Dilutions Cheat Sheet for Dr. Bronner’s Castile Soap

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Dilute! Dilute! OK!* But how much? Here is a quick reference. None of this is a hard and fast rule. If your stuff is really dirty or your water is really hard, then you may want to use more than the recommended amount. However, this should get you started. You’ll notice that for some applications, I recommend pre-diluting the soap – combining the soap with water in a container. For other applications, the soap is diluted by the water present in the situation. It’s a matter of personal preference. Keep in mind that if you predilute, you are also diluting the preservative (tocopherols – vitamin E), so the shelf life drops. Use within a couple weeks. And yes, there are 18 uses here. Dr. Bronner's Castile Liquid Soaps

* Long time Dr. Bronner’s users will remember this expression from the old labels.

Body Uses:

Face: 2-3 drops on wet hands, applied to wet face

Body: one small squirt on a wet washcloth, applied to a wet body

Hair: ½ Tbsp. in your hand, worked into wet hair, or dilute ½ Tbsp. in ½ a cup of water and work that into wet hair

Bath: Completely depends upon water amount, but roughly 2 Tbsp. soap in an average sized tub. (Doesn’t bubble, but still cleans)

Shaving: Face – 10 drops; Underarms – 3 drops; Legs – ½ tsp; Work to a lather in wet hands and then apply to area.

Teeth: 1 drop on a toothbrush. (Yes, it tastes like soap.)

Foot Bath: 1 ½ tsp. in a small tub of hot water.

Clearing Congestion: 1 Tbsp. in a bowl of steamy hot water. Breathe in mist with a towel draped over the head.

Household uses:

Dishes (handwashing): Pre-dilute 1:10 with water. Squirt on a scrub brush and scrub dishes.

Laundry: 1/3-1/2 c. of soap for a large load in a normal washer. Add ½ c. vinegar to the rinse cycle. Use half of these amounts for HE

Mopping: ½ c. of soap in 3 gallons of hot water

All-purpose cleaning: ¼ c. soap in a quart of water in a spray bottle. Add ¼ tsp. tea tree essential oil if desired.

Windows: 1 Tbsp. soap in a quart of water in a spray bottle. Follow up with pure club soda, or half vinegar/ half water.

Toilet: Predilute 1:4 with water in a squirt bottle. Add ¼ tsp. tea tree oil. Empty toilet, squirt bowl thoroughly, sprinkle baking soda on the brush, scrub bowl, let sit 10 minutes, turn water on, flush.

Other Uses:

Fruit and Veggie Rinse: 1 dash (approx.. ¼ tsp.) in a bowl of water. Dunk produce and swish. Then rinse in clear water.

Dog washing: Amount varies widely depending on size, hair type and length, and overall dirtiness. I wet my dog thoroughly, then start to work in castile soap up and down their body until I have a good lather. Really massage it in down to the skin. Your dog will thank you for it.

Plant spray for bugs: 1 Tbsp. in a quart of water. Add ½ tsp. cayenne pepper or cinnamon, if desired.

Ant spray (not on plants): ¼ c. tea tree soap in a quart of water. (This concentration will burn plants.)

I’ve tried to keep this short and sweet. If you have any questions, please ask away!

To download a one page copy of this cheat sheet, click here.

1,221 thoughts on “Dilutions Cheat Sheet for Dr. Bronner’s Castile Soap

  1. Hi, Lisa.
    I’m just wondering if any of your customers have given you any feedback about using Dr. B’s soap for cleaning partial dentures and what their experiences have been regarding effectiveness, abrasion, etc.
    Thank you in advance for any advice you can offer.
    Sandra Jean

    • Hi Sandra Jean – I have not had feedback on this topic, but my grandfather (Dr. Bronner) used the Peppermint castile to clean his own dentures. He had full dentures, though, and I am not sure the details. Personally, I use the Castile to clean the bite guard I wear at night. I’ve had it for years and the soap has worked excellently.

      Other readers please weigh in here!

  2. Hi Lisa,

    I’ve just recently discovered Dr. Bronner’s and after researching how beneficial it can be, I’ve ordered the Tea Tree castile liquid soap. My main purposes to use the Tea Tree soap are to cleanse my face, rid acne and scarring, and remove my makeup in lieu of a makeup wipe.
    How much soap should I start with when diluting as a face wash? What is the proper way to use the Tea Tree soap as a makeup remover? Also, would you recommended another moisturizer besides the Lavender Coconut Lotion?
    Looking forward to using your products very soon.

