There are 31,536,000 seconds in 1 year of a Gregorian Calendar.
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How to calculate the number of seconds in 1 year.
We know there are 60 seconds in 1 minute, and 60 minutes in 1 hour. We also know there are 24 hours in one day, and 365 days in one year. If we multiply all of those, we end up with 31,535,975 seconds in 1 year.
60 seconds in 1 minute x 60 minutes in 1 hour x 24 hours in 1 day x 365 days in 1 year = 31,535,975 seconds in 1 year.