Coffee Water Ratio Calculator

Roughly 1:16 to 1:18, coffee to water by weight, the range the Specialty Coffee Association generally points to for balanced filter coffee, meaning about 18 to 20 grams of grounds per 300 grams of water.

Yes, ratio controls strength, but grind size controls extraction rate and flow. The wrong grind for your brewing method can still produce a bitter or weak cup even at a technically correct ratio.

Yes, specialty coffee professionals weigh both in grams for consistency, since volume measurements like scoops vary too much based on grind and bean density to be reliable.

Yes, a pour-over or drip brew typically uses a lighter ratio around 1:16 to 1:17, while French press and cold brew often go stronger, closer to 1:12 to 1:15, since immersion methods extract differently than methods where water passes through the grounds once.

Bitterness usually points to over-extraction rather than a wrong ratio, often from grinding too fine, brewing too long, or using water that's too hot. Getting the ratio right solves strength, but extraction time and grind size are what solve flavor balance.

Often yes, since heavily chlorinated or mineral-heavy tap water can noticeably affect taste, and coffee is over 98% water by weight. It doesn't need to be exotic, filtered tap water solves most of the issue without needing to buy bottled water specifically for brewing.