---
type: "fhirpath-function"
title: "FHIRPath Function: avg"
function: "avg"
category: "Aggregates"
section: "7.5"
source: "fhirpath/functions.json"
---
# FHIRPath Function: avg
_No canonical section match found in index.md._
## Summary
- **Category**: Aggregates
- **Section**: `7.5`
- **Return Type**: `Decimal | Quantity`
- **Empty Input Result**: `empty`
- **Errors on Multiple Input**: `false`
## Description
Returns the average of all elements in the input collection (in the same type).
## Arguments
- none
## Type Mapping
- `Integer-Decimal`
- `Long-Decimal`
- `Decimal-Decimal`
- `Quantity-Quantity`
## Example
```fhirpath
(5.5 | 4.7 | 4.8).avg() // 5.0
```