing soda, oxyclean and epsom salt. I would like to know what your recipe is. Thanks

    • Rebecca September 1, 2015 at 11:38 pm #

      Hello Brian….any chance you can post your recipe? I am trying to cut xenoestrogens from my home and detergent is so expensive if I want to do that. Thank you in advance!

  4. pest control nj October 21, 2014 at 5:19 pm #

    Hey, thanks for the blog. Much obliged.
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  5. Tam May 20, 2015 at 1:30 pm #

    thank you for sharing this, especially how to make a washing soda! i cannot find washing soda in my country :)

  6. Kathryn May 30, 2015 at 4:52 pm #

    Just something for everyone interested. I buy my borax, non food grade baking soda, and non food grade 20% acitic acid vinegar from a auto industry supplier. He orders it in for me but I’m
    Sure in everyone’s area there is a company similar.
    The cost of borax works out (for me) to be similar to retail – but I get 25 kg in one bag. Less waster, less gas, happy gramma ❤️ Cheers

  7. Gabrielle June 21, 2015 at 3:16 am #

    Your blog is truly an inspiration! We are on a journey to build a “tiny home” which is ~200 sq ft and it built on a trailer to be portable. In this journey, I have stumbled across a zero waste lifestyle and I’m intrigued and intimidated. But I love reading about your success. Especially taking into account that you are a mother of two young boys! I have a young daughter, myself, and will hopefully be expecting soon. We will be incorporating a composting toilet in our tiny home, as well as only glass and metal packaging so seeing your glass bottles for things like lotion and coconut milk is really pleasing to me. I look forward to working towards the kind of success you have seen.

  8. jackie August 14, 2015 at 2:17 am #

    Could I use Castile soap instead?

  9. Penny Hampton July 4, 2017 at 8:04 pm #

    I use laundry magnets. No fuss! Works great!

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