If you brew beer, make wine, or ferment kombucha, a Refractometer is one of the most important tools you can own. Unlike a Hydrometer, refractometers measure sugar concentration in liquids using only a few drops of sample, giving you instant readings during brewing or fermentation.

Homebrewers, winemakers, and kombucha brewers often use refractometers to track Brix, Plato, or Specific Gravity (SG). Knowing these values lets you calculate potential alcohol, track fermentation, and ensure consistent beer or wine quality.

In this guide, we’ll cover:

• the best refractometers for home brewing and wine making

• tools for beer, wine, cider, kombucha, and low-ABV beverages

• how Brix, Plato, and SG scales work

• a Brix ↔ SG ↔ Plato Conversion Calculator

• tips on choosing the right instrument

We’ll also highlight the BREWfractometer family from National Industrial Supply, which are designed specifically for brewing.

Quick Comparison: Best Brewing Refractometers

Understanding Refractometer Measurements in Brewing

Brewing refractometers measure sugar concentration using three main scales:

Brix

The Brix Scale measures sugar concentration as a percentage by weight.
Example: 10° Brix = 10 grams of sugar per 100 grams of solution.
Used in beer, wine, kombucha, and cider.

Plato

Many professional brewers prefer Plato Scale, which expresses wort extract as a percentage.
Example: 12° Plato ≈ typical pale ale wort, 20° Plato ≈ strong beer.

Plato is common in commercial breweries and brewing textbooks.

Specific Gravity (SG)

Specific gravity compares the density of wort to water. Typical ranges:

• 1.035 – light beer

• 1.050 – average ale

• 1.080+ – strong beer

Many brewing refractometers include SG scales for direct readings without conversions.

BREWfractometer Family Overview

The BREWfractometer family is designed to cover nearly every brewing scenario:

1. BREWfractometer – Standard dual-scale model (0–32 Brix / 1.000–1.140 SG)

2. BREWx BREWfractometer Extreme – Extended high-gravity range (0–40 Brix / 1.000–1.180 SG)

3. BREWfractometer LA – Low-Brix precision for kombucha, low-ABV beer, and hard seltzer

4. BREWfractometerPSG – Professional Plato + SG measurement for commercial and recipe-focused brewing

These tools are designed with durable aluminum housing, automatic temperature compensation, and easy calibration to ensure accurate and repeatable readings.

Best Refractometers for Home Brewing & Wine Making

1. BREWfractometer – Best Overall for Homebrewers

• Scales: Brix + SG

• Range: 0–32 Brix / 1.000–1.140 SG

• Best for: Beer, wine, cider, general homebrewing

• Highlight: Brewing-specific dual scale, durable metal body, ATC

2. BREWx BREWfractometer Extreme – High-Gravity Brewing

• Scales: Brix + SG

• Range: 0–40 Brix / 1.000–1.180 SG

• Best for: Imperial stouts, barleywine, mead

• Highlight: Extended range for high-sugar worts, LED daylight plate

3. BREWfractometer LA – Low Gravity & Kombucha

• Scales: Low-range Brix

• Best for: Kombucha, hard seltzer, low-alcohol craft beers

• Highlight: High precision at very low sugar levels

4. BREWfractometerPSG – Professional Plato Measurements

• Scales: Plato + SG

• Best for: Serious homebrewers, brewing schools, commercial breweries

• Highlight: Direct Plato readings, recipe development, lab-quality optics

5. Northern Brewer Dual-Scale Refractometer

• Scales: Brix + SG

• Best for: Beginner brewers

• Highlight: Affordable, widely available, easy to calibrate

6. Atago PAL-1 – Digital Option

• Scales: Brix

• Best for: Professionals, laboratories, wineries

• Highlight: ±0.2 Brix accuracy, digital display, waterproof

7. VEE GEE Wort Refractometer – Lab Optical

• Scales: Brix + SG

• Best for: Brewing labs, education, quality control

• Highlight: Durable optical design, high readability

8. Fermentaholics Dual-Scale Refractometer – Budget Option

• Scales: Brix + SG

• Best for: Beginners, hobbyists

• Highlight: Low cost, portable, entry-level design

Brix ↔ SG ↔ Plato Conversion Calculator for Brewers

Accurate conversion between Brix, Plato, and SG is essential for calculating potential alcohol, mash efficiency, and recipe formulation. Use the formulas below or a refractometer-specific calculator.

Approximate Formulas:

• Brix → SG:
  SG = 1 + (Brix / (258.6 – ((Brix / 258.2) * 227.1)))

• Brix → Plato:
  Plato ≈ Brix * 0.961

• SG → Plato:
  Plato ≈ ((SG – 1) * 1000) / 4 (simplified approximation)

How to Use:

1. Measure sugar content with your refractometer.

2. Enter the reading in the calculator.

3. Get direct conversions to Plato or SG for recipe adjustment.

Tip: When measuring fermented beer, apply an alcohol correction formula because ethanol affects light refraction.

Refractometer vs Hydrometer

Note: Many brewers still use hydrometers for final gravity after fermentation.

How to Choose the Best Brewing Refractometer

Essential Features

• Dual scale: Brix, Plato, or SG

• Automatic Temperature Compensation

• Durable aluminum or metal housing

• Clear, high-contrast optical prism

• Easy calibration

Advanced Features

• Extended Brix/Plato range for high-gravity worts

• LED illumination or digital display

• Long-term durability and warranty

Frequently Asked Questions (FAQ)

Q1: What is the best refractometer for home brewing?

• The BREWfractometer is ideal for homebrewers because it provides both Brix and SG readings, is durable, and designed specifically for brewing.

Q2: Can I use a refractometer for kombucha?

• Yes. The BREWfractometer LA is optimized for low-sugar beverages, including kombucha and low-ABV brews.

Q3: Do professional brewers use Plato or Brix?

• Most professional breweries use Plato. The BREWfractometerPSG provides direct Plato readings alongside SG for accurate recipe formulation.

Q4: Is a refractometer better than a hydrometer?

• For brew-day measurements, yes. Refractometers require less sample and give instant results. Hydrometers are still useful for final gravity readings.

Q5: How do I convert Brix to SG or Plato?

• Use the Brix ↔ SG ↔ Plato Conversion Calculator formulas provided above, or use a brewing spreadsheet for automated conversions.

Interactive Brix ↔ SG ↔ Plato ↔ Alcohol Correction Calculator

Convert sugar content, wort density, and potential alcohol in one tool.

Final Recommendations