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#BAFact: An easy way to remember the number of seconds in a year: pi x 10 million. Accurate to better than 0.5%.

In a year, there are 86,400 seconds per day x 365.24 days per year, for a total of 31 556 736 seconds.

Pi x ten million is 31,415,926. That difference of 140 810 seconds - 1.6 days - is less than a half percent error!

So pi x ten million is a fairly accurate way to remember how many seconds there are in a year. You're welcome.

[Note: edited to fix a mistake on my part; I gave the numbers of seconds in a year and said it was for a "non-leap" year, but in fact it's for the average year length.]
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