5 ms·And the number of seconds in a year is π*10^7, or close enough.by stereo 3y agoAnd the number of seconds in a year is π*10^7, or close enough.cperciva 3y agoEquivalent but perhaps more catchy: "Pi seconds are a nanocentury".fsckboy 3y agoso to measure a nanocentury you should basically count 3 thousands ... if you want a few more digits of accuracy, count the 3 thousands plus (√2)/10