All Brewing Tools
ABV Calculator
Calculate alcohol by volume from gravity readings for homebrewing
Beer Color (SRM) Calculator
Estimate beer color from your grain bill using Morey's formula with a live color swatch
Beer Recipe Scaler
Scale homebrew recipes between batch sizes — grains, hops, water, yeast, and extras adjusted automatically
Boil-Off / Dilution Calculator
Calculate how boiling concentrates wort or how much water to add to hit your target gravity
Brewhouse Efficiency Calculator
Measure mash, brewhouse, and lauter efficiency for your all-grain homebrew batches
Gravity Unit Converter
Bidirectional conversion between Specific Gravity, Brix, and Plato for brewers and winemakers
Hydrometer Temperature Correction
Correct specific gravity readings for temperature differences from hydrometer calibration
IBU Calculator
Calculate hop bitterness for your homebrew using the Tinseth formula
Keg Carbonation Calculator
Calculate the CO2 pressure needed to force-carbonate kegged beer to your target carbonation level
Mead Calculator
Calculate honey amounts, estimated ABV, yeast pairing, and nutrient schedules for your mead batch
Priming Sugar Calculator
Calculate the right amount of priming sugar for perfect carbonation in your homebrew beer
Strike / Mash Water Calculator
Calculate strike water temperature, volume, and infusion steps for all-grain brewing
Yeast Starter Calculator
Calculate the right yeast starter size for proper pitch rate in your homebrew beer
Brewing Calculators on FastTools are free, browser-based tools designed for homebrewers at every level. Every calculator runs entirely in your browser — your recipes and data never leave your device.
Whether you're formulating an all-grain recipe, dialing in carbonation, or building a yeast starter, these tools give you fast, accurate answers without signups or downloads.
Frequently Asked Questions
Are these brewing calculators free?
Yes, every tool is completely free to use with no signup, no account, and no hidden fees.
Is my data safe?
Absolutely. All calculations run locally in your browser. No data is sent to any server or stored anywhere.
Do I need to create an account?
No. Every tool works instantly with no registration required. Just open and start using.