Coffee Brewing Calculators

Great coffee is a physics problem wearing a flavor costume. Swap a gram of coffee, ten degrees of water, or thirty seconds of contact time, and the cup in front of you changes character entirely — sharper, sweeter, thinner, richer. Most brewing advice stops at a rule of thumb: a ratio, a temperature, a steep time. The DABOV Brew Lab goes further, turning the actual math behind every method into eight instruments you can dial in by hand.

Start with the Brew Ratio Studio if you're chasing the SCA golden cup for V60, Chemex, drip or AeroPress — it converts any target strength into exact grams of coffee and water, cup by cup. Pulling shots? The Espresso Dial-In Lab reads your dose, yield and shot time and hands back a concrete grind fix instead of vague advice like "adjust to taste." Batch-brewing cold brew calls for different math entirely — the Cold Brew Planner sizes your jar, sets the concentrate ratio, and works out the dilution for every glass. The French Press Yield Adjuster solves the one thing most calculators ignore: the water your grounds trap, so the mug in your hand actually gets full.

For the meditative pour-over crowd, the 4:6 Method Guide lays out Tetsu Kasuya's full five-pour schedule with a built-in brew-along timer. Summer drinkers get the Iced Coffee Splitter, which predicts your glass's actual serving temperature as ice melts into the brew. The Bag Life & Subscription Planner answers the question every coffee drinker eventually asks — how long will this bag last, and what is each cup really costing you. And the Caffeine Curve Simulator charts how caffeine builds and fades through your day, so you can time your last cup around a good night's sleep.

Every calculator here is free, instant, and grounded in the same brewing science DABOV's roasters use daily — no login, no guesswork, just the numbers behind a better cup. Explore the full brewing series on the DABOV blog for the stories behind the science.