    • Hi Nicole – Glad you found us! The Tea Tree Castile is an excellent option for a facial wash. I do not predilute the soap for this as I find that several drops from the 8 oz. bottle I keep by my sink does the trick. I wet my face, lather several drops of soap in my hands and then massage on to my face. I do this twice a day. If you prefer, you can dilute the soap in a foaming pump dispenser at a ratio of 1:3. The only time I need something more is when I’ve been wearing waterproof mascara or heavier eyeliner. Then I use coconut oil, which is very gentle on the eyes, to lift the make up. When my face is especially dry, I use a nightly masque of coconut oil once a week – about a pea-sized amount of coconut oil massaged into the face before bedtime.

      Here are a couple of posts that might be helpful: Coconut Oil as Make-up Remover and I Wash My Face with Castile Soap

  3. Hi! Our siding to our house has algea/mildew on it. I was wondering if I could use Dr. Bronner’s to clean it. If so, what ways should I go about doing it? Can I use it in my power washer? Or would it be best to dilute in a bucket and scrub the siding with it? Looking forward to hearing back!

    • Hi Angela – The Castile isn’t the best option to use outside if you have hard water because it can leave a whitish film. A better option is the Dr. Bronner’s Sal Suds. Just a drop mixed with water in your solution compartment of your pressure washer will do a great job. It is biodegradable and won’t harm any landscaping.

  4. Hello friends,
    I want to share a solution that I have been using to help my family use Dr Bonners castile soap as hand soap in the bathroom without wasting it. I make a “gel” using a product called Clear Gel, used to make homemade canned pie filling. It is inexpensive, white powder similar to cornstarch. Depending on how much you make will depend on how much castile soap you use but for instance I made an XL batch the other day and used about 4 cups of water, 1 cup or less powdered Clear Gel, heated on the stove until thick then added about 1/2 cup of Dr. Bonners. I can then add essential oils like tea tree or a scent and maybe some added coconut oil for dry winter skin and put it in a regular pump dispenser and Voila! I hope this helps some of you Dr. Bonners fans.

    • Hi Susie – I hope this helps. Let me know if any specific questions arise from your customers.

  5. I am curious to find out if Dr. Bonner’s Sal’s Suds are safe to clean stone floors with a wet mop? (Travertine & Limestone floors and Travertine Shower surround.

    • Hi Sue – Yes, it is safe for softer stones. The concern with softer stone is that acidic cleansers can etch them. Sal Suds, however, is alkaline, and when diluted for mopping, the pH is practically neutral.

  6. Hi! I purchased a bottle of 18-in-1 Hemp Peppermint Pure Castile Soap. You have on your cheat sheet that it can be used to mop floors. I have a greasy build up on my hardwood floors from using a different soap over the years. Is it ok to use the Peppermint soap on hardwoods? Also, to remove the greasy build up how would you suggest I use it and in what ratio to water? Thanks.

    • Hi Val – Yes, I think the Castile will do great with removing the build up. Because the amount of grime on your floors sounds a little higher than average, you may need more soap. Use about 1 1/2 gallons hot water and add 1/2 c. of soap.

  7. Hi Do you have any information on the Potassium Hydroxide in the soap. Is is safe..It says ** None remains after saponifying oils into soap & glycerin but what does that mean??

    • Hi Karen – Ooh! I love talking about soap chemistry! Soap is made, and has been made for millenia, by combining oils with strong alkalis. In our case, for the oils we use a blend of coconut, olive, palm (or palm kernel), hemp and jojoba. For the alkali we use sodium hydroxide or potassium hydroxide. The oils need a powerful alkali that is strong enough to break apart the oil molecule. An oil molecule has four parts: one glycerin section, and three fatty acid section. This is why it is called a triglyceride. Tri=three, glyceride for the glycerine. The alkali is a combination of either a sodium or potassium atom attached to a hydroxide (which means one hydrogen and one oxygen atom). When the oil and alkali gets together, all the molecules come apart. The fatty acid sections from the oil molecule recombines with either the sodium or potassium ion from the alkali and forms a salt of a fatty acid, otherwise commonly known as soap. The glycerin stays separate and makes the soap more nourishing, and then those hydroxide sections of the alkali combine with each other and form water. We test every batch to make sure all those alkali molecules got consumed so that there is none left in the final product. I hope that helps! Please let me know if you have further questions.

  8. Our daughter is expecting our first grandchild this February and was told that Dr. Bronner’s Pure Castile Baby Unscented is the best to use on a newborn. Would you please advise on how to use for baby’s first bath as their skin is so delicate?

    Thank you,

    • Hi Laurie – Congratulations! Yes, our Unscented Baby-Mild Castile is excellent for baby’s delicate skin. It was first requested from us by the UCLA Medical Center Maternity Ward for use on their newborns. I wrote about my using it with my own little ones here: http://www.lisabronner.com/using-castile-baby-mild-soap-on-babies/. As awesome as it is for their skin, it is important to note that no soap is tear-free, so do not use it on the face.

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