Alcohol Proof Calculator – Convert ABV to Proof Easily

Calculation Mode

Volume Unit

Alcohol By Volume (ABV %)

Please enter a valid number.

Total Volume (Optional: For Standard Drinks & Proof Gallons)

Please enter a valid volume.

Initial Volume

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Initial Proof

Please enter a valid proof.

Volume of Water/Mixer Added

Please enter a valid volume.

Spirit Report

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U.S. Alcohol Proof

0.0

Standard

Alcohol By Volume

0.0%

Standard US Drinks

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Proof Gallons (Tax)

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UK Proof (Historical)

0.0

Scientific Note: When mixing ethanol and water, the molecules bind tightly. The actual final volume will be roughly 2-4% less than the simple sum of the two liquids (Volume Contraction).