$0.50/ounce Pure Non-Toxic castile soap is concentrated and needs to be diluted with water, but the exact ratio depends on what you're using it for. When it comes to beauty and personal care purposes—using it as a face wash, body wash, shampoo, shaving cream—the water that gets naturally mixed in during the process will be enough to dilute it and since it's non-toxic, your whole family can use it...it even works as a great dog shampoo.
For a multi-surface cleaner, mix 1/4 cup soap with one quart water. For a dish detergent, use one part castile soap to 10 parts water. For a floor cleaner, mix 1/2 cup soap with three gallons water. For a fruit and veggie wash, add one dash of soap to a bowl of water. For a laundry detergent, add 1/3 to 1/2 cup soap per load, and add 1/2 cup vinegar to the rinse cycle (more on why in a minute). For an insect-repellent for plants, mix one tablespoon soap with one quart water. It's not a great option for color-treated hair, as it can strip out the dye molecules. Also, you don't want to combine acids (vinegar, lemon juice) with castile soap. Castile soap is alkaline, so the two will essentially counteract one another and can result in a leftover film or residue on whatever you're trying to clean.
Organic castile soap is a blend of organic vegetable oils and natural essential oils and citric acid for stabilizer. The term "organic" applies to products that contain a minimum of 95% organic contents by weight.