About CoffeeRatio
CoffeeRatio is an independent brewing reference for home brewers who want their morning coffee to be repeatable. We build one thing carefully: the arithmetic layer of coffee — ratios, doses, bloom water, brew times — connected to a calculator you can actually trust.
Why the site exists
Every coffee instruction worth following is written in grams and ratios, but almost nobody publishes where their numbers came from. We got tired of recipe pages that quietly mix up brew strength with extraction, or state "the ideal ratio" with no source. So we work the other way: every number on this site traces to a named, linkable source — Hario's own V60 pages, Bialetti's moka guide, AeroPress's official FAQ, Toddy's instruction sheet, illy's espresso preparation guide, Counter Culture's brew guides, Blue Bottle and Stumptown recipes, and the SCA's standards where they apply. Where sources disagree, we show the range. Where something is consensus rather than a published figure, we say so.
Editorial standards
- Verify or drop. Facts are checked against their named source on the date stamped at the top of each page ("Last verified"). What we cannot verify gets phrased honestly or cut.
- Attribute everything. We never repack a specific roaster's recipe as universal truth; each preset names its anchor. We do not invent recipes for named cafés.
- Ranges over dogma. Brewing is taste. We present official starting points and the logic for departing from them.
- Corrections welcome. If a number here is wrong against its cited source, email us and we will fix it and note the change.
How content is made
Pages are researched and written in-house, around the calculator engine (open, tested code you can audit on this site's repository copy). We do not accept guest posts or sponsored recipes. The site is funded by advertising and affiliate links to gear categories (scales, grinders, kettles) that appear as clearly labeled cards — see our disclosure page.
Questions, corrections, or a ratio argument you need settled: contact us.