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#https://www.notion.so/n8n/Frontmatter-432c2b8dff1f43d4b1c8d20075510fe4
contentType: howto
description: Call workflows from other workflows, and split large workflows into smaller components.
---
# Sub-workflows
You can call one workflow from another workflow. This allows you to build modular, microservice-like workflows. It can also help if your workflow grows large enough to encounter [memory issues](/hosting/scaling/memory-errors.md). Creating sub-workflows uses the [Execute Workflow](/integrations/builtin/core-nodes/n8n-nodes-base.executeworkflow.md) and [Execute Sub-workflow Trigger](/integrations/builtin/core-nodes/n8n-nodes-base.executeworkflowtrigger.md) nodes.
## Set up and use a sub-workflow
This section walks through setting up both the parent workflow and sub-workflow.
--8<-- "_snippets/flow-logic/subworkflow-usage.md"
## How data passes between workflows
--8<-- "_snippets/flow-logic/subworkflow-data-flow.md"
## Sub-workflow conversion
See [sub-workflow conversion](/workflows/subworkflow-conversion.md) for how to divide your existing workflows into sub-workflows.
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