---
title: Create custom aggregate functions
description: Create your own custom aggregate functions in Flux using the `reduce()` function.
influxdb/v2/tags: [functions, custom, flux, aggregates]
menu:
  influxdb_v2:
    name: Custom aggregate functions
    parent: Custom functions
weight: 301
aliases:
  - /influxdb/v2/query-data/guides/custom-functions/custom-aggregate/
related:
  - /iflux/v0/stdlib/universe/reduce/
source: /shared/influxdb-v2/query-data/flux/custom-functions/custom-aggregate.md
---

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