---
title: Accelerometer.z
slug: Web/API/Accelerometer/z
tags:
  - API
  - Accelerometer
  - Accelerometer API
  - Generic Sensor API
  - Property
  - Reference
  - Sensor
  - Sensor APIs
  - Sensors
  - z
browser-compat: api.Accelerometer.z
---
{{APIRef("Sensor API")}}{{SeeCompatTable}}

The **`z`** read-only property of the {{domxref("Accelerometer")}} interface returns a double precision integer containing the acceleration of the device along its z axis.

If a feature policy blocks use of a feature it is because your code is inconsistent with the policies set on your server. This is not something that would ever be shown to a user. The {{httpheader('Feature-Policy')}} HTTP header article contains implementation instructions.

## Syntax

```js
var zAcceleration = accelerometer.z
```

### Value

A {{jsxref('Number')}}.

## Example

Acceleration is typically read in the {{domxref('Sensor.onreading')}} event callback. In the example below this occurs sixty times a second.

```js
let accelerometer = new Accelerometer({frequency: 60});

accelerometer.addEventListener('reading', e => {
  console.log("Acceleration along the X-axis " + accelerometer.x);
  console.log("Acceleration along the Y-axis " + accelerometer.y);
  console.log("Acceleration along the Z-axis " + accelerometer.z);
});
accelerometer.start();
```

## Specifications

{{Specifications}}

## Browser compatibility

{{Compat}}
