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Dilution Calculator

The Dilution Calculator is a free dilution and ratio tool in the SoapBox tools suite. It works out how much concentrate and solvent to mix for a target strength — a common need in soap-making, skincare, cleaning solutions and the lab bench.

What it does

• Concentration (C₁V₁ = C₂V₂) — given a stock concentration, a target concentration and a target volume, it returns how much stock and how much solvent to combine. For example, making 500 mL of 50% solution from 70% stock needs about 357 mL of stock topped up with about 143 mL of solvent.
• Ratio (1:N) — a "1 part concentrate to N parts water" mix (such as a 1:10 cleaner) resolved into concrete amounts for a target total volume.
• Essential-oil percentage — a target dilution percentage in a carrier volume, converted to millilitres of essential oil, an approximate drop count (about 20 drops per millilitre) and grams (using a typical essential-oil density of about 0.92 g/mL). These are estimates and the tool says so; the drop rate and density can be overridden in the JSON API for a specific oil.

How to use it

Choose the mode, enter the numbers, and the result updates as you type. It runs entirely in the browser with no account and no data leaving the device. A JSON API is available at /api/dilute.

See also

• Dosing in Liquids
• Concentration Arithmetic and Serial Dilution
• SoapBox Tools
• Soap Calculator
• Percentage Calculator

Sources

• The dilution equation C₁V₁ = C₂V₂ is standard chemistry; drops-per-millilitre and essential-oil density are common rule-of-thumb reference values.

Coverage

Describes the SoapBox Dilution Calculator and its three modes (C1V1=C2V2 concentration, 1:N ratio mixing, and essential-oil percentage to drops and grams).

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