# femtosecond, fs (unit)

This page documents an [OPTIMADE](https://www.optimade.org/) [Unit Definition](https://schemas.optimade.org/#definitions). See [https://schemas.optimade.org/](https://schemas.optimade.org/) for more information.

**ID: [`https://schemas.httk.org/defs/v0.1/units/si/general/femtosecond`](https://schemas.httk.org/defs/v0.1/units/si/general/femtosecond.md)**  
**Definition name:** `femtosecond`

**Unit name:** femtosecond  
**Latin symbol:** fs  
**Display symbol:** fs  
  
**Description:** A unit of time equal to 10^-15 seconds.



**Formats:** [[JSON](femtosecond.json)] [[MD](femtosecond.md)]

**JSON definition:**

``` json
{
    "$id": "https://schemas.httk.org/defs/v0.1/units/si/general/femtosecond",
    "$schema": "https://schemas.optimade.org/meta/v1.2/optimade/physical_unit_definition.json",
    "title": "femtosecond",
    "symbol": "fs",
    "display-symbol": "fs",
    "description": "A unit of time equal to 10^-15 seconds.",
    "x-optimade-definition": {
        "label": "femtosecond_si_general",
        "kind": "unit",
        "format": "1.2",
        "version": "0.1.0",
        "name": "femtosecond"
    }
}
```