How many microseconds are there in a year?

Answer 1

This depends on the definition of "year". Even when agreeing that "year" is related to Earth, there are different time systems that give different lengths for years. Such systems are usually synchronized by adding or subtracting amounts of time at some intervals. So even on Earth, years do have varying lengths.

Commonly known to westerners would be the 29th of February, which is added every 4 years (but not every 100 and so on - it is rather complicated), making this "leap year" a day longer. Other, smaller measures ("leap seconds") are used to synchronize, for example coordinated universal time ("UTC") and mean solar time .

A rough estimate would be the following:

There are about 31,536,000,000,000 (almost 32 trillion microseconds) in 365 days. Figured as follows: 1,000,000 ms = 1 sec. x 60 sec/min = 60,000,000 ms x 60 min/hour = 3600000000 ms x 24 hours/day = 86400000000 ms x 365 days/year = 31536000000000 ms