> For the complete documentation index, see [llms.txt](https://docs.wem.io/platform/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.wem.io/platform/wemreference/functions/aggregation/sum.md).

# Sum

{% hint style="info" %}
The **`Sum()`** function calculates the total <mark style="color:blue;">value</mark> of a list of numbers or durations.

This function is SQL compatible. For more information about SQL compatibility, see our [documentation](/platform/wemreference/sql-compatibility.md).
{% endhint %}

{% hint style="success" %}
Returns a <mark style="color:green;">number</mark> or duration that is the total value of the given `values`.

Returns <mark style="color:red;">**`Unknown`**</mark> if one of the parameter values is unknown or outside the common valid date boundaries.
{% endhint %}

### Syntax

<details>

<summary><code>Sum(</code><mark style="color:blue;"><code>List(values) </code></mark><em><mark style="color:blue;"><code>or</code></mark></em><mark style="color:blue;"><code> [field] of [list]</code></mark><code>)</code></summary>

`Sum(List(1, 2, 5))`\
\=>*Result: 8*

`Sum([Products.Price] of [Products])`\
\=> *Result: the summation of all Price-value of all products in the list* `[Products]`&#x20;

`Sum()`\
\=>*Result: unknown*

</details>

### Parameters

<table><thead><tr><th width="180.20869378712746">Name</th><th width="150">Type</th><th width="150" align="center">Required</th><th width="248.15953250810662">Description</th><th data-hidden>Required?</th></tr></thead><tbody><tr><td><mark style="color:blue;"><code>values</code></mark></td><td>list</td><td align="center"><span data-gb-custom-inline data-tag="emoji" data-code="2611">☑️</span></td><td>the list of values of which the sum is calculated. The values can be either numbers or durations.</td><td>yes</td></tr></tbody></table>


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