Dilutions Cheat Sheet for Dr. Bronner’s Castile

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 Dr. Bronner’s Castile 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.

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

Click here to download the Castile Soap Dilution Cheat Sheet.

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.

Makeup Removal: Wet face and lather several drops of soap into hands. Massage into skin. Rinse.

Hair: A couple drops for close-cropped hair or up to ½ Tbsp. (7.5 mL) for long hair, either worked directly into very wet hair or pre-diluted in a cup of water. Follow with Dr. Bronner’s Citrus Organic Hair Rinse or diluted apple cider vinegar.

Bath: Completely depends upon water amount, but approximately 2 Tbsp. (30 mL) soap in an average sized tub. (Doesn’t bubble, but still cleans.)

Shaving: Face – 10 drops; Underarms – 3 drops; Legs – ½ tsp (2.5 mL); Work to a lather in wet hands, apply to area.

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

Foot Bath: ½ Tbsp. (7.5 mL) in a small tub of hot water.

Clearing Congestion: 1 Tbsp. (15 mL) Peppermint or Eucalyptus Castile soap 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.

Laundry: 1/3-1/2 c. (80-120 mL) soap for a large load in a regular washer. Add 1 c. (240 mL) vinegar to the rinse cycle. Optional: For whitening/deoderizing, add 1/2 c. (120 mL) baking soda to wash cycle. Halve these amounts for HE washers.

Handwashing Delicates: 1 capful soap in about 1 gallon (4 L) cold water. Swish gently. Let soak 10 minutes. Swish again. Rinse with clean water. Gently press out excess water with a towel. Hang or lay clothing flat to dry.

Mopping (Wood, Laminate, Vinyl & Stone Flooring): ½ c. (120 mL) of soap in 3 gallons (12 L) of hot water. Dunk mop (microfiber, preferably) and wring thoroughly. On wood and laminate, avoid excess water and mop up wet areas.

All-Purpose Cleaning Spray: ¼ c. (60 mL) soap in a quart (1 L) of water in a spray bottle. Optional: For extra microbial punch, add ¼ tsp. (1.25 mL) tea tree essential oil.

Windows: 1 Tbsp. (15 mL) soap in a quart of water in a spray bottle. Spray and squeegee. Follow up with pure club soda, or half vinegar/ half water and squeegee.

Toilet: Predilute 1:4 with water in a squirt bottle. Add ¼ tsp. (1.25 mL) tea tree oil. For best results, empty toilet. Squirt bowl thoroughly, sprinkle baking soda on the brush, scrub bowl, let sit 10 minutes, turn water on, flush.

Other Uses:

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

Dog Washing: Wet dog thoroughly. Massage in enough soap to create a good lather. Really massage it in down to the skin. Your dog will thank you for it. (Amount varies based on size, hair type, and overall dirtiness.) Rinse thoroughly.

Cleaning Makeup Brushes: Wet the make-up brushes in water. Add 1-2 drops soap to the bristles. Massage in gently for 10+ seconds, then rinse. Repeat as needed until water runs clear.

Plant Spray for Bugs: 1 Tbsp. (15 mL) in a quart (1 L) of water. Optional: Add ½ tsp. (1.25 mL) cayenne pepper or cinnamon. Spray plants twice daily in the cool of the day until infestation clears.

Ant Spray (Not on Plants): ¼ c. (60 mL) Tea Tree Castile Soap in a quart (1 L) of water. (This concentration will burn plants.)

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

Download a one-page copy of this Castile Soap Dilution Cheat Sheet.

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Castile Soap Cheat Sheet

Dilute! Dilute! OK! But how much? Print this guide!


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Bec says:

Hi, just a quick query. Are the scented soaps also for all 18 uses, including the food wash? It is something I want to start doing, I just wanted to clarify first.

Lisa Bronner says:

Hi Bec- Yes, use whatever scent appeals to you most. With a thorough rinsing, there won’t be any scent or taste left of produce.

Jerry says:

Using hemp/eucalyptus liquid soap.
I’m not young, and have old man flaky skin.
90 days into using it, 88 days of flake skin & scalp gone!
May be the best ‘ body wash ‘ available.
Could not be more pleased.

Lisa Bronner says:

Hi Jerry- I’m so glad to hear our soap has been a help to you!

Frances says:

What would be the ratio to make sugar scrub, using 5# of granulated sugar. I love the way this soap smells and cleans.

How To Do Everything With Dr Bronner's - Hemp Store says:

[…] You can download Lisa Bronner’s beautiful cheat-sheet from her website here. […]

Maryam says:

Hi Lisa,

Thank you for this post!

When using for hand soap and mixing one part Castile soap with 3 parts water like you mentioned in the comments, how long would the hand soap be good for if I use distilled water?

Thank you very much!

Lisa Bronner says:

Hi Maryam- I’m glad this is helpful to you! The shelf life is about 2-3 weeks. Follow your nose here – if it is smelling off, then dump and remake. If you find you don’t go through it fast enough, mix-up a smaller batch.

Su says:

Dear Lisa,

First of all, thank you for coming up with all these videos and sharing everything about how to go green with your products. I only just came upon Dr. Bronner’s last week and I’m all the way in Taiwan.

Next I have a question : Can Castile soap & Sal Sud be used on mopping Marble floors??


Janet says:

Thank you for this blog.

Coupla questions:

1. I have a bottle of Dr. Bronner’s unscented liquid soap, but don’t remember if I ever opened it. How can I tell if this unscented liquid soap is no longer OK to use?

2. Can I use this soap as hand soap in a regular (i.e., non-foaming) pump bottle? If yes, how should I dilute it?

Many thanks for your help.

Lisa Bronner says:

Hi Janet- It’s great to hear you find the blog helpful. Our products have a guaranteed shelf life of 3 years. The manufacture date is etched on the packaging, typically just below the label. The first four numbers there are the Julian date. The first two digits refer to the year while the next three digits refer to the day of the year out of 365 total days. So, if the first five digits of a lot code are “20165,” the product was manufactured in 2020 on the 165th day of that year (June 13). You can also search online for a Julian date calendar for the specific year your bottle was manufactured in. If the soap does not smell bad, then it is good to go. I’ve heard many stories of people finding old bottles and using them just fine. For a hand soap, we do not recommend using our soaps in a regular soap dispenser as they can clog and squirt out unexpectedly in odd directions. They work beautifully in a foaming hand soap dispenser though. Use 1 part soap to 3 parts water.


Lisa Bronner

Green means life. “Going Green” is living in such a way to promote vitality and vibrancy in every sphere of life. Grab an idea to make your days healthier, simpler, and more beautiful at their core.

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Castile Soap Cheat Sheet

Dilute! Dilute! OK! But how much? Print this guide!