Time conversion formula

Questions and answers on how to convert things from one unit or system to another

Moderator: convert-me.com

Time conversion formula

Postby dowjd » Sun Aug 21, 2005 4:27 am

I'm trying to comvert 1,000,000,000 seconds to years.

Can anyone give me the conversion formula.[/list]
dowjd
 
Posts: 3
Joined: Fri Aug 19, 2005 9:02 am

Postby Guest » Sun Aug 21, 2005 5:57 am

86400 s per day.

Years become the tricky part, and you may need to consider four possible numbers.
*Every year has either 365 or 366 integer days exactly
*Four year periods have 1461 days (365.25 days per year average), unless you cross one of those Gregorian centuries
*400 year Gregorian periods have 146097 days (365.2425 d/year average)

First pass, I'd use 365.25 days/per year and get 31.688 years.
If you want to go beyond that, you'd have to look at the starting date and consider the details of when leap years occur.

If I suspected over 100 years, I'd use the Gregorian average, 365.2425 days.
Guest
 

Time Conversion Formula

Postby dowjd » Sun Aug 21, 2005 10:03 am

Anonymous wrote:86400 s per day.

Years become the tricky part, and you may need to consider four possible numbers.
*Every year has either 365 or 366 integer days exactly
*Four year periods have 1461 days (365.25 days per year average), unless you cross one of those Gregorian centuries
*400 year Gregorian periods have 146097 days (365.2425 d/year average)

First pass, I'd use 365.25 days/per year and get 31.688 years.
If you want to go beyond that, you'd have to look at the starting date and consider the details of when leap years occur.

If I suspected over 100 years, I'd use the Gregorian average, 365.2425 days.



Thanks for your response.

Could you tell me the mathematical formula to convert sec to years.

I think it is divide 86400 into 1 billion, then divide 365.25 into 11574 = 31.69.

Is this correct?
dowjd
 
Posts: 3
Joined: Fri Aug 19, 2005 9:02 am

Postby Guest » Sun Aug 21, 2005 6:04 pm

Yes.

An alternative is to multiply the two constants together, to get 31,557,600 s/year.

(That also works using 365 or 366 days for common and leap years, slightly different final digits)
Guest
 


Return to How to convert?

Who is online

Users browsing this forum: No registered users and 5 guests

Our Privacy Policy       Cooking Measures Converter       Metric conversions