Brewing Calculator

Brewing Calculator is a focused workbench for adult homebrewers who want to work from their own measurements. Enter the values for a batch and see labeled estimates alongside the equations and assumptions behind them.

Free calculators include:

• Gravity and ABV from your OG and FG readings
• Dilution and boil-off estimates
• Linear scaling of a quantity you enter
• Tinseth IBU and Morey SRM estimates from your inputs

The core calculations work offline and do not require an account. Results update when you change an input. These are simplified estimates, not measurements or safety guidance; review the displayed assumptions before using a result.

Lifetime Pro is an optional one-time purchase for people who want to keep a local batch library. Save and edit batches, duplicate one to explore a variation, compare two saved batches, and export or import JSON files that you choose through Android. Free calculations remain available without the upgrade.

Your draft and saved records stay in app-private storage on your device unless you choose to export a file. The app has no ads, PatchMedia analytics, account, or cloud sync. Google Play handles purchase and restore. Learn more in the privacy policy: https://patch-media.com/privacy/brewing-calculator/

Recent changes:
First production release of Brewing Calculator: offline homebrew batch math for gravity, dilution, boil-off, scaling, IBU, and SRM, with clear assumptions and validation.