ABV Calculator for Beer, Wine, & Spirits

Introduction

Alcohol by Volume (ABV) is the standard measure of how much alcohol is contained in a beverage. It’s crucial for brewers, winemakers, and distillers to know the ABV to ensure consistency, label accuracy, and compliance with regulations. This calculator uses common formulas to convert Original Gravity (OG) and Final Gravity (FG) readings into ABV measurements, and can adjust for dilution if water is added to the batch.

Usage Guide

1. Enter the Original Gravity (OG) of your batch, as measured with a hydrometer.
2. Enter the Final Gravity (FG) after fermentation.
3. If you diluted the batch, input the dilution percentage.
4. Click Calculate ABV to see the resulting Alcohol by Volume percentage.

Calculation Method

The ABV is calculated using the formula:

ABV (%) = (OG – FG) × 131.25 × (1 – dilution/100)

This formula accounts for the gravity differential and any added water dilution.

FAQs

1. Why use OG and FG?

Original and Final Gravity measure the density of the wort before and after fermentation, indicating how much sugar has been converted to alcohol.

2. What is a good ABV range?

Beer typically ranges from 4–8% ABV, wine from 11–15%, and spirits often exceed 40% after distillation.

3. How accurate is this tool?

Accuracy depends on your hydrometer readings. Proper temperature correction improves precision.

4. Can I calculate cider or mead ABV?

Yes—OG/FG method works for any fermented beverage.

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Discover additional brewing and fermentation calculators at Explore more tools.

6. Disclaimer

This calculator provides estimates. Always use calibrated instruments and consult official guidelines for labeling and compliance.