# Suspending functions into blocking functions or CompletableFuture

DevFeed: [Suspending functions into blocking functions or CompletableFuture](<https://devfeed.tech/articles/suspending-functions-into-blocking-functions-or-completablefuture-39325.md>)

Original publisher: [Read original article](<https://kt.academy/article/interop-coroutines-to-blocking>)

Published: 2025-09-29T00:00:00Z

Content type: tutorial

Language: en

Sources: [Kt. Academy](<https://devfeed.tech/sources/kt-academy.md>)

Topics: [Kotlin](<https://devfeed.tech/topics/kotlin.md>), [kotlin-coroutines](<https://devfeed.tech/topics/kotlin-coroutines.md>), [Coroutines](<https://devfeed.tech/topics/coroutines.md>), [Java](<https://devfeed.tech/topics/java.md>), [functions](<https://devfeed.tech/topics/functions.md>)

Tags: [blocking](<https://devfeed.tech/tags/blocking.md>), [coroutines](<https://devfeed.tech/tags/coroutines.md>), [guide](<https://devfeed.tech/tags/guide.md>), [how-to](<https://devfeed.tech/tags/how-to.md>), [kotlin](<https://devfeed.tech/tags/kotlin.md>), [kotlin-coroutines](<https://devfeed.tech/tags/kotlin-coroutines.md>), [workshop-learning-programming](<https://devfeed.tech/tags/workshop-learning-programming.md>)

## AI overview

A guide to converting suspending functions into blocking functions or CompletableFuture in Kotlin Coroutines, with advice for APIs used by Java or non-coroutine Kotlin callers.

## Source excerpt

A guide on how to correctly convert suspending functions into blocking functions or CompletableFuture in Kotlin Coroutines.