> ## Documentation Index
> Fetch the complete documentation index at: https://docs.upstackdata.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Avg. Session Duration: Time Spent Per Visit

> Track average time visitors spend on your site per session. Longer sessions indicate higher engagement and content relevance.

<Tip>
  Avg. Session Duration measures the average total time visitors spend per session on your site, indicating overall engagement depth.
</Tip>

## Formula

<Info>
  **Avg. Session Duration** = **Total Session Time** ÷ **Session Count**
</Info>

### Formula Components

| Metric                                                                | Definition                              |
| --------------------------------------------------------------------- | --------------------------------------- |
| **Total Session Time**                                                | Sum of all session durations in seconds |
| [**Session Count**](/reference/metrics/funnel/sessions/session-count) | Total number of sessions                |

| Metadata        |                         |
| --------------- | ----------------------- |
| **Type**        | Duration                |
| **Data Source** | [Upstack Pixel](/pixel) |
| **Aggregation** | Average                 |

***

## Example

Your store's **8,500 sessions** averaged **3 minutes 42 seconds** (222 seconds) per visit.

| Device  | Sessions | Avg. Duration |
| ------- | -------- | ------------- |
| Desktop | 3,400    | 4:15          |
| Mobile  | 4,200    | 3:05          |
| Tablet  | 900      | 3:45          |

***

## How It Works

Session duration is measured from the first page load to the last tracked event. Longer durations typically correlate with higher purchase intent and conversion rates. The metric includes both active engagement and idle time.

***

## When to Use

| Scenario                    | Action                                         |
| --------------------------- | ---------------------------------------------- |
| Declining session duration  | Review page load speed and content quality     |
| Comparing traffic sources   | Identify which channels bring engaged visitors |
| Content optimization        | Measure impact of content changes              |
| Mobile vs. desktop analysis | Identify device-specific UX issues             |

***

## Related Metrics

| Metric                                                                             | Relationship                          |
| ---------------------------------------------------------------------------------- | ------------------------------------- |
| [Avg. Active Time](/reference/metrics/funnel/sessions/avg-active-time)             | Time actively engaged (excludes idle) |
| [Avg. Idle Time](/reference/metrics/funnel/sessions/avg-idle-time)                 | Time spent inactive                   |
| [Avg. Pages per Session](/reference/metrics/funnel/sessions/avg-pages-per-session) | Pages viewed per session              |

[See all Session metrics →](/reference/metrics/funnel/sessions)