Field guide 01 · Brewing, measured
Understand what changes inside the glass.
Follow beer from grain to glass, check the numbers behind a batch, then practise the decisions. BrewMyBeer turns drink craft into useful steps you can explore at your own pace.
- 32
- interactive calculators
- 130
- recipe articles
- 07
- decision cases
The grain-to-glass guide
Meet Copper, your process guide.
01 Choose the base
Grain Malted grain brings starch, colour and the raw material for flavour.Choose the task in front of you
Read, measure, then make the call.
Understand a drink
Public guides explain the process before you start a learning game.
Use what you have
Match ingredients to a recipe and see what is missing.
Check a fermentation
Find the next useful measurement instead of guessing from bubbles.
Keep a better record
Print measurement sheets and source-linked teaching materials.
Daily competition · One round, one board
Take what you learn onto the field.
The ranked Arena draws six questions across beer, wine, spirits, cocktails, cider, mead and sake. Build a record through one server-graded round per UTC day, then compare an opt-in pseudonym on the public board.
- 01Study a trackShort, sourced lessons and decision cases.
- 02Play one roundSix questions, server graded, no paid advantage.
- 03Compare progressDaily, weekly and monthly opt-in standings.
Create an account when you are ready to play. Scores reward knowledge, never consumption.
Measure first
A number is useful when you know what moved it.
Each calculator shows the formula, a worked example and its limits. Start with the measurement closest to the decision you need to make.
Open the calculator bench →01 ABV calculator: original and final gravity Enter original and final gravity to get beer ABV and apparent attenuation. Uses (OG − FG) × 131.25, with a worked example and reading limits. 02 Hop substitution calculator for bittering additions Swap a bittering hop: enter the original grams and both alpha-acid percentages to get the replacement weight that keeps the same alpha-acid charge. 03 BU:GU ratio calculator: bitterness and gravity Divide IBU by original gravity points to get the BU:GU bitterness ratio. Enter OG and IBU, compare two recipes and see what the ratio cannot predict. 04 Pre-boil to post-boil gravity calculator Enter pre-boil volume, pre-boil gravity and post-boil volume to estimate post-boil gravity and litres evaporated, using the gravity-points method. 05 Original gravity calculator from a grain bill Estimate original gravity from grain weight in kg, average PPG, extract recovery and wort volume. Shows the recovered gravity points and each assumption. 06 Wort dilution calculator: water to reach target gravity Enter wort volume, current gravity and target gravity to get the litres of water to add and the final volume. Gravity-points method with an example. 07 Mash Water Calculator: Grain, Ratio and Dead Space Plan mash-water volume with clear units, a worked example and a quick learning challenge. 08 Sparge Water Calculator: Balance Your Brew-Day Volumes Calculate sparge water from your pre-boil target, mash volume, absorption and collection losses. 09 Fermenter Headspace Calculator: Capacity Minus Fill Calculate empty vessel volume from capacity and planned fill without unsupported gas or pressure predictions. 010 Adjunct calculator: gravity contribution Enter wort volume, the gravity increase in points and the fermentable’s PPG to get the kilograms of sugar, honey or extract to add. 011 Boil-off rate calculator Enter starting volume, ending volume and boil time to get your kettle’s boil-off rate in litres per hour, the volume lost and the loss per hour in %. 012 Brew day timeline planner Enter a start time plus your planned prep, mash, boil and cleanup minutes to get the total brew-day hours and an estimated finish time. 013 Brewing salt ion-addition calculator Enter water volume and grams of gypsum, calcium chloride and table salt to see the calcium, sulfate, chloride and sodium each addition adds, in ppm. 014 CO₂ volumes pressure calculator Convert a target carbonation level to keg pressure: enter beer temperature in °C and CO₂ volumes to get the approximate gauge pressure in PSI. 015 Cost per bottle calculator Enter ingredient and packaging costs, packaged volume and bottle size to get total batch cost, cost per bottle and cost per litre in one currency. 016 Fermentation schedule planning calculator Adjust a reference fermentation time for your actual temperature with a stated Q10 model. A planning estimate: confirm completion with gravity readings. 017 Forced carbonation calculator Find the regulator setting for force-carbonating a keg: enter beer temperature and target CO₂ volumes to get approximate PSI. Check vessel ratings first. 018 Grain bill builder: target gravity Enter target gravity, wort volume, average grain PPG and extract recovery to get the total grain weight in kg, with the gravity-points working shown. 019 Hop alpha-acid adjustment calculator New hop lot with a different alpha acid? Enter the recipe grams and both AA% values to get the adjusted weight that keeps the alpha-acid charge equal. 020 Hop utilisation and IBU calculator Enter boil gravity, boil time, alpha acids, hop grams and final volume to get Tinseth utilisation and the IBU contributed by one hop addition. 