How to calculate load average is high or normal?

How to define/find some x.x value is high load by lokkin into uptime in linux server if i've 4 cpus? Is there any formula to calculate?

CPU(s):                   4
  On-line CPU(s) list:    0-3
Vendor ID:                GenuineIntel
  Model name:             Intel(R) Xeon(R) Platinum 8259CL CPU @ 2.50GHz
    CPU family:           6
    Model:                85
    Thread(s) per core:   2
    Core(s) per socket:   2
    Socket(s):            1
    Stepping:             7

$ uptime
 14:01:38 up 15 min,  2 users,  load average: 7.09, 3.44, 1.96

Current load average is high. But still server is working fine.

$ uptime
 14:39:50 up 53 min,  5 users,  load average: 31.95, 29.13, 24.25

Output of vmstat

$ vmstat 1 3
procs -----------memory---------- ---swap-- -----io---- -system-- ------cpu-----
 r  b   swpd   free   buff  cache   si   so    bi    bo   in   cs us sy id wa st
16  0      0 15798924   2168 189096    0    0   329    25  103  117 62  1 37  0  0
16  0      0 15798924   2168 189096    0    0     0     0  405  433 100  0  0  0  0
16  0      0 15798924   2168 189096    0    0     0     0  408  441 100  0  0  0  0

I've see few link. However i couldn't understand.