Original gravity is a measure of the sugars dissolved in the water in your unfermented wort. It is typically measured with **a hydrometer or refractometer in the fermenter** when brewing is complete but before fermentation has started.

Contents

- 1 How do you calculate the original gravity of beer?
- 2 What is original gravity of beer?
- 3 How do you read the original gravity?
- 4 How do you measure specific gravity?
- 5 How do you calculate specific gravity?
- 6 What if my original gravity is too high?
- 7 Is beer more dense than water?
- 8 What is a gravity point?
- 9 How do you measure alcohol without real gravity?
- 10 What gravity should I bottle beer at?
- 11 Why specific gravity is measured?
- 12 What is specific gravity equal to?
- 13 What units are specific gravity?

## How do you calculate the original gravity of beer?

The Original Gravity refers to the gravity of the wort pre-fermentation and the Final Gravity refers to the Gravity post fermentation. Then the Recipe Potential Original Gravity can be calculated by multiplying the GU by the post-boil volume in gal.

## What is original gravity of beer?

Original Gravity (OG), sometimes called original extract, is a measure of the solids content originally in the wort, before alcoholic fermentation has commenced to produce the beer. OG is one of the major measurements used by brewers to determine the future alcohol content of a beer fermented from a particular wort.

## How do you read the original gravity?

It’s read as a sequence of numbers that starts with the number one followed by a decimal to the thousandth place, something like this: 1.052. A gravity reading taken just prior to yeast being added, or pitched, is referred to as the original gravity (OG).

## How do you measure specific gravity?

The best way to measure specific gravity is to weigh a container and record its weight, then weigh the container full of water and full of the liquid of unknown specific gravity. Subtract the weight of the container from each weight and divide the weight of the liquid being measured by the weight of the water.

## How do you calculate specific gravity?

The formula for specific gravity, given that the reference substance is water, is the density of the object divided by the density of the water.

## What if my original gravity is too high?

If the gravity is too high, dilute it by adding boiled or sterile water: This time we’ll assume our target was 1.056 but we overshot and came in with a gravity of 1.064, again using a 5 gallon batch. We’ll use the fact that the number of points times volume should be a constant to do the dilution.

## Is beer more dense than water?

Its specific gravity is always higher than water because it contains a lot of dissolved sugars. When the beer is finished, the specific gravity is always less than when it started, because some of the sugars have been converted into alcohol, which is less dense than water (0.79 kg/L).

## What is a gravity point?

Gravity is a downward pull or force that the earth exerts on your body. Your centre of gravity is the point where the mass of the body is concentrated. It is point at which the combined mass of the body appears to be concentrated.

## How do you measure alcohol without real gravity?

Nate42: A combination of a refractometer and a hydrometer can be used to determine % alcohol from a finished beer, no knowledge of OG required.

## What gravity should I bottle beer at?

As a guide, the gravity of a beer should drop about 75 per cent during fermentation, so a wort with a gravity of 1.040 should ferment to a beer of a gravity of about 1.010.

## Why specific gravity is measured?

The term “Specific Gravity” (SG) is used to define the weight or density of a liquid as compared to the density of an equal volume of water at a specified temperature. The temperature used for measurement is usually 39.2^{o}F (4^{o}C), because this temperature allows water to assume its maximum density.

## What is specific gravity equal to?

Specific gravity is defined as the ratio of the density of the solid part of a material to the density of water at 20°C. Typically, the specific gravity of soils is in the range 2.60 to about 2.80.

## What units are specific gravity?

Specific gravity is a dimensionless quantity; that is, it is not expressed in units. To find the sp gr of a solid or liquid, you must know its density in kilograms per meter cubed (kg/m^{3}) or in grams per centimeter cubed (g/cm^{3}). Then, divide this density by the density of pure water in the same units.