Coffee water drops calculator
Pick your mineral product, how much water you're making, and the ppm you want.
Add 32 drops of APAX Jamm to 500ml of distilled or reverse-osmosis water for 152 ppm.
How it works
Mineral drops are concentrates: each one adds a known amount of dissolved minerals to your water, measured in ppm (parts per million). The calculator assumes a standard glass dropper at 20 drops per ml, starting from distilled or reverse-osmosis water with nothing in it.
Droppers vary. If you have a TDS meter, measure what a few drops actually give you — Cuplift lets you calibrate each product so its recipes use your real numbers.
What ppm should I brew with?
Most filter recipes sit somewhere between 80 and 150 ppm. More minerals extract harder and give the cup more weight; fewer extract more gently and read cleaner and brighter. If your coffee tastes salty or metallic, the water is the first thing to bring down. What each mineral does explains the difference between the products.