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ABV Calculator
Estimate alcohol by volume from original and final specific gravity readings.
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Alcohol & ABV
Understand alcohol by volume from hydrometer readings, estimate potential alcohol before fermentation, and make careful dilution plans. Results are estimates: measurement temperature, fermentable composition, and process losses all matter.
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6 calculators
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Alcohol Dilution Calculator
Estimate the water needed to bring a measured alcohol solution to a target strength.
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Potential Alcohol Calculator
Estimate the alcohol potential represented by a starting specific-gravity reading.
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Proof Calculator
Convert alcohol by volume to US proof and back.
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Brix to SG Converter
Convert an approximate sucrose Brix reading to specific gravity.
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SG to Plato Converter
Convert specific gravity to an approximate degrees Plato extract reading.
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Related guides
Guide
How to Measure Alcohol Content at Home
Learn what hydrometer readings can tell you about fermentation strength, and where common homebrew estimates fall short.
Guide
Understanding Specific Gravity
A practical introduction to gravity readings, hydrometers, temperature correction, and fermentation progress.
Guide
Brix vs Specific Gravity
Compare two common ways of describing dissolved extract and learn when a conversion is only an estimate.
Guide
How Much Sugar to Add to Wine
Estimate a sugar adjustment from measured gravity, then make small additions and verify the result.
Guide
How to Use a Hydrometer
A step-by-step guide to taking repeatable gravity readings with a brewing hydrometer.
Guide
How Fermentation Works
Learn the basic role of yeast, fermentable sugars, temperature, and process control.
Guide
How to Calculate Alcohol Dilution
Use a simple strength-and-volume relationship to estimate dilution, then verify the blend with measurement.
Guide
Why Did My Beer Finish at a Higher Gravity?
Troubleshoot a beer that finishes sweeter or denser than expected by checking the recipe, mash, yeast, and readings.
Guide
How to Understand ABV and Proof on Spirit Labels
Learn what alcohol by volume means and how the US proof convention relates to it.