Brix to Gravity Converter

Summary

Enter a Brix or specific gravity reading to instantly convert between the two scales and see potential ABV.

How it works

1. Measure your wort or must with a refractometer to get a Brix value, or with a hydrometer to get SG.
2. Select the direction: Brix to SG, or SG to Brix.
3. Enter your reading in the appropriate field.
4. The converter applies the standard polynomial formula: SG = 1 + (Brix / 258.6 − Brix² / 130,000 + Brix³ / 120,000,000).
5. Potential ABV is estimated from the Brix value using the simplified formula: ABV ≈ (Brix × 0.55) / 100 × 131.25.
6. Use the result as your original gravity (OG) input when fermenting.

Use cases

• Convert a refractometer Brix reading to SG for brewing software.
• Quickly check potential ABV before pitching yeast.
• Verify a wort gravity target when scaling a recipe.
• Cross-check hydrometer and refractometer readings for the same batch.
• Convert SG back to Brix to compare with refractometer measurements.
• Calculate sugar content of fruit juice or must for winemaking.
• Track gravity across multiple samples without switching tools.
• Convert between scales when following international homebrew recipes.

Frequently Asked Questions