---
title: lifetime
product: Unity Editor
version: '7000.0'
latest_version: '7000.0'
status: This page documents version 7000.0. The latest version is 7000.0.
canonical: https://docs.unity.com/en-us/engine/7000.0/script-reference/unityengine/particlesystem/particle/lifetime
latest_url: https://docs.unity.com/en-us/engine/7000.0/script-reference/unityengine/particlesystem/particle/lifetime.md
last_updated: 2026-10-07
generated_at: 2026-11-11T14:48:46.988Z
locale: en-us
---

# lifetime

> The lifetime of the particle.

## Definition

* **Type:** Property
* **Namespace:** [UnityEngine](/engine/7000.0/script-reference/unityengine.md)
* **Assembly:** UnityEngine.ParticleSystemModule

> **Warning:**
>
> **Deprecated.** Please use Particle.remainingLifetime instead.
>
> **Upgrade to** [ParticleSystem.Particle.remainingLifetime](/engine/7000.0/script-reference/unityengine/particlesystem/particle/remaininglifetime.md)

```csharp
public float lifetime { get; set; }
```

### Remarks

This is the time in seconds for how long this particle remains alive. When the lifetime drops below zero the system destroys the particle.