— RoastWorthy · Interactive coffee lab

Free Coffee Tools & Calculators, Quizzes

Turn the variables that shape coffee into clear next steps. Ten free calculators, finders, quizzes and games for ratio, grind, espresso, freshness, gear, batch size and cost.

Choose a tool

No sign-up

Designed for mobile

Coffee tool bench

10 focused tools

Recipe

1:16

18.8 g · 300 g

Grind

18–22

Encore · pour over

Espresso

1:2

18 in · 36 out

Freshness

Day 08

peak window

Batch

60 g

4 cups · 960 g

Quiz

8 / 10

coffee geek

Calculators · finders · quizzes

No sign-up

— Choose your tool

Free Coffee Tools, Calculators & Quizzes

RECIPE + TIMER

Brew Recipe Builder

Exact dose, temp, grind + a timed pour schedule

GRINDERS

Grind Size Finder

Real click settings for popular grinders

QUIZ

Gear Finder Quiz

Which brew method, grinder or espresso machine

COLD BREW

Cold Brew Calculator

Concentrate + servings, absorption included

FRESHNESS

Bean Freshness Tracker

Rest window and peak from your roast date

RATIOS

Batch & Scaling

Coffee for N cups, or cups from X grams

QUIZ

Coffee IQ Quiz

10 scored questions, reasoning on each

GAME

Guess the Roast

Read light, medium or dark by sight

Home vs Café Cost

Home vs Café Cost

Your real yearly savings + gear payback

Every tool here follows the same standard as the rest of RoastWorthy: exact numbers, the reasoning behind them, and no fluff. Build a timed brew recipe, find the grind setting for your specific grinder, dial in an espresso shot, size a cold brew batch, check whether your beans are fresh, scale coffee for a crowd, test your coffee IQ, learn to read a roast by sight, or work out how much money brewing at home would save you. Each opens as its own page, works on mobile, and links to the in-depth guide behind it. Pick the one that matches what you're brewing today.