How many sec is 20 ms?
20 ms = 0.02 sec
Rounding 0.02 sec to 0 sec is off by 100%. At this value the decimals are worth keeping.
And how many ms is 20 sec?
20 sec = 20,000 ms
Formula: sec = ms × 0.001
ms to sec around this value
2 ms0.002sec
4 ms0.004sec
6 ms0.006sec
8 ms0.008sec
10 ms0.01sec
12 ms0.012sec
14 ms0.014sec
16 ms0.016sec
18 ms0.018sec
20 ms0.02sec
22 ms0.022sec
24 ms0.024sec
26 ms0.026sec
28 ms0.028sec
30 ms0.03sec
32 ms0.032sec
34 ms0.034sec
36 ms0.036sec
38 ms0.038sec
40 ms0.04sec