---
title: "Easing"
description: "Easing is a way to adjust an animation’s fraction. Easing allows transitioning elements to speed
up and slow down, rather than moving at a constant rate.

Fraction is a value between 0 and 1.0 indicating our current point in the animation where 0
represents the start and 1.0 represents the end.

An [Easing] must map fraction=0.0 to 0.0 and fraction=1.0 to 1.0."
type: "interface"
---

<div class='type'>Interface</div>


<a id='references'></a>

<div class='sourceset sourceset-common'>Common</div>



```kotlin
public fun interface Easing
```


Easing is a way to adjust an animation’s fraction. Easing allows transitioning elements to speed
up and slow down, rather than moving at a constant rate.

Fraction is a value between 0 and 1.0 indicating our current point in the animation where 0
represents the start and 1.0 represents the end.

An `Easing` must map fraction=0.0 to 0.0 and fraction=1.0 to 1.0.


## Functions

```kotlin
public fun transform(fraction: Float): Float
```