Recipe Design Calculators

Great homebrew starts with a well-designed recipe, and these calculators help you plan every aspect before you heat a drop of water. The recipe scaling calculator is one of the most-used tools here — whether you are adapting a 19-litre American recipe to a 23-litre UK batch or scaling down a commercial clone to a small test batch, it adjusts all grain, hop and yeast quantities proportionally. The style guidelines calculator lets you check your recipe parameters against BJCP guidelines, which is invaluable if you are entering UK homebrew competitions organised by clubs or the National Homebrew Competition.

Understanding your brew system's losses is critical for hitting your numbers on brew day. The batch size calculator accounts for dead space, trub loss, boil-off and transfer losses to predict your actual volume into the fermenter. Use the boil volume calculator and pre-boil gravity calculator together to determine exactly how much wort you need in the kettle and what gravity it should be before the boil concentrates it. The efficiency calculator then helps you track your brewhouse efficiency over multiple batches, so you can refine your process and hit targets consistently.

For more advanced techniques, the blending calculator is perfect for blending a strong and a mild beer to create a particular gravity or flavour profile — a traditional British practice seen in styles like old ale. The dilution calculator handles the reverse, adding water to reduce a too-strong wort to your target gravity. And if you have tasted a commercial beer you love — perhaps a classic Fuller's ESB or a Timothy Taylor's Landlord — the clone recipe calculator helps you reverse-engineer the recipe from known ABV, colour and bitterness parameters, giving you a solid starting point for your own version.