Specific Gravity and Alcohol Table for Beers
Having taken the hydrometer reading you will see at once how much alcohol will be made by comparing the reading (specific gravity) with its potential alcohol by volume. To increase the reading add 2% oz. of sugar for each increase of 50 you require: i.e. 4t oz. for an increase of 100 and 6% oz. for an increase of 150 and so on.
| Specific Gravity | Potential Alcohol by Volume |
| 1.030 | 2.9% |
| 1.040 | 4.6% |
| 1.050 | 6.0% |
| 1.060 | 7.6% |
| 1.070 | 9.2% |
There is no need to go above these figures as 9% of alcohol is plenty for beers. The illustration on page 156 shows the hydrometer in a sample and registering a reading of 1.035.