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Brewing calculators and calculation guides.
Choose a brewing calculation, see how it works, and use it to plan your next batch. Twenty-six interactive tools show their formula and limits; the guides explain the measurement behind them.
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48 tools and guides
Showing 48 of 48 tools and guides
ABV Calculator: OG to FG with Hydrometer Adjustment
For a common beer estimate, subtract final gravity from original gravity and multiply by 131.25. An OG of 1.050 and FG of 1.010 gives approximately 5.25% ABV.
Use calculator →Interactive toolBitterness Ratio (BU:GU) Calculator
BU:GU is IBU divided by original gravity points. At 30 IBU and OG 1.050, the calculation is 30 ÷ 50 = 0.60. Gravity units here are not ABV.
Use calculator →Interactive toolHop Substitution Finder: Replace Any Variety
Replacement weight = original weight × original alpha-acid percentage ÷ replacement alpha-acid percentage. Replacing 30 g of 6% hops with 9% hops gives 20 g as a starting estimate.
Use calculator →Interactive toolMastering Wort Dilution with Dilution & Gravity Calculator
For unfermented wort, final volume ≈ current volume × current gravity points ÷ target gravity points. Diluting 20 L at 1.060 to 1.050 requires about 4 L of water, giving 24 L total.
Use calculator →Interactive toolOriginal Gravity (OG) Calculator by Grain Bill
Wort gravity depends on grain potential, how much extract reaches your chosen measurement point and wort volume. Here, 5 kg of grain at 37 PPG, 75% recovery and 20 L gives approximately SG 1.058.
Use calculator →Interactive toolPre-Boil Gravity Calculator + Adjustments
If extract is retained while water evaporates, gravity points rise as volume falls. For 25 L at 1.040 reduced to 20 L, the estimate is 50 points, or SG 1.050.
Use calculator →Interactive toolFermenter Headspace Calculator
Use the inputs, worked example and stated assumptions.
Use calculator →Interactive toolMash Water Volume Calculator
Use the inputs, worked example and stated assumptions.
Use calculator →Interactive toolSparge Water Calculator (Fly + Batch)
Use the inputs, worked example and stated assumptions.
Use calculator →Interactive toolAdjunct Calculator: Sugar, Honey, DME for OG Boost
Estimate the mass of a fermentable needed for a planned gravity-point increase using its supplier potential.
Use calculator →Interactive toolBoil-Off Rate Calculator for Your Setup
Calculate evaporation as litres per hour from a measured starting volume, ending volume and boil duration.
Use calculator →Interactive toolBrew Day Timeline Planner
Add planned phases to a 24-hour start time to make a realistic brew-day finish estimate.
Use calculator →Interactive toolBrewing Salt Calculator (CaSO4, CaCl2, NaCl)
Estimate calcium, sulfate, chloride and sodium added by weighed gypsum, calcium chloride and sodium chloride.
Use calculator →Interactive toolCO2 Volumes Calculator by Beer Style
Estimate force-carbonation gauge pressure from beer temperature and a target CO₂ volume.
Use calculator →Interactive toolCost Per Bottle Calculator vs Commercial
Divide consistent batch and packaging costs by actual packaged volume and package size.
Use calculator →Interactive toolFermentation Schedule Predictor by Temp + Yeast
Apply a transparent temperature-planning model to a reference fermentation duration; confirm completion by measurement.
Use calculator →Interactive toolForced Carbonation Calculator (PSI by Temperature)
Estimate a force-carbonation pressure from temperature and target CO₂ volumes; verify all vessel limits independently.
Use calculator →Interactive toolGrain Bill Builder by Style and Target OG
Estimate total grain mass from target gravity, volume, potential and a stated recovery percentage.
Use calculator →Interactive toolHop Alpha Acid Adjustment Calculator
Adjust a bittering addition’s mass to hold its alpha-acid charge constant across two lot percentages.
Use calculator →Interactive toolHop Utilization Calculator by Boil Time
Use the Tinseth model to estimate a single hop addition’s utilisation and IBU contribution.
Use calculator →Interactive toolHydrometer Temperature Correction Calculator
Correct a specific-gravity reading from sample temperature to the hydrometer’s stated calibration temperature.
Use calculator →Interactive toolImperial to Metric Brewing Converter
Convert litres to US gallons, US fluid ounces and millilitres without mixing US and imperial gallons.
Use calculator →Interactive toolPriming Sugar Calculator by Style and Temperature
Estimate glucose for a target carbonation increase after allowing for residual dissolved CO₂.
Use calculator →Interactive toolRefractometer Calculator (Brix to SG, with Alcohol)
Correct a fermented refractometer reading with the original Brix value before estimating final gravity and ABV.
Use calculator →Interactive toolWort Color Blending Calculator
Calculate a volume-weighted colour estimate when combining two worts with stated SRM values.
Use calculator →Interactive toolYeast Pitching Rate Calculator
Calculate the cell target implied by wort volume, extract strength and a selected pitch rate.
Use calculator →Calculation guideABV Calculator: Optimize Alcohol Content in Homebrew
Read the method, key measurements and decisions behind this calculation.
Read guide →Calculation guideAlcohol By Weight (ABW) Calculator
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Read guide →Calculation guideBeer Calories Calculator Using ABV & Final Gravity
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Read guide →Calculation guideBoil-Off Rate Calculator for Different Kettles
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Read guide →Calculation guideBottle Carbonation with Priming Sugar Calculator
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Read guide →Calculation guideDIY Brewing Spreadsheet Setup: Build Your Brewing Calculator
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Read guide →Calculation guideGrain Absorption Rate Calculator for Efficiency
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Read guide →Calculation guideGuide to the Best Brewing Calculators Online for Perfect Homebrew
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Read guide →Calculation guideIBU Calculator: Optimizing Bitterness in Homebrew
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Read guide →Calculation guideKeg Line Balancing Calculator for Perfect Pours
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Read guide →Calculation guideLagering Time Calculator by Beer Strength
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Read guide →Calculation guideMash Water Calculator for Better Homebrewing
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Read guide →Calculation guideMastering Mash pH with pH Adjustment Calculator
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Read guide →Calculation guideOnline Calculators for Dilution and ABV: Essential Tools for Accurate Alcohol Content Management
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Read guide →Calculation guideReview of Brewing Calculators for India: Guide to Essential Homebrewing Calculation Tools
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Read guide →Calculation guideReview of Brewing Cost Calculators: Essential Tools for Brewery Profitability Analysis
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Read guide →Calculation guideReview of Homebrewing Calculators for Hops: Guide to IBU and Hop Utilization Tools
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Read guide →Calculation guideStrike Water Temperature Calculator and Best Practices
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Read guide →Calculation guideTrub Loss Calculator for Recipe Scaling
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Read guide →Calculation guideUnderstanding Beer Color SRM Calculator
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Read guide →Calculation guideWater Chemistry Calculator for Homebrewers
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Read guide →Calculation guideYeast Pitch Rate Calculator
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