If you frequently use your Acaia coffee scale, we recommend you regularly calibrate it to ensure it remains accurate. We suggest you use F1 or F2 class calibration weights, like the 100g weight that comes with the Acaia Lunar or the 500g weights available on our site.

Before calibrating your Acaia coffee scale, it is important to ensure it has the latest firmware. You can check this through the Acaia Updater and the Pearl Updater. All the Acaia apps are available to download from the Apple App Store and Google Play Store.

Once your scale has the latest firmware, you can begin to calibrate it using your method of choice below. 

Smart Calibration

It is possible to use Smart Calibration to perform a quick calibration on the Acaia Lunar, Lunar 2021, Pearl, Pearl Model S, Pearl Model S 2022, Pearl 2021, and Pyxis scale. 

To perform a smart calibration, you should find a flat, stable surface within a quiet environment with little background noise. A busy environment with a lot of foot traffic could potentially interfere with the calibration. Once you have done so, you can begin to follow the steps below:

1. Make sure your scale is in “weigh-only” mode. This mode displays the weight and nothing else, as “0.0”. You can switch modes by long-pressing the power button.
2. Rapidly press the T button 6-7 times until the scale displays “CAL”. It will then display a number like “100” or “500”, but any F1 or F2 class weights that are 100, 300, 500, 1000, or 1500 grams will work. So, if it is displaying “500” but you only have a 100g weight, you can still use it.
3. Place your weight on the middle of the weighing surface until the calibration is complete.

Linear Calibration

A linear calibration is a more thorough method that makes sure your scale is calibrated in the lower, middle, and upper ranges of its weighing capacity. Three F2-class 500g weights are required to perform this calibration. This calibration may also help Error 303 with the caveat that the upper reaches of the weighing range (1500g - 2000g) might be inaccurate, depending on the damage to your scale.

1. With the scale powered off, press and hold the Power button.
2. When "Set" displays, continue to hold down the power button and press the T button. The scale will beep and show "F.0000". This is the scale’s password menu.
3. Long presses of T button advance to the next digit, while short taps will change the value of the digits (1-9). Enter "1221" for the linear calibration setup.
4. The scale will first calibrate a zero point. After this, you will be prompted to place 500g on the scale, then 1000g, then 1500g. Once the scale has calibrated 1500g, it will beep and read "End". Be sure to place the first weight in the middle of the weighing surface, and stack the other weights evenly. Also be sure to perform this calibration on a flat surface with little to no vibration.

Explore our range of Acaia Scales here.