The coffee calculator suite

Sixteen tools built around one idea: weigh everything, guess nothing. Free, fast, and they work offline.

Hario V60 water weight, grind setting and a timed pour schedule down to the second.

3, 6, 8 and 10 cup Chemex weights, plus why the thick filter wants a coarser grind.

Concentrate or ready-to-drink, with steeping time and the dilution maths done for you.

2, 3, 6 and 9 cup Bialetti weights. The basket fixes the dose — this fixes the water.

Standard, inverted and competition concentrate recipes with a 1:30 press schedule.

Exact weights for a 4-minute immersion brew that stays clean instead of muddy.

Dose to yield in grams, forward or reverse, with shot time and basket guidance.

How much milk to pour for a cortado, flat white, latte or cappuccino, by volume.

Keep a record of every shot: dose, yield, ratio, time and taste notes.

Time the extraction and log what worked. Stored privately on your own device.

Every grind from Turkish to cold brew, matched to its brewer and checked by feel.

Nine brew methods with dose, water and time already worked out in grams. Printable.

Correct dose for every basket from 7 g to 22 g, plus the coin test for overdosing.

New here? Start with the ratio.

Espresso is the fastest way to see the effect of weighing instead of eyeballing.