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Q:

# How many seconds are in a day ?

A:

There are 86,400 seconds in a day. This calculation is based on the conventional definition of the length of a day; for convenience, a day is defined as 24 hours.

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A day is considered to be the amount of time it takes the earth to rotate once around its axis. This rotation takes 23 hours, 56 minutes and 4.1 seconds, which is exactly 86,164.1 seconds long.

If you measure the length of a day in solar time, it varies depending on the time of the year. Using solar time, the length of a day in seconds varies from 86,325 seconds to 86,471 seconds.

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## Related Questions

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Light from the Sun travels 93 million miles, at a speed of 186,000 miles per second, to get to Earth in about 8 minutes and 20 seconds. People on Earth see the Sun as it was 8 minutes and 20 seconds ago.

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To convert degrees, minutes and seconds (DMS) to decimal format, use the whole number provided for degrees and add a decimal point. Then divide the minutes by 60 and the seconds by 3600 and add these two numbers together to get the remaining portion. Expressed as a formula, decimal degrees = degrees + (minutes/60 + seconds/3600).

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According to the U.S. Census Bureau, there is one birth every eight seconds in the United States, or about 10,800 births per day. Worldwide, approximately 350,000 to 400,000 people are born daily on average.