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Alcohol Dilution Calculator

mL

Result

Original Volume (mL)73.68
Water to Add (mL)26.32
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Alcohol Dilution Calculator The Alcohol Dilution Calculator tells you how much of a strong spirit and how much water to mix to reach a target alcohol strength. It uses the dilution rule C₁V₁ = C₂V₂, so original volume = (desired % × final volume) ÷ origin — free online calculator.

Formula

C1V1 = C2V2
  • Alcohol Dilution Calculator calculates its result from C2, V2. It uses the formula C1V1 = C2V2. Change any input to recalculate the result instantly.
  • The main inputs are Original Concentration %, Desired Concentration %, Final Volume. Enter them in the units and format shown in the calculator.
  • Use the units, labels and assumptions shown beside each input so the formula is applied consistently.
  • Changing any input above recalculates the result with the same calculation engine used by this page.

Example: Alcohol Dilution

Inputs
  • Original Concentration %: 95
  • Desired Concentration %: 70
  • Final Volume: 100 mL

Using C2 = 2, V2 = 3, the calculated result is 6.

Sample result: Calculating…

Frequently asked questions

What does the Alcohol Dilution calculate?

Alcohol Dilution Calculator The Alcohol Dilution Calculator tells you how much of a strong spirit and how much water to mix to reach a target alcohol strength. It uses the dilution rule C₁V₁ = C₂V₂, so original volume = (desired % × final volume) ÷ origin — free online calculator.

Which values should I enter?

Enter Original Concentration %, Desired Concentration %, Final Volume using the units and format shown beside each field.

What formula does this calculator use?

The calculator uses the following relationship: C1V1 = C2V2.

Why might my result differ from another source?

Results can differ when another source uses different units, rounding rules, conventions or assumptions. Compare the inputs and definitions before comparing results.

Does the result update automatically?

Yes. Changing an input updates the result using the same calculation engine shown on this page.

Page information

Updated: October 10, 2026