Original Gravity (OG): Final Gravity (FG): Temperature (Celsius): Calculate ABV Enter values above How It Works The ABV calculator uses the formula: ABV = (OG – FG) * 131.25. However, since hydrometers are calibrated to 15.5°C, a temperature adjustment is …
John Brewster
John Brewster
John Brewster is the homebrewer and writer behind BrewMyBeer — over a decade of all-grain brewing, 80+ BIAB batches, and 1,000+ guides on fermentation science, water chemistry, hops, yeast, and homebrewing equipment. Every guide is written from genuine hands-on experience.
I’ve always been fascinated by the complexity and elegance of Belgian Tripel, a style that showcases the brewer’s skill and attention to detail. With its rich history and distinctive characteristics, Belgian Tripel is a beer that can be both challenging …
I’ve been brewing kombucha at home for years, and I’m still amazed by the numerous health benefits and delicious flavors this fermented tea has to offer. As a homebrewer, I’ve experimented with various recipes, techniques, and ingredients to perfect my …
I still remember my first encounter with chocolate malt – it was a rich, velvety stout that left me wondering what sorcery had created such a deep, complex flavor profile. As I delved deeper into the world of homebrewing, I …
Temperature (F): Desired Volumes of CO2: Calculate Enter values above How It Works The forced carbonation calculator uses the formula: PSI = (Desired Volumes of CO2 * (Temperature in F – 32) * 0.5552) + 14.7. This formula calculates the …
I’ve always been fascinated by the crisp, refreshing flavor of a well-brewed German Pilsner. As a homebrewer, I’ve spent years perfecting my German Pilsner recipe, and I’m excited to share my knowledge with you. With its rich history and strict …
- Beer Brewing
How to Brew Märzen / Oktoberfest: Recipe and Style Guide
by John Brewster 8 minutes readI’ve always been fascinated by the rich, malty flavors of Märzen and Oktoberfest beers. As a homebrewer, I’ve spent countless hours perfecting my recipe and technique to capture the essence of these traditional German styles. In my experience, brewing a …
Original Gravity: Final Gravity: Target IBU: Alpha Acid Percentage: Boil Time (minutes): Boil Volume (gallons): Hop Weight (ounces): Calculate Enter values above How It Works The hop utilization calculator uses the Tinseth formula to estimate the utilization of hops in …
- Equipment & Tools
The Beginners Guide to All-Grain BIAB (Brew in a Bag)
by John Brewster 8 minutes readBIAB (Brew in a Bag) was the method that finally removed every barrier to all-grain homebrewing for me — before discovering it, all-grain seemed to require a three-vessel system (HLT, mash tun, brew kettle), a pump, and a dedicated brewing …
- Beer Brewing
Brewing with Fruit Purées: How to Avoid Secondary Fermentation Messes
by John Brewster 7 minutes readFruit purée additions to secondary fermentation taught me that the worst outcome in homebrewing is opening a fermenter lid to find it coated in fermenting fruit foam that has erupted through the airlock — a lesson I learned once with …