Free coffee calculators that actually know coffee.

Five tools built around real SCA standards, published barista techniques, and click settings for the most popular grinders. No signup, no fluff — just exact numbers for your next cup.

Home  ›  Tools
5
free calculators
11
grinders supported
7
brew methods covered
$0
forever
Most popular

Coffee-to-Water Ratio Calculator

Pick your brew method, choose strength, and get exact gram measurements with the right grind size, water temperature, and a pour schedule that actually works. Built around the SCA Golden Cup standard.

  • 7 brew methods
  • Grind size guide
  • Pour schedule
  • SCA Golden Cup
  • No-scale fallback
Calculate your recipe →
Save money

Cost Per Cup Calculator

See your true cost per cup at home vs. the café — and how fast better gear pays itself off out of your café savings.

  • Home vs. café
  • Annual savings
  • Gear payback
Run the numbers → Sleep better

Caffeine Calculator

Total caffeine, FDA limit gauge, and how much will still be in your system at bedtime. Adjusts for metabolism speed.

  • Decay chart
  • Cutoff time
  • FDA limits
Track your intake → Dial it in

Grind Size Calculator

Recommended grind for your brew method, with click settings for 11 popular grinders. Plus a troubleshooting mode for off-tasting brews.

  • Click settings
  • 11 grinders
  • Troubleshooting
Find your setting → Nail the timing

Brew Time & Bloom Calculator

Personalized pour schedule with bloom water, pulse timing, and a built-in timer that tells you what to do at every step.

  • Built-in timer
  • Pour schedule
  • Scaled to dose
Start brewing →

Build a perfect cup, one tool at a time

Each calculator handles one variable — use them together to dial in any brew from scratch.

First

Get your ratio

Exact grams of coffee and water for your method.
Then

Dial in the grind

Find the right click setting for your grinder.
Then

Time the brew

Personalized pour schedule, timed by stage.
Optional

Check the cost

See what your habit's really costing — and what to upgrade.

About these tools

Every recipe and click setting on RoastRanked is sourced from documented barista techniques, SCA Golden Cup standards, manufacturer manuals, and aggregated forum/community data. Numbers are starting points, not absolutes — your taste, your beans, and your equipment will move the sweet spot. Every calculator includes a "how this works" explainer so you can adjust intelligently.

Built and maintained by the RoastRanked team. Spotted an error or have a calculator request? Get in touch.