# 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

![](https://2027676102-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F6BJWlEY36X5PnXFgzbFP%2Fuploads%2Fm6afEnoa8PKnHbrRt68i%2Fimage.png?alt=media\&token=996a71ec-ea26-4fd8-9bdd-cb8c59859ac5)

## 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. 

![](https://2027676102-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F6BJWlEY36X5PnXFgzbFP%2Fuploads%2FIjnp3GQ894tnXMjsJu5L%2Fimage.png?alt=media\&token=3d2b36f6-57d6-4416-ac74-f3524067c630)