What ProofLogic does
ProofLogic provides accurate, easy-to-use calculation tools for professional distillery production. From proofing and dilution to gauging, blending, proof gallons, bottling, specific gravity, and ABV — our calculators reference official TTB gauging table methodology so you can plan production with confidence.
TTB-Based Methodology
Calculations reference official TTB Gauging Manual tables and 27 CFR Part 30 algorithms, including Table 1, Table 4, and Table 7.
Spirit Dilution Calculator
Estimate water additions to reach target proof. Supports all four volume and weight input and output combinations.
Save & Reference
Save named calculations with notes. Free users save 1; Pro users save unlimited records with method version tracking.
Who ProofLogic is for
ProofLogic is built for craft and commercial distillers, distillery owners, production staff, compliance teams, and consultants who work with spirits production calculations. Whether you are proofing a new batch, calculating proof gallons for tax reporting, diluting spirits to bottling proof, or blending multiple barrels, ProofLogic provides the calculation tools you need.
Key calculator categories
ProofLogic organizes calculators by production workflow so you can find the right tool quickly.
Proof and Gauging
True proof, corrected proof and volume, and proof gallons by weight.
Dilution and Blending
Spirit dilution, cutting to proof or ABV, and blending calculations.
Fermentation and Specific Gravity
Potential ABV, Brix to SG, and temperature corrections.
Bottling and Packaging
Bottling volume and packaged contents for reporting.
International Alcohol Calculations
ABV from density and liters of absolute alcohol using CRA tables.
Unit Conversions
Temperature, weight, and volume conversions for spirits production.
Why accurate production calculations matter
Accurate calculations are essential for distillery operations. Proof determination affects tax liability, gauging records, bottling decisions, and regulatory compliance. Small errors in proof or volume can compound across production runs, leading to incorrect tax reporting, off-spec product, or wasted materials. ProofLogic helps you perform these calculations consistently and transparently, with clear references to the underlying methodology.
Free versus Pro access
Free Plan
- Cut to Proof calculator
- 50 calculations per month
- 1 saved calculation
- All 4 input/output modes
Pro Plan — $9/month or $99/year
- All calculators
- Unlimited calculations
- Unlimited saved calculations
- Calculation notes
Frequently asked questions
What is ProofLogic?
ProofLogic is a web application that provides professional distillery calculators for proofing, dilution, gauging, blending, proof gallons, bottling, specific gravity, ABV, and production conversions. It is designed for distillers, compliance teams, and DSP operators who need accurate, easy-to-use calculation tools.
Who should use ProofLogic?
ProofLogic is designed for craft and commercial distillers, distillery owners, production staff, compliance teams, and consultants who work with spirits production calculations. It is useful for anyone who needs to calculate proof, dilute spirits, determine proof gallons, or perform related distillery production math.
Are the calculators free to use?
ProofLogic offers a free plan that includes access to the Cut to Proof calculator with up to 50 calculations per month and one saved calculation. Pro plans are available for $9 per month or $99 per year and include unlimited calculations, unlimited saved calculations, and access to all calculators.
Do the calculators use official TTB tables?
Several ProofLogic calculators reference TTB gauging tables, including Table 1 for proof temperature correction, Table 4 for weight-to-volume conversion, and Table 7 for proof and volume correction. The use of TTB table methodology does not mean that ProofLogic is approved, endorsed, certified, or operated by the Alcohol and Tobacco Tax and Trade Bureau or any other government agency.
Can I save my calculations?
Yes. Free users can save one named calculation with notes. Pro users can save unlimited calculations. Saved calculations include input values, output values, unit system, method version, and table source metadata for future reference.
Is ProofLogic a compliance tool?
No. ProofLogic is a calculation aid for production planning and estimation. It is not an official compliance system, tax filing platform, or substitute for approved gauging procedures. All results must be independently verified using calibrated instruments and approved methods before being relied upon for production, compliance, tax, or reporting decisions.
What types of distillery calculations are available?
ProofLogic provides calculators for true proof, corrected proof and volume, proof gallons by weight, spirit dilution, spirit blending, potential ABV, Brix to specific gravity, specific gravity temperature correction, bottling volume, packaged contents, alcohol by volume from density, liters of absolute alcohol, unit conversions, and shelf price and margin calculations.
Production Planning Tool Only. ProofLogic provides estimates for production planning purposes. Results must be independently verified using calibrated instruments and approved gauging procedures. Users remain responsible for compliance with all applicable federal, state, and local requirements.
Ready to calculate?
Create a free account and start using ProofLogic today.