Our forum has been available for many years. In September 2014 we decided to switch it to read-only mode. Month after month we saw less posts with questions and answers from real people and more spam posts. We were spending more and more resources cleaning the spam until there were less them 1 legitimate message per 100 spam posts. Then we decided it's time to stop.

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Thu Mar 06, 2008 1:32 am

It would be handy for me if the site included the dimensional analysis of units; I was converting Kilowatts to hp, and noticed that a watt was '1 Joule per second'. Outstanding, but what the heck is a Joule? I went to it's conversion page... and saw it converted to watt seconds. This wasn't as helpful as I would have liked.

Meters per second probably doesn't need a dimensional analysis published; it is obviously m / s; no problem there... but it would be nice to know exactly how more complex (or at least just SI) units break down into fundamental units. 1 Watt = 1 kg m^2 / s^3 and 1 Joule = 1 kg m^2 / s^2 is sometimes exactly the info needed; please consider adding this.

Meters per second probably doesn't need a dimensional analysis published; it is obviously m / s; no problem there... but it would be nice to know exactly how more complex (or at least just SI) units break down into fundamental units. 1 Watt = 1 kg m^2 / s^3 and 1 Joule = 1 kg m^2 / s^2 is sometimes exactly the info needed; please consider adding this.

Sun Nov 22, 2009 10:06 am

Here's a site that has a free online dimensional analysis (a.k.a. factor-label method) calculator

xfactor.digins.com

xfactor.digins.com

Sun Sep 26, 2010 4:20 am

Hi,

here is really good site for both conversions and physical constants calculations, which also does what you want,

after you get a result you can click simplify units to get the detailed units.

http://fermion.website.org

for example: if you type 1{J} you get 1 J you click simplify units and get 1 kg*m^2*sec^-2

to do a conversion you type 123{J}{eV} ...

also when you start typing a unit it gives you a list of available matching units to choose from.

tell me what you think.

here is really good site for both conversions and physical constants calculations, which also does what you want,

after you get a result you can click simplify units to get the detailed units.

http://fermion.website.org

for example: if you type 1{J} you get 1 J you click simplify units and get 1 kg*m^2*sec^-2

to do a conversion you type 123{J}{eV} ...

also when you start typing a unit it gives you a list of available matching units to choose from.

tell me what you think.

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