Free coffee calculators and brewing timers we design and build ourselves at Coffee Informer. Each one shows the maths behind its answer, works on your phone and needs no sign-up.
Quick answer: Start from a target recipe (for a medium roast, 18 g of coffee in and 36 g of espresso out in 25–30 seconds), pull a shot, and change one thing at a time. Fast and sour: grind finer.…
Quick answer: Pick a published pour-over recipe, choose a small (250 g), medium (375 g) or large (500 g) brew, and press…
Quick answer: Caffeine’s half-life in healthy adults is usually 3 to 7 hours, so half of an afternoon coffee can still be…