Hey r/Coffee — I’ve been using a small mobile-first PWA called BrewRatio to dial in pour-over doses without mental math when the kettle’s already hot. What it’s for quick bean / water / ratio conversions scaling a single-cup recipe up if I’m brewing for more than one mug keeping a few presets I actually repeat

Try it: https://brewratio.mmbbcc.top/cal... I’m mostly looking for brutally honest UX feedback (defaults, copy, edge cases, methods I should add). If this reads too promotional for the sub, happy to take it down or repost in a weekly thread.

This page is a free Coffee Brew Ratio Calculator tool, designed for coffee lovers who use brewing methods like V60, Chemex, AeroPress, and French Press.

Core features:

Auto Ratio Calculation
Adjust any one value — coffee grams, water volume, or brew ratio — and the other figures update automatically in real time. It shows the exact ratio and corresponding coffee/water dosage.
Recipe Scaler
It scales coffee recipes up or down while keeping the same brew ratio. Users can input a base recipe and set a new target water volume, then the tool automatically calculates the required coffee dose.
Brew Timer & Step Presets
It provides detailed standard brewing guides and timing presets for each method, including recommended coffee dosage, total brew time, bloom time, bloom water amount, pouring stages, stirring, steeping and pressing steps. Users can follow the exact time and process to brew coffee with consistent flavor easily.

This page is a free Coffee Brew Ratio Calculator tool, designed for coffee lovers who use brewing methods like V60, Chemex, AeroPress, and French Press.

Core features:

Auto Ratio Calculation
Adjust any one value — coffee grams, water volume, or brew ratio — and the other figures update automatically in real time. It shows the exact ratio and corresponding coffee/water dosage.
Recipe Scaler
It scales coffee recipes up or down while keeping the same brew ratio. Users can input a base recipe and set a new target water volume, then the tool automatically calculates the required coffee dose.
Brew Timer & Step Presets
It provides detailed standard brewing guides and timing presets for each method, including recommended coffee dosage, total brew time, bloom time, bloom water amount, pouring stages, stirring, steeping and pressing steps. Users can follow the exact time and process to brew coffee with consistent flavor easily.