Metric seconds are quite close to regular seconds since there are 100,000 metric seconds in a full day compared to 86400 regular seconds.

Which means that 40 metric seconds is about 46.3 regular seconds - I.E. something is wrong with the charts on this website.

It also means a metric minute which is 100 seconds would be 115.7 regular seconds so a bit less than two minutes, not 2.4 minutes as claimed.