###### (This is the documentation for SDL3, which is the current stable version. [SDL2](https://wiki.libsdl.org/SDL2/) was the previous version!) # SDL_STANDARD_GRAVITY A constant to represent standard gravity for accelerometer sensors. ## Header File Defined in [](https://github.com/libsdl-org/SDL/blob/main/include/SDL3/SDL_sensor.h) ## Syntax ```c #define SDL_STANDARD_GRAVITY 9.80665f ``` ## Remarks The accelerometer returns the current acceleration in SI meters per second squared. This measurement includes the force of gravity, so a device at rest will have an value of [SDL_STANDARD_GRAVITY](SDL_STANDARD_GRAVITY) away from the center of the earth, which is a positive Y value. ## Version This macro is available since SDL 3.1.3. ---- [CategoryAPI](CategoryAPI), [CategoryAPIMacro](CategoryAPIMacro), [CategorySensor](CategorySensor)