Extraction · March 2026
Why a three-second shift in drawdown changes more than taste
Head of Beverage Standards Eleanor Price explains what faster or slower percolation does to service consistency, not just cup profile.
Read →
Coffee & Barista Standards
Brew ratios that hold up during a full service.
GrindLogic turns brew planning into clear production numbers. Use it to set dose, target beverage weight, and service batches without relying on rough notes taped to the grinder.
4,217 brew plans reviewed
Used by 183 café teams
Built for baristas and trainers
Live Bench Sheet
Filter brew target
320 g20 g dose at 1:16
Balanced for washed Ethiopia
Balanced for washed Ethiopia
Batch prep
2.56 LEight drinks, 160 g each
Shift-ready hot hold plan
Shift-ready hot hold plan
Service note
3:05Drawdown window for medium grind
Outside range prompts re-check
Outside range prompts re-check
Badge: Daily calibration held within ±0.18 TDS across the last 27 training runs. That level of stability is what this calculator is designed to support.
Brew Ratio Calculator
Set a dose, choose a brew ratio, and check beverage weight, strength guidance, and batch scaling in one place.
Target water for one brew—
Total beverage for service batch—
Estimated coffee needed for batch—
Strength guidance—
How teams use GrindLogic
The tool is deliberately narrow. It answers the numbers that matter before service starts.
1. Set the recipe standard
Trainers define a baseline ratio for each coffee and log beverage targets that new staff can repeat on day one.
2. Translate recipe into service volume
Shift leads scale a single brew into a realistic batch plan instead of doing mental math between tickets.
3. Flag drift quickly
When taste moves thin or heavy, the strength note gives a fast reason to review grind, dose accuracy, or water load.
Recent field notes
Short reads from barista training, extraction review, and workflow design.
Workflow · March 2026
The station audit that cut remake drinks in one London café
Marcus Hale breaks down a practical bar layout review that reduced recipe errors without buying new equipment.
Read →Water & Grind · March 2026
Water first, grind second: the order skilled baristas use to solve flat cups
Nina Rowe outlines a disciplined troubleshooting sequence for cafés that keep changing grinders when the water profile is the real issue.
Read →Testimonials
Feedback from working bar teams.
⭐ 4.7/5 from 312 users
“We stopped guessing batch sizes.”Our morning lead used to rewrite brew sheets every week. GrindLogic gave us one standard sheet that matched what we actually serve. — Priya D., training manager
27-site rollout
“Useful in training and during handover.”The strongest part is that new staff see beverage weight and batch scaling together. That closes a common blind spot. — Owen C., regional coffee coach
183 teams active
“Numbers are clear enough for a busy bar.”No extra tabs, no spreadsheet clutter. We use the calculator in briefing, then again when a coffee starts tasting narrow. — Harriet V., café owner
FAQ
Questions baristas ask before they standardize a recipe.
Should I fix ratio before changing grind?
Yes. Set a target ratio first. That gives you a stable output, then use grind size to move extraction time and flavor.
Does the calculator replace tasting?
No. It removes avoidable math errors. Sensory review still decides whether the final ratio is correct for the coffee.
Can I use it for batch brew training?
Yes. The batch fields help translate a single cup recipe into brewer output for service planning.
Why include per-drink beverage weight?
Because service standards fail when teams know the ratio but not the actual drink size handed across the counter.
What if drawdown time looks right but the cup tastes flat?
Check water composition and grind freshness. Time alone does not confirm proper extraction quality.
Is this free to use?
Yes. Every tool on GrindLogic is accessible without signup and works on current mobile browsers.