How to Calibrate Your Breville Grinder — Step by Step

If you've moved the Breville grind dial to the finest setting and shots are still running too fast, the internal burr position likely needs adjusting. This is called calibration. This is common when: • You've changed to much lighter roast beans • The grinder is new and set to a factory-default position • The burrs have worn down over time

Breville grinders have two adjustment points: 1. The external grind dial (numbered settings you turn daily) 2. An internal burr position that shifts the entire range finer or coarser Calibration adjusts the internal position so your external dial covers the right range for your beans. It's like shifting the goalposts.

1. Remove the hopper and the top burr (ring burr) 2. Look for the internal calibration ring — it has notches 3. Turn the ring one notch toward 'finer' 4. Reassemble the top burr and hopper 5. Grind a dose and pull a test shot 6. Repeat if needed — one notch at a time Important: Always grind a full dose after adjusting to clear any loose grounds from the old setting.

The Barista Pro uses a similar process but with a digital grind dial: 1. Remove the hopper 2. Locate the upper burr and twist to remove 3. Adjust the internal calibration (refer to the Breville video guide for your specific model) 4. Reassemble and test The Pro's finer digital increments (30 settings) mean you may not need to calibrate as often as the Express.

• Only adjust one notch at a time — the change is significant • Always run a full dose through after adjusting to clear old grounds • If shots are too slow after calibration, move one notch back toward coarser • Keep track of your current calibration position so you can return to it • Calibration is bean-dependent — you may need to recalibrate when switching between very different roast levels

If calibration doesn't fix the issue, the burrs may be worn and need replacing (typically after 500-1000kg of coffee). Alternatively, the grinder retention could be causing inconsistency. Our AI barista or expert team can help diagnose grinder issues — including whether it's a calibration, burr wear, or retention problem.