1# Time units 2 3## Userspace exposed time units 4 5*zx\_time\_t* is in nanoseconds. 6 7Use [zx_clock_get()](syscalls/clock_get.md) to get the current time. 8 9## Kernel-internal time units 10 11*lk\_time\_t* is in nanoseconds. 12 13To get the current time since boot, use: 14 15``` 16#include <platform.h> 17 18lk_time_t current_time(void); 19``` 20