Fix Sour & Bitter Coffee Shots Fast-calculator

⚙️ GrindSync

Burr Calibration & Particle Size Assistant

Stop wasting coffee. Align burrs, fix settings & diagnose particle spread — all in one tool.

🔧 Grinder model (select or type) Baratza Encore Niche Zero DF64 (Gen 2) Fellow Ode (Gen 2) Eureka Mignon Specialita Other / Manual grinder

🔄 Burr size & type 48mm flat burr (e.g., Baratza Virtuoso+) 54mm flat burr (e.g., Eureka Mignon) 64mm flat burr (e.g., DF64, Fellow Ode SSP) 83mm flat burr (e.g., Mazzer Major) 38mm conical (e.g., 1Zpresso Q2) 48mm conical (e.g., Baratza Encore) 63mm conical (e.g., Niche Zero) 68mm conical (e.g., Kinu M47) Unknown / Not sure

Burr geometry affects alignment sensitivity and shim recommendations

🔢 Current setting (e.g., "8", "12 clicks", "2.1")

☕ Brew method V60 / Pour-over Espresso French Press Aeropress Moka Pot

⚙️ Brew-specific details

👅 Last cup taste Sour (under-extracted, too coarse) Bitter (over-extracted, too fine) Muddy / Astringent (too many fines) Weak / Watery (needs finer grind) Perfect flavor but drawdown slow

Share your GrindSync diagnosis

GrindSync — free calculator for burr alignment & dialing in. No coffee wasted.

Buy me a coffee

ultimate grind guide french press vs pour-over light vs dark roast french press recipe pour-over guide

How to Make Perfect Coffee at Home with This Free Calculator Tool-BrewMetrics

Coffee Degassing Calculator

Espresso Water Calculator | Fix Sour Shots & Prevent Kettle Scaling

Espresso Puck Diagnosis Tool – Fix Channeling in 60 Seconds | RebrewRetro

📖 essential guide no tools required

How to Use the GrindSync Calculator
(And Why It’s a Game-Changer)

⚠️ Why it matters

Every grinder lies. A “5” on your Baratza Encore might be a “12” on a DF64, and most home baristas have no idea if their burrs are tilted by 0.2mm – enough to ruin a $20 bag of coffee. GrindSync solves three silent coffee killers: inter-brand chaos, hidden misalignment, and wasted dialing-in. Instead of guessing, you get prescriptive fixes: turn this many clicks, add foil shims under specific screws, and verify with a simple paper test.

🧭 How to use it (3 steps)

1. Input your gear

Grinder model, burr type (e.g., 64mm flat), current setting, brew method (V60/espresso/French press), and taste (sour/bitter/muddy).

2. Get 5 outputs

New setting, dry-erase marker alignment test, foil shim map, verification checklist, and filter paper particle target.

3. Perform 2-min test

Color bottom burr, reassemble, rotate, remove. Uneven wipe? Add shims exactly where the calculator says.

📐 The math behind it

Taste-to-micron mapping:

Sour = under-extracted → shift 150–200µm finer. Bitter = over-extracted → shift 200–300µm coarser.

Shim thickness calculation:

Marker wipe missing on 30% of the ring → burr tilt of ~0.07mm. One foil layer (0.1mm) shim under opposite screws corrects 80% of cases.

Step resolution database:

GrindSync uses internal step sizes: Niche Zero = 30µm per number; Baratza Encore = 45µm per click. Your “8 to 5” equals a 135µm move toward ideal extraction.

❓ Common questions answered

Does it work for any grinder? Yes – even manual grinders. Select “Other” and enter your model. The logic adapts to any burr type.

Do I need tools? Only a dry-erase marker, aluminum foil, and black filter paper. All found at home or office.

How often to realign? Every 3–6 months or after deep cleaning burrs. GrindSync reminds you to re-test.

What if I have a stepped grinder? Works perfectly. The calculator interprets “clicks” and translates to micron adjustments.

☕ Stop wasting coffee. Let the math – and your marker – do the work.

Trusted by home baristas & coffee enthusiasts worldwide.