---
title: "Liquid filters: sum"
description: Returns the sum of all elements in an array.
api_name: liquid
source_url:
  html: https://shopify.dev/docs/api/liquid/filters/sum
  md: https://shopify.dev/docs/api/liquid/filters/sum.md
---

# sum

```oobleck
array | sum
```

returns [number](https://shopify.dev/docs/api/liquid/basics#number)

Returns the sum of all elements in an array.

```liquid
{% assign fibonacci = '0, 1, 1, 2, 3, 5' | split: ', ' %}


{{ fibonacci | sum }}
```

## Output

```html
12
```

### Sum object property values

```oobleck
array | sum: string
```

For an array of Liquid objects, you can specify a property to sum.

```liquid
Total quantity of all items in cart:
{{ cart.items | sum: 'quantity' }}


Subtotal price for all items in cart:
{{ cart.items | sum: 'final_line_price' | money }}
```

## Output

```html
Total quantity of all items in cart:
2


Subtotal price for all items in cart:
$422.49
```