# SDL_NS_PER_SECOND

Number of nanoseconds in a second.

## Header File

Defined in [<SDL3/SDL_timer.h>](https://github.com/libsdl-org/SDL/blob/main/include/SDL3/SDL_timer.h)

## Syntax

```c
#define SDL_NS_PER_SECOND   1000000000LL
```

## Remarks

This is always 1000000000.

## Version

This macro is available since SDL 3.2.0.

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[CategoryAPI](CategoryAPI), [CategoryAPIMacro](CategoryAPIMacro), [CategoryTimer](CategoryTimer)