Brix to Grams of Sugar Calculator

This calculator converts a Brix measurement—the percentage of dissolved solids (mostly sugar) in a liquid—into the actual grams of sugar present in a given volume or weight of that liquid. You enter the Brix value and the amount of liquid (in milliliters or grams), and the calculator returns the grams of sugar. It is a practical tool for homebrewers, winemakers, and anyone measuring fruit juices or syrups.

Formula

The calculator uses the straightforward definition of Brix: 1 °Bx means 1 gram of sucrose per 100 grams of solution. The formula is:

Sugar (g) = (Brix / 100) × Volume (mL) × Density (g/mL)

Where:

• Brix (°Bx) – the percentage of dissolved solids, measured by a refractometer or hydrometer.
• Volume (mL) – the amount of liquid you have.
• Density (g/mL) – the mass per unit volume of the liquid. For pure sucrose solutions, density varies slightly with concentration, but for most practical purposes, a value of 1.0 g/mL is used. The calculator assumes 1.0 g/mL, which is accurate to within a few percent for juices and musts.

If you measure your liquid by weight (grams) instead of volume, the formula simplifies to: Sugar (g) = (Brix / 100) × Weight (g) because the density cancels out.

Worked Example

Using the default values: Brix = 20 °Bx, Volume = 1000 mL.

1. Convert Brix to a decimal: 20 / 100 = 0.20
2. Multiply by volume: 0.20 × 1000 mL = 200
3. Multiply by density (1.0 g/mL): 200 × 1.0 = 200 g

So, 1000 mL of a 20 °Bx solution contains approximately 200 grams of sugar. This matches the calculator’s output.

What Brix Actually Measures

Brix (symbol °Bx) is a scale named after Adolf Brix, a 19th-century German scientist. It measures the percentage of sucrose by weight in a solution. A 10 °Bx solution is 10% sugar by weight—meaning 10 grams of sugar in 100 grams of solution. The scale is calibrated with pure sucrose, but in practice, fruit juices, wine musts, and other liquids contain other dissolved solids like acids, minerals, and pectin. A refractometer measures the refractive index of the liquid, which correlates with total dissolved solids, not just sugar. So the Brix reading is an approximation of sugar content, not an exact measurement.

For example, a ripe grape must might read 24 °Bx, but the actual fermentable sugar content could be slightly lower because acids and tannins also contribute to the refractive index. However, for most home and small-scale applications, the difference is negligible.

How to Measure Brix

To use this calculator, you first need a Brix reading. There are two common tools:

• Refractometer – A handheld optical device that measures how light bends through a drop of liquid. It is quick, requires only a few drops, and is the standard for measuring Brix in fruit juices and wine must. Models with automatic temperature compensation (ATC) are recommended for accuracy.
• Hydrometer – A glass float that measures specific gravity. You convert the specific gravity reading to Brix using a chart or formula (Brix ≈ 261.3 × (1 – 1/specific gravity)). Hydrometers are common in homebrewing but require a larger sample and temperature correction.

When measuring, ensure the liquid is at the temperature the instrument is calibrated for (usually 20 °C). If not, apply the correction factor specific to your device.

Common Mistakes and Misconceptions

One frequent error is confusing Brix with specific gravity. They are related but not the same. Brix is a percentage by weight; specific gravity is a density ratio. Another mistake is ignoring the density of the liquid. If you measure 1000 mL of a 20 °Bx solution, you are actually measuring about 1020 grams of liquid, not 1000 grams. The difference is small (2%), but for large volumes it can matter. This calculator uses a density of 1.0 g/mL, which is fine for most purposes, but if you need high precision, use the weight-based formula instead.

Also, remember that Brix measures dissolved solids, not just sugar. In fermented beverages, alcohol also affects the reading. After fermentation, a hydrometer reading of 0 °Bx does not mean zero sugar; it means the alcohol and other solids balance out. For finished wines, use a different method to measure residual sugar.

Why Convert Brix to Grams of Sugar?

There are several practical reasons you might need this conversion:

• Recipe scaling – If a recipe calls for a specific amount of sugar in a fruit juice or syrup, you can adjust the volume to hit that target.
• Nutritional labeling – If you are making a product and need to know the sugar content per serving, this conversion helps.
• Fermentation control – Knowing the grams of sugar in your must helps you estimate the potential alcohol yield. Roughly, 17 grams of sugar per liter produces 1% alcohol by volume.
• Comparing fruits – When deciding which fruit to use for wine or jam, the Brix reading tells you which is sweeter, and the gram conversion tells you how much sugar you are actually dealing with.

Limitations and Precision

This calculator provides an estimate, not an exact measurement. The main limitations are:

• Non-sugar solids – Brix includes acids, minerals, and other compounds, so the true sugar content may be slightly lower.
• Density assumption – Using 1.0 g/mL is an approximation. For a 20 °Bx solution, the actual density is about 1.02 g/mL, which would give 204 grams instead of 200. The error grows with higher Brix.
• Temperature effects – Refractometer readings are temperature-sensitive. If you measure a hot liquid, the reading will be off unless your device has ATC.

For home winemaking and brewing, this level of accuracy is usually sufficient. For commercial or scientific applications, you should use a more precise method like HPLC or a density meter.

Frequently Asked Questions

How many grams of sugar are in 1 liter of 10 °Bx juice?

Using the formula: (10/100) × 1000 mL × 1.0 = 100 grams. So, 1 liter of 10 °Bx juice contains about 100 grams of sugar.

Is Brix the same as sugar content?

Not exactly. Brix measures total dissolved solids, which includes sugars but also acids, salts, and other compounds. In most fruit juices, the majority of dissolved solids are sugars, so Brix is a good approximation, but it is not an exact sugar measurement.

Can I use this calculator for honey?

Honey has a very high Brix (around 80 °Bx), but it also contains water and other solids. The calculator will give you the total dissolved solids, which is mostly sugar, but the density assumption of 1.0 g/mL is less accurate for honey (actual density is about 1.4 g/mL). For honey, it is better to measure by weight and use the weight-based formula.

How do I convert Brix to specific gravity?

A common approximation is: Specific Gravity = 1 + (Brix / (258.6 – (Brix / 258.2) × 227.1)). Or use the simpler linear formula: SG = 1 + (Brix / 250). For homebrewing, many hydrometers have a Brix scale already.

What is the difference between Brix and Plato?

Plato (°P) is very similar to Brix, but it is calibrated for brewing wort, which contains non-fermentable dextrins. For most purposes, 1 °Bx ≈ 1 °P. The difference is less than 0.1% in typical ranges.

Does temperature affect the Brix reading?

Yes. Refractometers are calibrated to a specific temperature (usually 20 °C). If your sample is warmer or cooler, the reading will be off. Many modern refractometers have automatic temperature compensation (ATC), but if yours does not, you need to apply a correction table.

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in brix | Brix value | °Bx | 20 | 0 | 100
in vol | Liquid volume | mL | 1000 | 0 | 100000
out sugar | Sugar content | grams | (brix / 100) * vol * 1.0 | 1