# How to perform a Zero Offset calibration

## Step 1. Navigate to the [Calibration](https://app.onegiantleap.co.nz/calibration) page of the Web Bluetooth app and connect to the power meter

![](/files/1GazQbYHM2IxkYLOnTQa)

## Step 2. Perform the Zero Offset calibration 

* Make sure that the Power Meter is not experiencing any force when you perform the 'ZO' calibration. It's best practice to stand the paddle vertically by leaning it against a wall. This ensures that the shaft is experiencing as little bending as possible. 
* Click on "Zero Offset".
* The Zero Offsets will update automatically. 

![](/files/8rYD1NtZVwkiffpGNj9s)


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