021 Hydrometer temperature correction calculator Enter the gravity you read, the sample temperature and your hydrometer’s calibration temperature in °C to get the temperature-corrected gravity. 022 Metric and US brewing volume converter Convert brewing volumes from litres to US gallons, US fluid ounces and millilitres. US units only, so a recipe never mixes US and imperial gallons. 023 Priming sugar calculator Enter beer volume, target CO₂ volumes and residual CO₂ to get the grams of glucose (corn sugar) to prime with before bottling, with the working shown. 024 Fermented refractometer correction calculator Correct a refractometer reading taken after fermentation: enter original and current Brix to get the corrected final gravity and an estimated ABV. 025 Wort colour blending calculator Blend two worts: enter each volume and its SRM to get the volume-weighted colour in SRM and the EBC equivalent for the combined batch. 026 Yeast pitching-rate calculator Enter wort volume, extract in °Plato and a pitch rate in million cells/mL/°P to get the billions of yeast cells to pitch for your batch. 027 Cocktail ABV calculator with ice dilution Work out the ABV of a mixed drink from each ingredient’s volume and label strength, then allow for water melted from ice when stirring or shaking. 028 ABV calculator from sugar, honey and juice Estimate starting gravity and potential ABV for mead, cider or wine from honey, table sugar and juice before you have a hydrometer reading. 029 Brewhouse and mash efficiency calculator Calculate mash or brewhouse efficiency from grain weight, average PPG, measured wort volume and gravity. See measured against potential gravity points. 030 SG to Plato and Brix gravity converter Convert specific gravity to degrees Plato or Brix and back for unfermented wort, juice or must, using a published SG–Brix polynomial. 031 Strike water temperature calculator Work out how hot to heat mash water from grain temperature, target mash temperature and water-to-grain ratio, in °C with °F alongside. 032 Beer calorie and carb calculator Estimate calories and carbohydrate per serving of homebrewed beer from original gravity, final gravity and serving size, with the formula shown.
The reference shelf
Classic cocktails and alcohol-free references.
Use the IBA reference quantities, scale the ingredients, and read why the technique matters.
R·01 Daiquiri Rum · Shake Three ingredients, one lesson in balancing a sour: spirit, citrus and sweetness. Read recipe →R·02 Negroni Gin · Build An equal-parts structure that connects bitterness, sweetness and dilution. Read recipe →R·03 Margarita Tequila · Shake Learn how a citrus liqueur contributes sweetness as well as aroma. Read recipe →R·04 Old Fashioned Whiskey · Build A compact study in seasoning a spirit with sugar, bitters and water. Read recipe →R·05 Mojito Rum · Build A lesson in handling herbs gently and adding carbonation at the end. Read recipe →R·06 Dry Martini Gin · Stir A spirit-led recipe that makes temperature, dilution and aroma easy to compare. Read recipe →R·07 Spice & Tonic Alcohol-free · Build A measured two-part highball built from a non-alcoholic botanical base and tonic water. Read recipe →R·08 Grove Fix Alcohol-free · Stir A non-alcoholic stirred reference combining a citrus base, syrup, bitter modifier and tea. Read recipe →
Eight source-linked drink references, plus a wider library of beer, wine and fermented-drink recipes.
Search all recipes →When a batch looks wrong
Check the evidence before changing the recipe.
A sweet finish, an odd gravity reading or a hop substitution can have more than one cause. Separate the measurement from the diagnosis.
Browse all guides →01 Sweet beer or stuck fermentation? Check the evidence first A practical sequence for diagnosing sweet beer: confirm gravity, check the recipe and yeast, compare readings over time and avoid premature packaging.02 Hydrometer vs refractometer for final gravity Understand density and refraction, why alcohol changes a refractometer reading, and how to check final gravity without unsupported accuracy claims.03 How to substitute hops: bittering, flavour and aroma Choose a hop replacement by its job in the recipe. Adjust bittering mass from the lot alpha acids and assess aroma separately instead of using a universal swap chart.04 Hop substitution chart Search a hop to see the substitutes our variety guides name, then open the guide for amounts and trade-offs. Bittering swaps scale by alpha acid.05 Yeast substitution chart for beer Beer yeast pairings our comparison guides cover, with each maker’s stated role. A deliberately small chart that says which pairs are not the same strain.
From answer to skill
Make the call. See what your choice changes.
Seven short cases cover beer, wine, spirits, cocktails, cider, mead and sake. Choose for a brief, then read the consequence. No real drink or ingredients are needed.
An account is required when you start playing.
Six learning pathsOpen Academy →
Beer recipe lab
Take one beer through the whole process.
Choose the grain, mash, boil, fermentation and conditioning decisions for a beer recipe, then inspect how those choices shape the result.