Coffee Brewing Calculators & Tools
Free, practical calculators for home brewing — solve a coffee ratio, pick a grind size, time a pour-over bloom and brew, check your extraction, and estimate caffeine.
Coffee-to-Water Ratio Calculator
Solve any brew ratio from any two values — dose, water, or ratio — with quick presets for espresso, moka pot, French press, pour-over, auto-drip, and cold brew.
Grind Size Guide
Pick the right grind for your brew method and get its particle-size range in microns plus a typical brew time.
Brew Timer
Build a bloom-and-pulse pour-over schedule from your dose and ratio, with cumulative water targets and timestamps.
TDS & Extraction Yield Calculator
Turn a refractometer TDS reading into Extraction Yield using the SCA brewing-control formula, and see it against the 18-22% gold-cup range.
Caffeine Estimate Calculator
Estimate the caffeine in your cup from the dry coffee dose, with a realistic range rather than a false-precision single number.
Bloom Timer
Get a bloom water amount and recommended bloom time, adjusted for how many days your beans have been off roast.