Why Grind Size Matters More Than You Think

Small grind adjustments can dramatically change flavour and extraction time.

Grind size is one of the most influential variables in coffee brewing, yet it’s often overlooked. Even with great beans and good equipment, the wrong grind can ruin the result.

Grind size controls how quickly water extracts flavour from coffee. Too coarse, and the coffee can taste weak or sour. Too fine, and it can become bitter or over-extracted. Each brewing method requires a specific grind size to achieve balance.

Espresso demands precision. Small grind adjustments can dramatically change flavour and extraction time. This is why café workflows rely on consistent grinder calibration and regular checks. For filter brewing, grind size affects clarity, sweetness, and mouthfeel.

At Stay Grounded, grinder setup and calibration are a major focus of our coffee consultancy services. Many issues blamed on beans or machines are actually grind-related. Helping cafés dial in properly saves time, reduces waste, and improves consistency.

For home brewers, using a quality grinder and adjusting grind size based on taste is one of the fastest ways to improve results. Grinding fresh, just before brewing, also preserves aroma and flavour.

Grind size isn’t just a technical detail, it’s a foundational part of good coffee. Understanding it gives you more control, better flavour, and a more enjoyable brewing experience, whether at home or behind the bar.